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		<title>Lenticular Colour</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/lenticular-colour/</link>
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		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Thu, 16 Apr 2026 18:33:35 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=6237</guid>

					<description><![CDATA[THE LENTICULAR PROCESS
One of the simplest and most elegant
of all the proposals for the making of color reproductions. This is the lenticular
process, which requires no special camera or special processing technique,
except that a special type of film has molded on its back a series of lenticular
elements which divide the surface into a honeycomb structure. 
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<div class="et_pb_text_1 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400;"><em><strong>The History of Color Photography</strong> </em>Joesph S Friedman, PhD The American Publishing Company, Boston 1945 Page 214,</p>
<p style="font-weight: 400;">THE LENTICULAR PROCESS</p>
<p style="font-weight: 400; text-align: justify;">In this chapter we turn our attention to one of the simplest and most elegant of all the proposals for the making of color reproductions. This is the lenticularprocess, which requires no special camera or special processing technique,except that a special type of film has molded on its back a series of lenticularelements which divide the surface into a honeycomb structure. For a longtime after the idea was first proposed, nothing was done with it. But later itbecame extremely popular, and for atime it was thought that this schemesolved all problems of motion pictures in color. Some idea regarding the position<span style="font-weight: 400;">which lenticular film held in the industry may be obtained from the fact that fully one-third of the patents dealing with color reproduction ithe decade 1925-1935, dealt in one way another</span></p>
<p style="text-align: justify;"><strong><em>Colour Cinematography</em></strong> Adrian Cornwell-Clyne Third Edition 1951 Chapman and Hall p319</p>
<p style="text-align: justify;">THE KODACOLOR PROCESS' Kodacolor is a three-colour additive process which realizes the principle of a line screen method without the added difficulty of ruling a screen on the film support. The process is based on a means of impressing a series of microscopic cylindrical lenses into and across the support side of panchromatic film (Figs. 179, 182). A banded three-colour filter is fitted into a holder in front of the lens of the camera and projector. The film is threaded in the camera with the emulsion side away from the lens so that the light, before it reaches the sensitive emulsion, must be transmitted by the tiny embossed lenses, each one of which thus images the bands of the colour filter on the film. If the subject is white, all three colour filters allow light to pass and three lines are exposed under each lens element. If the subject is red, that is if it reflects red light, only the red parts of the filter transmit the light, and the emulsion areas illuminated by this section of the filter will be exposed. With colours that are made up of more than one primary it follows that more than one part of the tricolour filter will transmit the light. Perhaps this may be made a little clearer if only one lens element and one colour of light, say blue, is considered as shown in Fig. 180. Here it is seen that the blue' light exposes an area about one-third that under the lens element (No. 1). On development this area becomes opaque (No. 2). The film is then bleached, and the remaining silver salts are given a controlled exposure (No. 3) and developed up. Now the area affected by the blue light becomes clear and transparent, while the area corresponding to the red and green filter segments is opaque (No. 4). When white light is directed on this single lens section, it passes through the area where the blue light exposed the film; and since the optical system is reversible, it follows that the light will strike the blue segment of the filter and form a blue spot on the screen, since no light reaches either the green or red filter segments. In other words, all the tiny line areas transmit all, part, or no light, according as the subject reflects all, part, or none of the corresponding coloured light. The various colours are recombined on the screen to reproduce the natural colours of the subject photo-graphed.<br />1 The name " Kodacolor " was originally applied to the 16 mm. lenticular process as commercially exploited by Eastman Kodak. The lenticular process is now extinct, and the name was adopted for the negative multilayer roll-film.<br />319</p>
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<div class="et_pb_image_0 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor.tif" target="_blank"><span class="et_pb_image_wrap"><img decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor.tif" alt="16mm Kodacolor" title="Kodacolor" class="wp-image-6247" /></span></a></div>
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<div class="et_pb_image_1 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor3.tif" target="_blank"><span class="et_pb_image_wrap"><img decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor3.tif" alt="Kodacolor copy from screen" title="Kodacolor3" class="wp-image-6248" /></span></a></div>
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<div class="et_pb_text_2 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>16mm Black and White Reversal Kodacolor Film and a frame showing colour</p>
<p>Note the KODACOLOR edge print.</p>
<p>For more information see SMPE Journal Vol 12 Trans 36 1928 P940 <strong><em>Kodacolor Process for Amateur Cinematography</em></strong><em> J G Capstaff and M W Seymour</em></p>
<p> </p>
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<div class="et_pb_image_2 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Lenticular-Colour.jpg" target="_blank"><span class="et_pb_image_wrap"><img fetchpriority="high" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Lenticular-Colour.jpg" alt="35mm Eastman lenticular Film" title="35mm Lenticular Colour" width="803" height="1000" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Lenticular-Colour.jpg 803w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Lenticular-Colour-480x598.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 803px, 100vw" class="wp-image-1466" /></span></a></div>
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<div class="et_pb_image_3 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/CIMG0127-scaled.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/CIMG0127-scaled.jpg" alt="Lenticular film close up through microscope" title="CIMG0127" width="2560" height="1920" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/04/CIMG0127-scaled.jpg 2560w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/CIMG0127-1280x960.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/CIMG0127-980x735.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/CIMG0127-480x360.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 2560px, 100vw" class="wp-image-6244" /></span></a></div>
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<div class="et_pb_text_3 et_pb_text et_pb_bg_layout_light et_clickable et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>35mm Eastman Lenticular Positive film and a microscope image of the lenticular lines.  Fox Lenticular Film below.</p>
<p style="text-align: center;"><strong><span style="color: #ff0000;">Click on images for larger image.</span></strong></p>
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<div class="et_pb_image_4 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Fox-Lenticular-Colour-scaled.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Fox-Lenticular-Colour-scaled.jpg" alt="Fox Lenticular colour" title="Fox Lenticular Colour" width="1558" height="2560" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Fox-Lenticular-Colour-scaled.jpg 1558w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/Fox-Lenticular-Colour-1280x2103.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/Fox-Lenticular-Colour-980x1610.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/Fox-Lenticular-Colour-480x789.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1558px, 100vw" class="wp-image-6251" /></span></a></div>
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<div class="et_pb_text_4 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400; text-align: justify;"><em><strong>A History of Motion Picture Color Technology</strong> </em>Roderick T Ryan The Focal Press London and New York 1977 P51</p>
<p style="font-weight: 400; text-align: justify;"><strong>KELLER—DORIAN COLOR</strong></p>
<p style="font-weight: 400; text-align: justify;">The Keller—Dorian system of color cinematography was a three-color additive system based on the 1909 invention of Rudolph Berthon. This process used a banded three-color filter to expose black and white film through an embossed lenticular base. The first commercial use of the Keller—Dorian system was the Kodacolor process introduced in 1928. The Eastman 16 mm Kodacolor lenticular film was manufactured under the Keller—Dorian patents through a license agreement between Eastman Kodak and Keller—Dorian Companies. In December 1930, the Keller—Dorian Company entered into an agreement with Eastman Kodak Company and Paramount Pictures, Inc., and a research program was begun in an effort to utilize the lenticular process for 35 mm entertainment motion pictures. Considerable effort and money was spent, with only limited success, in an attempt to make the system practical for motion picture release prints. In 1936 Paramount withdrew from the agreement and Kodak directed its primary efforts to the future development of the new Kodachrome color process invented in 1935 (Chapter VII). Some years later, in 1951. the process was revived by Kodak and Twentieth Century- Fox in another attempt to utilize the system for making motion picture release prints (Eastman Embossed Print Film). No prints were made for theatrical release, however, and once more the system was abandoned. With the introduction of color television, the system was revived again in the form of Eastman Embossed Color Kinescope Recording Film, introduced in 1956. This process met with very limited success; however, it was used commercially by the National Broadcasting Company to record several shows. It was finally abandoned after a few years and at the present time there is no commercial use of the lenticular process for color motion pictures.</p>
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<div class="et_pb_image_5 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor-Diagram-copy.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor-Diagram-copy.jpg" alt="Kodacolor Diagram" title="Kodacolor Diagram copy" width="377" height="305" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor-Diagram-copy.jpg 377w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/Kodacolor-Diagram-copy-300x243.jpg 300w" sizes="(max-width: 377px) 100vw, 377px" class="wp-image-6265" /></span></a></div>
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<div class="et_pb_text_5 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>.Agfa produced a  lenticular film 16mm Agfacolor based on the same process as Kodacolor.  See SMPE Journal Vol 20 April 1933 No 4 P301 <strong><em>Optical Photographic Principles of the Agfacolor Process </em></strong>F. Weil</p>
<p>The problems regarding sound on lenticular film is discussed in SMPE Journal Vol 20 Jan 1933 No 1 P60 <em><strong>Sound Remarks on Lenticular Color Film</strong></em>. A P Richard</p>
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		<title>2-Colour Kodachrome</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/2-colour-kodachrome/</link>
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		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Fri, 10 Apr 2026 13:29:58 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
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					<description><![CDATA[]]></description>
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<div class="et_pb_text_11 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p> <span style="text-decoration: underline;"><strong></strong></span></p>
<h5><span style="text-decoration: underline;"><strong>The SMPE Transactions Volume 1</strong> </span></h5>
<h5><span style="text-decoration: underline;"> </span><strong><span style="text-decoration: underline;">MEETING OF NOVEMBER 18-20, 1918 CLEVELAND</span></strong></h5>
<p>J. G. Capstaff, English Patent No. 13,429 of 1915.<em> (See below for the patent pdf.)</em></p>
<p style="text-align: justify;">The silver image is bleached and tanned so that the dye goes into the gelatine in proportion to the amount of silver that was present. A negative gives a negative. So it is necessary to use a positive print in order to obtain a dye positive. This process is known commercially as Kodakchrome.</p>
<p style="text-align: justify;">Note the spelling of the process!</p>
<p style="text-align: center;"><strong><span style="color: #ff0000;">Click on images to see larger image</span></strong></p>
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<div class="et_pb_image_13 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/2-Col-Kodachrome-1.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/2-Col-Kodachrome-1.jpg" alt="2-colour Kodachrome" title="2 Col Kodachrome 1" width="866" height="438" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/04/2-Col-Kodachrome-1.jpg 866w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/2-Col-Kodachrome-1-480x243.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 866px, 100vw" class="wp-image-6195" /></span></a></div>
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<div class="et_pb_text_12 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>John George Capstaff was born in Gateshead, UK on 24th February 1879 and died at the age of 80 on 31st January 1960.  He is buried in Mount Hope Cemetery in San Diago,</p>
<p>He had more than 100 patents whilst working for Eastman Kodak.</p>
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<div class="et_pb_text_13 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6 style="text-align: justify;"></h6>
<h6 style="text-align: justify;"></h6>
<h6 style="text-align: justify;"> Item 1 Capstaff 1915 Patent. - 6 frames of 2 col kodachrome films from the Brian Coe Collection Media Museum,  Bradford.</h6>
<p>Note that the emulsion on each side has been scraped at some stage to reveal colours on last image.  The colours are also visiable on the edges of the frames</p>
<h5 style="text-align: center;">The Patent appears by kind permission of The Director, European Patent Office.</h5>
<p style="text-align: center;"><strong><span style="color: #ff0000;">Click images to see larger image or to view patent</span></strong></p>
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<div class="et_pb_text_15 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: justify;"><em>Colour Cinematography</em> Adrian Cornwell Clyne Chapman and Hall Ltd London ppp 336-337</p>
<p style="text-align: justify;">Kodachrome. (The Earlier Process.)<br />(Eastman Kodak Company.)<br />The name "Kodachrome" was originally used for a two-colour subtractive process worked out by J. G. Capstaff of the Kodak Research Laboratories. This process should not be confused, therefore, with the contemporary Kodachrome film.<br />Camera.-Beam-splitter. Both images were recorded on a single film. Printing. The printing had to be carried out with positives. The first stage was, therefore, to make a set of intermediate master positives. These were made by contact printing from the original negative. A projection printer embodying an elaborate prism mirror system positive bearing the pairs of complementary images.<br />The double-coated film now bearing negative images was developed and bleached; the bleach bath hardened the film only in the parts where the image had been printed. The two sides of the film were then dyed in the usual subtractive complementaries, the dye being absorbed by the gelatine only in the unhardened areas, thus providing positive dye images.</p>
<p style="text-align: justify;">The Kodachrome Bleach Was:</p>
<p>A. Potassium Ferricyanide 37.5gm<br />Potassium Bromide 56.25gm<br />Potassium Dichromate 37.5gm<br />Acetic acid 10cc<br />Water 1000cc</p>
<p>B. Potassium alum, 5 per cent. solution.</p>
<p>A and B were mixed in equal Proporations</p>
<p style="text-align: justify;">The films were fixed after bleaching. The drying was important and had to be as even as possible. Humidity of the film had also considerable bearing on the results; the drier the film the cleaner the highlights and the greater the contrast.<br />J. G. Capstaff patented the making of positives of different gammas by varying the development time. See also Comstock (Technicolor) and Brewster (U.S.P. 1,469,811).<br /><strong>KODACHROME PATENTS</strong><br />E.P. 13,429 (1915) U.S.P. 1,196,080</p>
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		<title>Brewster Colour</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/brewster-colour/</link>
					<comments>https://brianpritchard.com/wp/motion-picture-technology/brewster-colour/#respond</comments>
		
		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Fri, 03 Apr 2026 10:40:08 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=6097</guid>

					<description><![CDATA[Brewster Colour was a two-colour subtractive colour process introduced in 1915.  The process was extensively modified after 1930 and made into a three-colour system]]></description>
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<div class="et_pb_image_20 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewstercolor-3.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewstercolor-3.jpg" alt="Brewstercolor Image" title="Brewstercolor 3" width="1643" height="1050" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewstercolor-3.jpg 1643w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewstercolor-3-1280x818.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewstercolor-3-980x626.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewstercolor-3-480x307.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1643px, 100vw" class="wp-image-1796" /></span></a></div>
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<div class="et_pb_text_17 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Brewster Colour was invented in 1913 by Percy Douglas Brewster</h5>
<p>Brewster colour was a two-color subtractive color process introduced in 1915. For the original photography a red and a green separation negative was exposedi in a beam splitter camera. Prints were made on duplized positive film. The process was extensively modified after 1930 and made into a three-color system.</p>
<p><strong><em>Roderick T Ryan ' Hisrory of Motion Picture Color Technology </em>The Focal Press 1977 p 72-7</strong></p>
<h5 style="font-weight: 400;">Obituary in the SMPTE Journal</h5>
<p style="font-weight: 400;">Percy D. Brewster died on October 27 at his home at East Orange, N.J., after a longillness. He had retired 12 years ago. His work as a motion picture engineer led him tocredit as the inventor of several color photographic processes, with 360 patents grantedto him. He was President of the Brewster Color Film Corp. of Newark, N.J., and of theformer Revelation Film Corp. of London.He became a member of the Society of Motion Picture Engineers in 1929 and was madea Fellow in 1934. He was cited by the Royal Society of London for his work in colorphotography and was the first to make a color photograph of President Wilson. He wasgraduated from Cornell University in 1906.</p>
<p style="font-weight: 400;"><strong>SMPTE Journal Volume 59 December 1952 page 546</strong></p>
<p style="font-weight: 400;">Brewster had a large number of patents in his name.</p>
<p style="font-weight: 400;"><strong>Cornwell-Clyne in Colour Cinematography 3rd Edition 1951 page 11</strong> said:  'The bipack method of obtaining two-colour negatives is traceable again to Ducos du Hauron (FP 250,862, 1895) and A Guertner (BP 7924,1903).  One of the first to apply the bipack system to cinematography seems to have been P. D. Brewster (BP 2465, 1915) and (USP 1,222925, 1917).  He was also the first to use registering pins in cameras and projectors (USP 1,359,024, 1920).</p>
<p style="font-weight: 400;">There is a considerable amount of information on Brewster’s patents, his printing methods and  his cameras in: <strong><em>History of Color Photography</em> Josesph Friedman 1945 The American Publishing Company, Boston USA. </strong></p>
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<div class="et_pb_image_21 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewster-Color-dyes.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewster-Color-dyes.jpg" alt="Brewstercolor showing dyes" title="Brewster Color dyes" width="1606" height="2129" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewster-Color-dyes.jpg 1606w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewster-Color-dyes-1280x1697.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewster-Color-dyes-980x1299.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Brewster-Color-dyes-480x636.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1606px, 100vw" class="wp-image-1794" /></span></a>
<div class="et_pb_image_22 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Brewstercolor-1-scaled.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Brewstercolor-1-scaled.jpg" alt="Brewster Colour" title="Brewstercolor 1" width="781" height="2560" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/04/Brewstercolor-1-scaled.jpg 781w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/Brewstercolor-1-480x1573.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 781px, 100vw" class="wp-image-6234" /></span></a></div>
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<div class="et_pb_text_18 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;"><strong><span style="color: #ff0000;">Click on the images to see larger images</span></strong></p>
<p style="text-align: left;"><span style="color: #000000;">Note the magenta dye at the top of the image and the mixture of cyan and yellow dye at the bottom.  In the image at the top of the page you can see that the yellow image that was printed by imbibition is slightly out of position</span></p>
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<div class="et_pb_text_19 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400; text-align: justify;">A demonstration of three colour Brewster colour was presented April 12, 1935 to a joint meeting of the colour and kinematograph groups of the Royal Photographic Society. Among of the films presented was ‘Let’s look at London “ a film which showed interior and exterior scenes including a ballet performance. Comments regarding the showing were ‘remarkable steadiness‘, ‘extraordinary good reds’. <span> </span>It was believed the lack of sharpness was due to imbibition printing.</p>
<p style="font-weight: 400; text-align: justify;"><strong><em>Roderick T Ryan ' Hisrory of Motion Picture Color Technology The Focal Press 1977 p 72-75</em></strong></p>
<p style="font-weight: 400; text-align: justify;"><strong><em>The Photographic Journal of the Royal Photographic Society August 1935 pages 455 and 456 has the full report of the demostration.  There some extracts below.</em></strong></p>
<p style="font-weight: 400; text-align: justify;"><strong><em></em></strong>Here is a section from:</p>
<p style="font-weight: 400; text-align: justify;"><strong><em>Colour Cinematography 3rd Edition. Adrian Cornw</em></strong><strong><em>ell-Clyne, Chapman and Hall Ltd London 1951 P 411</em></strong></p>
<p style="font-weight: 400; text-align: justify;"><em>Printing-</em>Brewster employed double coated positive film printed on one side with a red filter negative and on the other side with a green filter negative.  The development of these was carried to a low gamma and exposure was light. These two images were converted into silver iodide with basic dyes - a process originally invented by A Traube DRP 187289 1905.  The side printed with a red filter negative was dye toned subtractive primary cyan; the side printed with a green filter negative was dye toned subtractive primary magenta. The remaining yellow component was printed on top of the dye toned image by imbibition from a relief matrix film made in the customary manner by developing with a tanning developer such as Pyro or Pyro and adurol.  The unhardened gelatine was dissolved away with hot water after development. Such a method was elaborate and must have been somewhat difficult to control both as to registration and colour balance.</p>
<p style="font-weight: 400; text-align: justify;"><span>  </span>The following description appeared in 1935.</p>
<p style="font-weight: 400; text-align: justify;">The red and green negative record records are printed onto two sides of a double-coated positive film. <span> </span>The images are bleached out to invisible silver iodide images and are toned with basic dyes to pink and blue. The pink side is <em>then coated with another emulsion,</em> which is exposed to the blue negative record and correspondingly tinted by new process which is not being divulged until further patents have been granted. Basic dyes are said to give an advantage over the acidic acid dyes used by Technicolor.</p>
<p style="font-weight: 400; text-align: justify;"><em>Sic: Adurol: </em><em>a chlorinated (or brominated) derivative of hydroquinone used as a photographic developer.</em></p>
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<div class="et_pb_text_20 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>This image comes from the National Science and Media Museum, the Charles Urban Collection.  The film is stapled to a piece of paper carrying written information.  The sample could not be removed hence the poor quality.  The sample  is a title frame which says  'Carnival with Matheson Lang'</p>
<p>Carnival (1921) starred Matheson Lang, Ivor Novello and Hilde Bayley (INDB)</p>
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<div class="et_pb_image_24 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/04/IMG_1170.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/04/IMG_1170.jpg" alt="Urban’s sample and Note of Brewster Colour" title="IMG_1170" width="1233" height="2266" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/04/IMG_1170.jpg 1233w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/IMG_1170-980x1801.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/04/IMG_1170-480x882.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1233px, 100vw" class="wp-image-6161" /></span></a></div>
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<div class="et_pb_text_21 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">This is a photo of Urban's sample and note saying 'Brewster'.</p>
<p style="text-align: center;"><strong><span style="color: #ff0000;">Click on the images to see larger image.</span></strong></p>
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<div class="et_pb_text_22 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><strong>Some extracts from the Photographic Journal.</strong></p>
<p><strong>The<span>    </span>Camera</strong></p>
<p>The real interest, however, was in the camera, which was patented about 1932. The patent described a <span>beam-splitter </span>inwhich the light from a single lens was divided up inside the camera so that it recorded on three separate films……</p>
<p>… That camera (said Dr. Spencer) was giving quite good service, but the use of the bipacks had several disadvantages, the chief being that the rear image, which was normally the blue printer., was always very slightly woolly, because in front of it was a silver emulsion which was scattering light. … Brewster's suggestion was that the light should be divided up between three separate negatives, each of which should receive light from the whole of the lens. The way in which that was done was to makeuse of metallic mirrors, rather like propellers, disposed at right angles to each other.</p>
<p><strong>The Sound Track.</strong></p>
<p>Some questions were asked with regard to the sound track and it was explained that a fourth printer was not used and so the track had to be either printed in one of the colours or else be a separate silver image.<span>  </span>If they had printed it in all colours so as to get black there would be a risk of the sound going off when the colours ran out of register, so they chose one colour which in most of the shots shown was the magenta</p>
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<div class="et_pb_image_25 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/05/Brewstercolor-6.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/05/Brewstercolor-6.jpg" alt="Brewster Color" title="Brewstercolor 6" width="971" height="947" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/05/Brewstercolor-6.jpg 971w, https://brianpritchard.com/wp/wp-content/uploads/2026/05/Brewstercolor-6-480x468.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 971px, 100vw" class="wp-image-6308" /></span></a></div>

<div class="et_pb_text_23 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Another frame of Brewster Color.  The edge printing says:</p>
<p>EASTMAN KODAK (circle) NITRATE FILM (triangle square circle)</p>
<p>First circle date code denotes US 193</p>
<p class="western">You can see demo reel of two colour Brewster Color here:</p>
<p class="western"><span style="color: #0000ff;"><span lang="zxx"><u><a href="https://archive.org/details/exhibition-reel-of-two-color-film_1929" style="color: #0000ff;" target="_blank" rel="noopener" title="Brewster Color Demo">https://archive.org/details/exhibition-reel-of-two-color-film_1929</a></u></span></span></p>
<p class="western">Here are some articles from US magazines from 1938 detailing  Brewster color in the States</p>
<p class="western"><span style="color: #0000ff;"><strong>Hollywood Spectator Apr-Oct 1938</strong></span></p>
<p class="western"><b>CHEAPER COLOR PROCESS . . .</b>Recently I had the pleasure of witnessing several shorts which displayed Brewster Color, a new and cheaper screen color process. The inventor, Mr. Brewster himself, was kind enough to go to some length to explain the intricacies of the new process, and I must confess that all of it was quite beyond me. My ears perked up, however, when he said that the negative cost was some five times cheaper than that of other color films now on the market. That is im¬ portant. Color, like sound when it first came in, is still somewhat of a cinematic luxury.</p>
<p class="western"><b>Motion Picture Herald May-Jun 1938</b></p>
<p class="western"><b> Color Shown</b></p>
<p class="western">Test reels filmed in a three-color process developed after 10 years of experimentation were shown to the trade press in New York last week by P. D. Brewster, president of Brewster Color Film Corporation of Newark. Advantages claimed for the system are greater definition and depth of field with almost the same lens speed as with ordinary black and white negative and with no requirements for special lighting. Mr. Brewster left for Hollywood immediately after the showing to submit the process to producers and negotiate for the construction of a laboratory on the coast.</p>
<p class="western">T<b>he Film Daily (Apr-Jun 1038)</b></p>
<p class="western"><b>Brewster Co. Demonstrates New 3-Color Film Process</b></p>
<p class="western">Brewster Color Film Corp. of Newark, N. J., yesterday demonstrated its new three-color film process to members of the trade press at screenings in 1600 Broadway. Two films were projected, the first of which was made last December, and the second of which was produced recently. Former's subject matter is composed almost entirely of interior shots, while the latter features out-of-doors locales.</p>
<p class="western">Process is subtractive, and essentially photographic as distinguished from lithographic processes commonly in use, company's president, P. D. Brewster, explained. Pictures, on a positive film, Brewster said, are printed photographically and then developed to form silver images, which are chemically converted into transparent mordant images, and which are then treated with basic dye to form the color images.</p>
<p class="western">A particular advantage claimed for the process by Brewster is that currently it is the only one employing basic dyes, which are capable, he points out, of producnig pictures of purity and brilliance. Stated cost of prints is about five cents per foot.</p>
<p class="western">Company has developed a three color camera in which three separate films are exposed through proper color filters without the use of the bi-pack system.</p>
<p class="western">.Brewster declared he, and company's counsel, Judge John Evans, will leave New York today for Hollywood to demonstrate the process, which has been perfected after 10 years of research and experimentation, to major company there. Latter will be empowered to make test reels with their own stars and production staffs.</p>
<p class="western"><b></b></p>
<p class="western"><b>American Cinematography 1944-05</b></p>
<p class="western"><b>New Company Formed for Color Television</b></p>
<p class="western">Associated Filmakers, Inc., has es¬ tablished a studio on the roof of the Scribner building, New York City, for the production of regular and color tele¬ vision programs. Stanley Neal is presi¬ dent of the company, which will use the English Brewster color process. Neal was formerly managing director of Revelation Films, of London, owner of the Brewster patents.</p>
<p class="western">Two Brewster color cameras will be brought from London and others will be built in New York.</p>
<p class="western"><b>Film Daily Year Book 1938</b></p>
<p class="western">BREWSTER COLOR LAB. HOLDING COMPANIES1 SET FOR WEST COAST</p>
<p class="western">Washington Bureau of THE FILM DAILY</p>
<p class="western">Construction on a new laboratory capable of handling up to 500,000 feet of film weekly will be started by Brewster Color Film Corp. in Hollywood within the next month, P. D. Brewster, president of the company, told The Film Daily Saturday. He also stated that the company was now preparing to make a test short with its newly marketed color process for a major company.</p>
<p class="western">Contract for a series of shorts with this major company, and negotiations for several feature-length pictures depend on the success of the short, Brewster said. He stated that recent tests on the Coast had been "eminently" satisfactory and several major companies were interested in using the process.</p>
<p class="western">Cost for the film is said to run between five and six cents a foot, with the company using specially designed cameras in which three separate color filters are employed without the use of the bi-pack system.</p>
<p class="western">Brewster stated that final phases of deal for financing the laboratory had been successfully negotiated, with formal signing only step left before work is started on the new Coast plant. He would not name the major company he is dealing with, or the director who will make the test short. He expects to use a New York studio for making of the short, with production scheduled to start the latter part of next month, or early August.</p>
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		<title>Why Colour Negatives are Orange</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/__trashed-6/</link>
					<comments>https://brianpritchard.com/wp/motion-picture-technology/__trashed-6/#respond</comments>
		
		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Fri, 27 Mar 2026 16:44:17 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=6105</guid>

					<description><![CDATA[The dyes used in colour films have to satisfy two main criteria; they have to be able to be formed in the colour process from a reaction between the silver halides being developed, the couplers in the emulsion and the colour developing agent in the developer and they have to have certain colour photographic qualities.  Coloured Couplers help satisfy this requirement]]></description>
										<content:encoded><![CDATA[<div class="et_pb_section_17 et_pb_section et_section_regular et_flex_section">
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<div class="et_pb_image_26 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Kodak-LAD-Neg-1.jpg" alt="Kodak LAD Colour Negative" title="Kodak LAD Neg 1" width="805" height="446" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Kodak-LAD-Neg-1.jpg 805w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Kodak-LAD-Neg-1-480x266.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 805px, 100vw" class="wp-image-2321" /></span></div>
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<div class="et_pb_text_24 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h3 style="text-align: center;">Eastman Colour Negative</h3>
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<div class="et_pb_text_25 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400; text-align: justify;">The dyes used in colour films have to satisfy two main criteria; they have to be able to be formed in the colour process from a reaction between the silver halides being developed, the couplers in the emulsion and the colour developing agent in the developer and they have to have certain colour photographic qualities.  The chemical requirements restrict the number of dyes, so less than perfect dyes have to be used. ‘Technicolor’ films were mechanically printed so the dyes could be chosen purely for their photographic qualities, hence the excellent colour of ‘Technicolor’ and their reduced fading; similarly ‘Kodachrome’ films have the dyes introduced during three colour development stages, so again the dye stability and colour quality are better than negative/positive processes.</p>
<p style="font-weight: 400; text-align: justify;">A dye used in colour film should ideally be what is described as narrow-cut.</p>
<p style="font-weight: 400; text-align: justify;">Each of the three dyes used should control only one colour. For example the magenta dye should only control green light and let all of the blue and red light through.  When a dye is controlling colours it should not control, it is called unwanted absorption.</p>
<p style="font-weight: 400; text-align: justify;">The diagrams illustrate the spectrophotometric curves of the dyes in each of the layers. The straight lines show the ideal curve.  The magenta curve shows unwanted control in the blue area, and shows that in the red area the dye is quite acceptable. The cyan dye has unwanted absorption in the green part of the curve. The yellow dye is the best of the three showing less unwanted absorptions.</p>
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<div class="et_pb_image_27 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion4.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion4.jpg" alt="Cyan Layer spectrophotometric curve" title="Unwanted Absorbtion4" width="782" height="522" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion4.jpg 782w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion4-480x320.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 782px, 100vw" class="wp-image-2768" /></span></a></div>
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<div class="et_pb_image_28 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion3.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion3.jpg" alt="Magenta Spectrophotometric curve" title="Unwanted Absorbtion3" width="788" height="530" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion3.jpg 788w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion3-480x323.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 788px, 100vw" class="wp-image-2767" /></span></a></div>

<div class="et_pb_text_26 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;"><strong>Spectrophotometric Curves</strong></p>
<p style="text-align: center;"><span style="color: #ff0000;"><strong>Click on image to see larger image</strong></span></p>
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<div class="et_pb_image_29 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion2.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion2.jpg" alt="Yellow Specrtophotometric Curve" title="Unwanted Absorbtion2" width="798" height="546" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion2.jpg 798w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion2-480x328.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 798px, 100vw" class="wp-image-2766" /></span></a></div>
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<div class="et_pb_column_42 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_27 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400; text-align: justify;">Hansen and Vittum of the Eastman Kodak Company solved this problem, or at least reduced its effect, by introducing coloured couplers.  Two of the layers in the film have coloured couplers, the magenta and the cyan layer, yellow dyes are usually sufficiently narrow cut and in addition a suitably magenta coloured coupler is not available.  These coloured coupler layers are called masks.  The magenta layer transmits some blue light so the coupler is coloured yellow and the cyan layer transmits some green light so is coloured magenta; the combination of magenta and yellow make up the orange colour known as the mask in colour negatives.  Different stocks have different dyes and require different colour masks so each stock has a slightly different coloured mask.</p>
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<div class="et_pb_image_30 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion9.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion9.jpg" alt="Cyan Layer with and without Mask" title="Unwanted Absorbtion9" width="798" height="554" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion9.jpg 798w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion9-480x333.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 798px, 100vw" class="wp-image-2773" /></span></a></div>

<div class="et_pb_text_28 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Cyan layer with and without magenta coloured maskmask</p>
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<div class="et_pb_image_31 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion8.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion8.jpg" alt="Magenta Layer with and without mask" title="Unwanted Absorbtion8" width="790" height="532" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion8.jpg 790w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unwanted-Absorbtion8-480x323.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 790px, 100vw" class="wp-image-2772" /></span></a></div>

<div class="et_pb_text_29 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Magenta layer with and without yellow coloured mask</p>
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<div class="et_pb_column_45 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_30 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400;"> Because the coupler is used to form the dye, the amount of mask will be inversely proportional to the amount of dye formed.  That is, if no dye is present then maximum mask is present and in the areas of maximum dye formation there will be no mask.  The illustration below shows the magenta layer and the yellow mask that is a positive image.</p>
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<div class="et_pb_image_32 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/magenta-layer-and-yellow-mask.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/magenta-layer-and-yellow-mask.jpg" alt="Magenta Layer and Yellow mask" title="magenta layer and yellow mask" width="742" height="540" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/magenta-layer-and-yellow-mask.jpg 742w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/magenta-layer-and-yellow-mask-480x349.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 742px, 100vw" class="wp-image-2376" /></span></a></div>
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<div class="et_pb_row_33 et_pb_row et_flex_row">
<div class="et_pb_column_48 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_31 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="font-weight: 400;">The coloured coupler ensures that the magenta layer is only controlling the green light and the cyan layer is only controlling the red light. </p>
<p style="font-weight: 400;">The control over the light is by varying the amount of dye.  The more magenta dye there is the less green light that can pass, without the coloured coupler the varying amounts of dye would also vary the amount of blue light. Because the coloured coupler is yellow and the amount of coupler left increases as the amount of magenta dye decreases, the blue light transmission remains low.  The magenta mask in the cyan layer reduces the amount of control the cyan dye exerts on the green light.  The coloured couplers ensure that the colours in the print remain as pure as possible. If there was not a yellow mask incorporated with the magenta layer instead of pure green in the picture we would have blue mixed in with it and without the cyan mask the red would be degraded with green.</p>
<p style="font-weight: 400;">The pictures below are the red, green and blue separations from the masked and unmasked magenta and cyan layers.  The masked layers are on the left of each picture.</p>
</div></div>
</div>
</div>
</div>

<div class="et_pb_section_18 et_pb_section et_section_regular et_flex_section">
<div class="et_pb_row_34 et_pb_row et_flex_row">
<div class="et_pb_column_49 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_32 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;"><strong><span style="color: #ff00ff;">Magenta Layer</span></strong></h4>
</div></div>

<div class="et_pb_image_33 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Red-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Red-Sep.jpg" alt="Magenta lLyer Red Separation" title="Magenta Layer Red Sep" width="790" height="532" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Red-Sep.jpg 790w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Red-Sep-480x323.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 790px, 100vw" class="wp-image-2387" /></span></a></div>

<div class="et_pb_text_33 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Red Separation</p>
</div></div>
</div>

<div class="et_pb_column_50 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_34 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;"><strong><span style="color: #33cccc;">Cyan Layer</span></strong></h4>
</div></div>

<div class="et_pb_image_34 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Red-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Red-Sep.jpg" alt="Cyan Layer Red Separation" title="Cyan layer Red Sep" width="798" height="554" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Red-Sep.jpg 798w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Red-Sep-480x333.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 798px, 100vw" class="wp-image-1928" /></span></a></div>

<div class="et_pb_text_35 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Red Separation</p>
</div></div>
</div>

<div class="et_pb_column_51 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_36 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;"></h4>
</div></div>

<div class="et_pb_text_37 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;"><span style="color: #ffff00;"><strong>YELLOW LAYER</strong></span></h4>
</div></div>

<div class="et_pb_image_35 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-red-sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-red-sep.jpg" title="Yellow layer red sep" width="536" height="810" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-red-sep.jpg 536w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-red-sep-480x725.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 536px, 100vw" class="wp-image-2828" /></span></a></div>

<div class="et_pb_text_38 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Red Separation</p>
</div></div>
</div>
</div>

<div class="et_pb_row_35 et_pb_row et_flex_row">
<div class="et_pb_column_52 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_39 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_image_36 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Green-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Green-Sep.jpg" alt="Magenta Layer Green Separation" title="Magenta Layer Green Sep" width="790" height="532" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Green-Sep.jpg 790w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Green-Sep-480x323.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 790px, 100vw" class="wp-image-2382" /></span></a></div>

<div class="et_pb_text_40 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Green Separation</p>
</div></div>
</div>

<div class="et_pb_column_53 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_41 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_image_37 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Green-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-Layer-Green-Layer.jpg" alt="Cyan Layer Green Separation" title="Cyan Layer Green Layer" width="798" height="554" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-Layer-Green-Layer.jpg 798w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-Layer-Green-Layer-480x333.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 798px, 100vw" class="wp-image-1921" /></span></a></div>

<div class="et_pb_text_42 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Green Separation</p>
</div></div>
</div>

<div class="et_pb_column_54 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_43 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;"></h4>
</div></div>

<div class="et_pb_text_44 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_image_38 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Green-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-green-sep.jpg" alt="Yellow Layer Green Separation" title="Yellow layer green sep" width="536" height="810" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-green-sep.jpg 536w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-green-sep-480x725.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 536px, 100vw" class="wp-image-2824" /></span></a></div>

<div class="et_pb_text_45 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Green Separation</p>
</div></div>
</div>
</div>

<div class="et_pb_row_36 et_pb_row et_flex_row">
<div class="et_pb_column_55 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_46 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_image_39 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Blue-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Blue-Sep.jpg" alt="Magenta lLyer Blue Separation" title="Magenta Layer Blue Sep" width="790" height="532" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Blue-Sep.jpg 790w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Magenta-Layer-Blue-Sep-480x323.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 790px, 100vw" class="wp-image-2379" /></span></a></div>

<div class="et_pb_text_47 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Blue Separation</p>
</div></div>
</div>

<div class="et_pb_column_56 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_48 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_image_40 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Blue-Sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Blue-Sep.jpg" alt="Cyan Layer Blue Separation" title="Cyan layer Blue Sep" width="798" height="554" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Blue-Sep.jpg 798w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cyan-layer-Blue-Sep-480x333.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 798px, 100vw" class="wp-image-1920" /></span></a></div>

<div class="et_pb_text_49 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Blue Separation</p>
</div></div>
</div>

<div class="et_pb_column_57 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_50 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;"></h4>
</div></div>

<div class="et_pb_text_51 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_image_41 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-blue-sep.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-blue-sep.jpg" alt="Yellow Layer Blue Separation" title="Yellow layer blue sep" width="536" height="810" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-blue-sep.jpg 536w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Yellow-layer-blue-sep-480x725.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 536px, 100vw" class="wp-image-2822" /></span></a></div>

<div class="et_pb_text_52 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Blue Separation</p>
</div></div>
</div>
</div>
</div>]]></content:encoded>
					
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		<title>Printer Grading Charts</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/printer-grading-charts/</link>
					<comments>https://brianpritchard.com/wp/motion-picture-technology/printer-grading-charts/#respond</comments>
		
		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Sat, 07 Mar 2026 13:19:50 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=5855</guid>

					<description><![CDATA[After a film has been graded it is necessary to comunicate the grading information to the printing machine.  This can be done by mechanical charts, By charts containing Waterhouse stops with and without colour filters, by metal clips,by punch tapes or computer control, CD’s. floppy discs or wifi.]]></description>
										<content:encoded><![CDATA[<div class="et_pb_section_19 et_pb_section et_section_regular et_flex_section">
<div class="et_pb_row_37 et_pb_row et_flex_row">
<div class="et_pb_column_58 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_53 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;">Printer Grading Charts and Bands</h4>
<p>After a film has been graded it is necessary to comunicate the grading information to the printing machine.  This can be done by mechanical charts, By charts containing Waterhouse stops with and without colour filters, by metal clips,by punch tapes or computer control, CD’s. floppy discs or wifi.</p>
</div></div>
</div>
</div>
</div>

<div class="et_pb_section_20 et_pb_section et_section_regular et_flex_section">
<div class="et_pb_row_38 et_pb_row et_flex_row">
<div class="et_pb_column_59 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_42 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-square-hole-Chart.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-square-hole-Chart.jpg" alt="Debrie Grading Chart" title="Debrie square hole Chart" width="902" height="318" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-square-hole-Chart.jpg 902w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-square-hole-Chart-480x169.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 902px, 100vw" class="wp-image-4615" /></span></a></div>
</div>

<div class="et_pb_column_60 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_43 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Colour-Grading.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Colour-Grading.jpg" alt="Debrie Colour Band" title="Debrie Colour Grading" width="2559" height="453" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Colour-Grading.jpg 2559w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Colour-Grading-1280x227.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Colour-Grading-980x173.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Colour-Grading-480x85.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 2559px, 100vw" class="wp-image-4612" /></span></a></div>
</div>

<div class="et_pb_column_61 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_44 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/RGB_Tape.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/RGB_Tape.jpg" alt="Bell and Howell Punch tape" title="RGB_Tape" width="1297" height="739" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/RGB_Tape.jpg 1297w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/RGB_Tape-1280x729.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/RGB_Tape-980x558.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/RGB_Tape-480x273.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1297px, 100vw" class="wp-image-2639" /></span></a></div>
</div>

<div class="et_pb_column_62 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_45 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Chart-Cutter.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Chart-Cutter.jpg" alt="Debrie Chart Cutter" title="Debrie Chart Cutter" width="663" height="499" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Chart-Cutter.jpg 663w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Debrie-Chart-Cutter-480x361.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 663px, 100vw" class="wp-image-4625" /></span></a></div>
</div>

<div class="et_pb_column_63 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_46 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter.jpg" alt="Lawley Clip Inserter" title="Lawley Clip Inserter" width="566" height="600" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter.jpg 566w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter-480x509.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 566px, 100vw" class="wp-image-4622" /></span></a></div>
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<div class="et_pb_column_64 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_47 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/vinten-neg-grading-machine.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/vinten-neg-grading-machine.jpg" alt="Vinten Grading Machine" title="vinten neg grading machine" width="634" height="707" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/vinten-neg-grading-machine.jpg 634w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/vinten-neg-grading-machine-480x535.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 634px, 100vw" class="wp-image-4652" /></span></a></div>
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<div class="et_pb_section_21 et_pb_section et_section_regular et_flex_section">
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<div class="et_pb_text_54 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Debrie Chart</h6>
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<div class="et_pb_text_55 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Colour Grading Chart (Waterhouse Stops)</h6>
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<div class="et_pb_column_67 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_text_56 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Bell and Howell Punch Tape</h6>
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<div class="et_pb_column_68 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_text_57 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Debrie Chart Cutter</h6>
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<div class="et_pb_column_69 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_text_58 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Lawley Clip Inserter</h6>
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<div class="et_pb_column_70 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_text_59 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Vinten Grading Machine and Tape cutter</h6>
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<div class="et_pb_text_60 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;"><span style="color: #ff0000;"><strong>Please click on image to see larger image.</strong></span></h5>
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<div class="et_pb_column_72 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_61 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>In the early days negatives were graded by the printer viewing the negative through a red filter over the outside of the printing aperature as it was exposing the positive stock.  The printer used his judgement to increase or decrease the brightness of the printer light which was a gas flame in the earlest days.  Eventually notches were cut into the side of the negative so that the printer knew when he had to alter he printer light.  For many years the notch cut into the edge of the film was the usual method for triggering grading light changes.  There were two main types of notches, the Bell and Howell notch and the Debrie notch.</p>
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<div class="et_pb_image_48 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Bell-and-Howell-Grading-Notch_small.jpg" alt="Bell and Howell Grading Notch." title="Bell and Howell Grading Notch_small" width="100" height="196" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Bell-and-Howell-Grading-Notch_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1762" /></span>
<div class="et_pb_text_62 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>The Bell and Howell Notch</p>
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<div class="et_pb_image_49 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/BH-Notcher.jpg" alt="Bell and Howell Notcher" title="BH Notcher" width="912" height="583" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/BH-Notcher.jpg 912w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/BH-Notcher-480x307.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 912px, 100vw" class="wp-image-4605" /></span></div>
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<div class="et_pb_column_74 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_12_24 et_flex_column_12_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_50 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/03/notch-for-grading-in-neg.tif" alt="Debrie Notch" title="notch for grading in neg" class="wp-image-5877" /></span></div>

<div class="et_pb_text_63 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>A Debrie Notch was longer than a Bell and Howell Notch, it covered 2 Frames.</p>
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<div class="et_pb_image_51 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/debrie-Notcher.jpg" alt="Debrie Notcher" title="debrie Notcher" width="1038" height="960" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/debrie-Notcher.jpg 1038w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/debrie-Notcher-980x906.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/debrie-Notcher-480x444.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1038px, 100vw" class="wp-image-1948" /></span></div>
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<div class="et_pb_section_24 et_pb_section et_section_regular et_flex_section">
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<div class="et_pb_text_64 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>The notches were used to operate the mechanism that varied the amount of light the grader had specified.  The Bell and Howell printers D and J had a manually operated lever and dial that the printing operator pre-set to the required light value on a grading card.</p>
<p>&nbsp;</p>
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<div class="et_pb_section_25 et_pb_section et_section_regular et_flex_section">
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<div class="et_pb_image_52 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/03/Modle-D-7.jpg" alt="Model D Grading" title="Model D Grading" width="1200" height="1600" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/03/Modle-D-7.jpg 1200w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/Modle-D-7-980x1307.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/Modle-D-7-480x640.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1200px, 100vw" class="wp-image-5879" /></span></div>
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<div class="et_pb_column_77 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_12_24 et_flex_column_12_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_65 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Note the black lines alongside the light value warning the printer operator that the light changes were quick.  Debrie and other printing machine used the Debrie notch to move a chart.  The Waterhouse chart had holes punched in a length of black film leader, the size of the hole gave the amount of exposure to the print film. For colour printing filters could be fixed over the holes.  You can see a sample at the top of the page, click the image to see a larger image.  Debrie also used a system of black film leader with rectangle holes that told the printing machine when a light change should take place. Again there is sample at te top of the page.  It was called a long chart and the one with holes a short chart.</p>
<p>The next innervation was the Lawley clip. This was a nickel-silver staple that was attached to the edge of the film between the perforations.  The clip served two purposes, there were two clips for each light change.  The first clip told the reader on the printing machine when to make the change and the second clip set the value of the printer light. According to the light value the second clip appeared on either side of the film.  The machine for inserting clips is at the top of the page.</p>
<p>The clips had the advantage that the grading information was intregral with the roll of negative, no tape or chart to get lost.  The disadvantage was that if you wanted to make grading alteration you had to remove one or more clips and replace them.  A clip remover is shown below.</p>
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<div class="et_pb_image_53 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/16mm-Lawley-Clip-Inserter.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Declipper_small.jpg" alt="Lawley Declipper" title="Lawley Declipper_small" width="100" height="195" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Declipper_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2350" /></span></a>
<div class="et_pb_text_66 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>A 16mm Lawley clip remover.</h5>
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<div class="et_pb_image_54 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Clip1.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Clip1_small.jpg" alt="Lawley Clip Close-up" title="Lawley Clip1_small" width="100" height="93" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Clip1_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2344" /></span></a>
<div class="et_pb_image_55 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Strip.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Strip_small.jpg" alt="Lawley Nickel Silver Roll" title="Lawley Strip_small" width="100" height="198" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Strip_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2352" /></span></a></div>

<div class="et_pb_text_67 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Close up of a Lawley clip and a box of Nickel Silver metal strip.</h5>
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<div class="et_pb_text_68 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;"><strong><span style="color: #ff0000;">Click on images to see larger image</span></strong></h5>
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<div class="et_pb_text_69 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Next came the punched tape introduced by Bell and Howell for their Model C printers.  The tape had 8 rows of holes that gave the start and end of the tape when it was read by the printing machine reader.  It gave the value of the red, green and blue lights for each scene and finally a value if an automatic fade was required.  If the printing was black and white then the R, G and B lights would be equal.  The Model C had a special light source to be operated by the tape and a built in fader which gradually opened or closed the fader.  For more information on the Model C please see my page on the Model C.  An anotated picture of the tape is at the top of the page.  Because of the possible damage that can be caused to a negative by using notches which can cause tears to the negative the RFQ (Radio Frequency Cue) came into use.  This was a small adhesive aluminium patch that worked exactly as a notch but was electronically used to make a light change.  It made it easier as well as safer if alterations to the grading was necessary.  Removing a patch was easier rather than having ro repair an incorret notch.</p>
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<div class="et_pb_image_56 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/03/RF-Cue-Applicator.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/cueing5_small1.jpg" alt="RFQ. Applicator" title="cueing5_small1" width="100" height="80" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/cueing5_small1.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1912" /></span></a>
<div class="et_pb_text_70 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>RFQ Applicator</h5>
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<div class="et_pb_text_71 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default">
<div class="et_pb_image_57 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/03/RFQ-Patch.tif" target="_blank"><span class="et_pb_image_wrap"><img decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/03/RFQ-Patch.tif" alt="RFQ Patch" title="RFQ Patch" class="wp-image-5887" /></span></a></div>

<div class="et_pb_text_72 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">RFQ Patch</h5>
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<div class="et_pb_text_73 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;"><span style="color: #ff0000;"><strong>Click on images to see larger image</strong></span></h5>
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<div class="et_pb_text_74 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>The introduction of computers led to the use of an entirely new system cueing  Frame Count Cueing, known as FCC. The grader set the computer counting frames from a start mark and recorded the frame count to the first cue and then on for each light change.  There were two different systems for counting ‘Milestone’ where the computer recorded the distance from the start mark to each cue and “Batch" where the computer measured the distance from one cue to the next.</p>
<p>Eventually Punch Tapes were no longer used and firstly Floppy discs were used to feed the information to the printing machine and finally WI-FI was used to send the information.</p>
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<div class="et_pb_image_58 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/FCC_Tape.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/FCC_Tape.jpg" alt="FCC Punch Tape" title="FCC_Tape" width="1083" height="680" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/FCC_Tape.jpg 1083w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/FCC_Tape-980x615.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/FCC_Tape-480x301.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1083px, 100vw" class="wp-image-2063" /></span></a></div>

<div class="et_pb_text_75 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">A  Bell and Howell frame count punch Tape</h5>
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		<title>Sight Grading</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/sight-grading/</link>
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		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Sat, 07 Mar 2026 13:19:36 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=5845</guid>

					<description><![CDATA[Every piece of film that we print needs to have an exposure level so that the resultant printed material is of the correct density.  It must not be too light or too dark.  The process of determining the exposure level we call GRADING in Europe and TIMING in the USA.

Sight grading requires the grader to determine the exposure level by examining the film over a light box using a magnifier.

The one of the advantages of sight grading systems is that it requires very little equipment, just a rewind table with a light box.
The disadvantage of sight grading is that it requires considerable practice, probably a matter of years.

The Printer Point is the basic unit of grading.  The unit used now is the Bell and Howell Printer Point.  The technical definition is that a one-point change is equivalent to altering the exposure by 0.25 Log Exposure.  This means that the amount of light doubles for every twelve-printer points.  

The method by which the grader communicates with the printing machine is called a cue.  As well as telling the Printing machine where we want the light change, we must tell it the value of the exposure or the printing light.  We do this by a band or chart.
We are trying to reproduce, within the limits of the photographic process, the original scene.  There are occasions when the customer does not want an exact reproduction of the original scene.  For example, when a scene is shot Day-for-Night, that is a scene is photographed during the day and needs to look like night.
The shadows are the darkest areas of the scene; they will appear lightest in a negative.  The highlights are the lightest areas in the scenes, the darkest in the negative.  A dark suit would be a good example of a shadow area and a white shirt a highlight area.

Grading is carried out by mentally comparing the scene in front of you with a standard scene that will print at the middle of the printer scale.  Some laboratories have their standard setting at a point below the midpoint of the printer range because the grader is more likely to require high lights for overexposed scenes than low lights for underexposed scenes.  If a scene is underexposed, then the resultant negative will have loss of detail in the shadows.  No matter how low a light you use you can never bring out detail that is not there.  Using a low light will give a print that is washed out and thin without a good black.  Unless we are dealing with a technical film or a newsreel where information from the image is more important than picture quality, we will get a more pleasing result by keeping the blacks black and perhaps sacrificing a little shadow detail.  The cameraman produces day-for-night by deliberately underexposing to lose shadow detail and the grader keeping the print dark.  He must be careful not to include the sun!
The grader must keep his mental image of the standard scene in his mind all the time he is grading.  He also must assume that the control is keeping the printers and process on aim.  It is impossible for a grader to get a good result if he is not sure that a particular light will always give the same result.  
Before we start grading, we must decide which printing machine to use and whether to print the film forwards or backwards.  If the film is single perforated 16mm then we do not have a choice because the film will only run one way on the printer just as in a projector.  35mm can be printed either way.
Which printing machine we use will depend on the type of work we are doing.  That is are we making a negative or a print or a duplicating positive?  In some laboratories different machines are used for different stocks.  The condition of the film will also help us to decide on the appropriate machine.  Some machines cannot handle shrunken films.
We decide on the direction by checking several factors.  We must select the type of cues we are using.  This will depend on the systems available on each printer; some laboratories use only one type of cueing, for example FCC 
If we are using RF Cues and the film is already cued for a backwards run, then it is sensible to print the film backwards.  The condition of the film is also a deciding factor.  If the film is badly shrunken, then we might have to print it forward to avoid the shrunken picture appearing in the soundtrack area.
Most 35mm Printing Machines has adjustable or interchangeable gates usually known as masks.  The usual gate is a five-way gate; full aperture or silent mask, forwards-picture mask, backwards-picture mask, forwards-sound mask and backwards-sound mask.  The grader must specify which mask to use and that depends on what we are printing.
The first light on a film is usually the Academy Leader and often has one or more grey scales or step wedges cut in to it.  Many laboratories have their own wedge that they cut into each film.  This can be measured on a densitometer to ascertain whether the print density is right.  This assumes that the wedge has been given a known standard light. If the process or printer varies then this wedge will be wrong.  It is good practise to always give the leader a standard light even if your laboratory does not use a wedge.
We can now commence to grade the film.  The first scenes are likely to be title or even a censor.  Both are often shot on clear base high contrast film stock.  We must judge the exposure so that the white is white, and the blacks are black.  Because we are dealing with high contrast material the exposure is quite critical.  Too much exposure and the whites will ‘fill-in’ and too little and the blacks will be grey.  A couple of lights less than the mid light should be about right for normally exposed titles.  If they are super-imposed titles, then we also must consider the background. Superimposed titles will be on duplicate negative stock and will have a normal contrast, so we have more latitude.  Duplicate negatives are almost always heavier than a camera negative.  This is because the duplicate negative must produce the same tonal range as a camera negative.  A camera negative is exposed so that the shadows are on the toe of the curve. When a print is made, and the shadows then appear on the shoulder of the print stock the result is a close reproduction of the brightness range of the original scene.  To retain the close reproduction, the duplicates must be printed on the straight-line portion of the curve.
As we make our way through the film, we must examine each scene to determine how much detail we want in the highlights or shadows.  We will always check the scene in several places in case the shot involves a pan or tracking shot and the exposure varies through the shot.  We also keep in mind the previous scene so that we can maintain an even balance through the film. It is often said that you should grade for flesh tones. From a colour viewpoint this might be true but in general you must grade for the highlights and shadows and largely ignore the skin densities.  Obviously, there are shots for example where the director wanted the face in silhouette then we ignore the shadow detail and make sure the face is as the director wanted.  A great difficulty for a grader working in the archive field is that the director’s instructions for grading are no longer available and most likely neither is the director!  We then must interpret the film as we hope the director wanted, although we usually have a client who is going to decide how he wants the film graded.
Once we have completed the grading for the film or reel then we must produce the appropriate bands for it.  We can then send the film to be cleaned and printed.
It is essential for a grader to see as much of his work on the screen as is possible.  He can then learn where he is making errors and to equate his view of the negative over the bench with a picture on the screen.  The only way to become and stay a good grader is to have lots of practice with a continual self-appraisal by viewing as much of your work as possible.
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										<content:encoded><![CDATA[<div class="et_pb_section_31 et_pb_section et_section_regular et_flex_section"></div>

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<div class="et_pb_image_59 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT1.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT1-1.jpg" title="BW LT1" width="1078" height="776" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT1-1.jpg 1078w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT1-1-980x705.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT1-1-480x346.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1078px, 100vw" class="wp-image-5924" alt="Light 1" /></span></a>
<div class="et_pb_text_76 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Light 1</h5>
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<div class="et_pb_image_60 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT5.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT5.jpg" alt="Light 5" title="BW LT5" width="1076" height="796" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT5.jpg 1076w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT5-980x725.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-LT5-480x355.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1076px, 100vw" class="wp-image-5925" /></span></a>
<div class="et_pb_text_77 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Light 5</h5>
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<div class="et_pb_image_61 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-Lt10-1.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-Lt10.jpg" alt="Light 10" title="BW Lt10" width="1078" height="799" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-Lt10.jpg 1078w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-Lt10-980x726.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/03/BW-Lt10-480x356.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1078px, 100vw" class="wp-image-5921" /></span></a>
<div class="et_pb_text_78 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Light 10</h5>
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<div class="et_pb_image_62 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt15.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt15.jpg" alt="Light 15" title="Lt15" width="527" height="399" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt15.jpg 527w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt15-480x363.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 527px, 100vw" class="wp-image-2370" /></span></a>
<div class="et_pb_text_79 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Light 15</h5>
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<div class="et_pb_image_63 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt20.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt20.jpg" alt="Light 20" title="Lt 20" width="541" height="405" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt20.jpg 541w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lt20-480x359.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 541px, 100vw" class="wp-image-2372" /></span></a>
<div class="et_pb_text_80 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Light 20</h5>
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<div class="et_pb_text_81 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;"><strong>BW Prints mage from negative at different lights on a Bell and Howell Model D printer</strong></h5>
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<div class="et_pb_text_82 et_pb_text et_pb_bg_layout_light et_pb_module et_block_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h2 class="wp-block-heading">Sight Grading</h2>
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<div class="et_pb_text_83 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;"><span style="color: #ff0000;"><strong>Please click images to see larger image</strong></span></h5>
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<div class="et_pb_text_84 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><a href="http://www.brianpritchard.com/wp/Printer Grading Charts.html" target="_blank" rel="noopener" title="PRINTER GRADING CHARTS">www.brianpritchard.com/wp/Printer Grading Charts.html</a></p>
<p style="font-weight: 400; text-align: justify;">Every piece of film that we print needs to have an exposure level so that the resultant printed material is of the correct density.<span>  </span>It must not be too light or too dark.<span>  </span>The process of determining the exposure level we call <em>GRADING</em> in Europe and <em>TIMING</em> in the USA.</p>
<p style="font-weight: 400; text-align: justify;">Sight grading requires the grader to determine the exposure level by examining the film over a light box using a magnifier.</p>
<p style="font-weight: 400; text-align: justify;">The one of the advantages of sight grading systems is that it requires very little equipment, just a rewind table with a light box.</p>
<p style="font-weight: 400; text-align: justify;">The disadvantage of sight grading is that it<span> </span>requires considerable practice, probably a matter of years.</p>
<p style="font-weight: 400; text-align: justify;">The Printer Point<span> </span>is the basic unit of grading.<span>  </span>The unit used now is the Bell and Howell<span> </span>Printer Point.<span>  </span>The technical definition is that a one-point change is equivalent to altering the exposure by 0.25 Log Exposure.<span>  </span>This means that the amount of light doubles for every twelve-printer points.<span>  </span></p>
<p style="font-weight: 400; text-align: justify;">The method by which the grader communicates with the printing machine is called a cue.<span>  </span>As well as telling the Printing machine where we want the light change, we must tell it the value of the exposure or the printing light.<span>  </span>We do this by a band or chart.</p>
<p style="font-weight: 400; text-align: justify;">We are trying to reproduce, within the limits of the photographic process, the original scene.<span>  </span>There are occasions when the customer does not want an exact reproduction of the original scene.<span>  </span>For example, when a scene is shot Day-for-Night, that is a scene is photographed during the day and needs to look like night.</p>
<p style="font-weight: 400; text-align: justify;">The shadows are the darkest areas of the scene; they will appear lightest in a negative.<span>  </span>The highlights are the lightest areas in the scenes, the darkest in the negative.<span>  </span>A dark suit would be a good example of a shadow area and a white shirt a highlight area.</p>
<p style="font-weight: 400; text-align: justify;">Grading<span> </span>is carried out by mentally comparing the scene in front of you with a standard scene that will print at the middle of the printer scale.<span>  </span>Some laboratories have their standard setting at a point below the midpoint of the printer range because the grader is more likely to require high lights for overexposed scenes than low lights for underexposed scenes.<span>  </span>If a scene is underexposed, then the resultant negative will have loss of detail in the shadows.<span>  </span>No matter how low a light you use you can never bring out detail that is not there.<span>  </span>Using a low light will give a print that is washed out and thin without a good black.<span>  </span>Unless we are dealing with a technical film or a newsreel where information from the image is more important than picture quality, we will get a more pleasing result by keeping the blacks black and perhaps sacrificing a little shadow detail.<span>  </span>The cameraman produces day-for-night by deliberately underexposing to lose shadow detail and the grader keeping the print dark.<span>  </span>He must be careful not to include the sun!</p>
<p style="font-weight: 400; text-align: justify;">The grader must keep his mental image of the standard scene in his mind all the time he is grading.<span>  </span>He also must assume that the control is keeping the printers and process on aim.<span>  </span>It is impossible for a grader to get a good result if he is not sure that a particular light will always give the same result.<span>  </span></p>
<p style="font-weight: 400; text-align: justify;">Before we start grading, we must decide which printing machine to use and whether to print the film forwards or backwards.<span>  </span>If the film is single perforated 16mm then we do not have a choice because the film will only run one way on the printer just as in a projector.<span>  </span>35mm can be printed either way.</p>
<p style="font-weight: 400; text-align: justify;">Which printing machine we use will depend on the type of work we are doing.<span>  </span>That is are we making a negative or a print or a duplicating positive?<span>  </span>In some laboratories different machines are used for different stocks.<span>  </span>The condition of the film will also help us to decide on the appropriate machine.<span>  </span>Some machines cannot handle shrunken films.</p>
<p style="font-weight: 400; text-align: justify;">We decide on the direction by checking several factors.<span>  </span>We must select the type of cues we are using.<span>  </span>This will depend on the systems available on each printer; some laboratories use only one type of cueing, for example FCC<span> </span></p>
<p style="font-weight: 400; text-align: justify;">If we are using RF Cues and the film is already cued for a backwards run, then it is sensible to print the film backwards.<span>  </span>The condition of the film is also a deciding factor.<span>  </span>If the film is badly shrunken, then we might have to print it forward to avoid the shrunken picture appearing in the soundtrack area.</p>
<p style="font-weight: 400; text-align: justify;">Most 35mm Printing Machines has adjustable or interchangeable gates usually known as masks.<span>  </span>The usual gate is a five-way gate; full aperture or silent mask, forwards-picture mask, backwards-picture mask, forwards-sound mask and backwards-sound mask.<span>  </span>The grader must specify which mask to use and that depends on what we are printing.</p>
<p style="font-weight: 400; text-align: justify;">The first light on a film is usually the Academy Leader<span> </span>and often has one or more grey scales or step wedges cut in to it.<span>  </span>Many laboratories have their own wedge that they cut into each film.<span>  </span>This can be measured on a densitometer to ascertain whether the print density is right.<span>  </span>This assumes that the wedge has been given a known standard light. If the process or printer varies then this wedge will be wrong.<span>  </span>It is good practise to always give the leader a standard light even if your laboratory does not use a wedge.</p>
<p style="font-weight: 400; text-align: justify;">We can now commence to grade the film.<span>  </span>The first scenes are likely to be title or even a censor.<span>  </span>Both are often shot on clear base high contrast film stock.<span>  </span>We must judge the exposure so that the white is white, and the blacks are black.<span>  </span>Because we are dealing with high contrast material the exposure is quite critical.<span>  </span>Too much exposure and the whites will ‘fill-in’ and too little and the blacks will be grey.<span>  </span>A couple of lights less than the mid light should be about right for normally exposed titles.<span>  </span>If they are super-imposed titles, then we also must consider the background. Superimposed<span> </span>titles will be on duplicate negative stock and will have a normal contrast, so we have more latitude.<span>  </span>Duplicate negatives are almost always heavier than a camera negative.<span>  </span>This is because the duplicate negative must produce the same tonal range as a camera negative.<span>  </span>A camera negative is exposed so that the shadows are on the toe of the curve. When a print is made, and the shadows then appear on the shoulder of the print stock the result is a close reproduction of the brightness range of the original scene.<span>  </span>To retain the close reproduction, the duplicates must be printed on the straight-line portion of the curve.</p>
<p style="font-weight: 400; text-align: justify;">As we make our way through the film, we must examine each scene to determine how much detail we want in the highlights or shadows.<span>  </span>We will always check the scene in several places in case the shot involves a pan or tracking shot and the exposure varies through the shot.<span>  </span>We also keep in mind the previous scene so that we can maintain an even balance through the film. It is often said that you should grade for flesh tones. From a colour viewpoint this might be true but in general you must grade for the highlights and shadows and largely ignore the skin densities.<span>  </span>Obviously, there are shots for example where the director wanted the face in silhouette then we ignore the shadow detail and make sure the face is as the director wanted.<span>  </span>A great difficulty for a grader working in the archive field is that the director’s instructions for grading are no longer available and most likely neither is the director!<span>  </span>We then must interpret the film as we hope the director wanted, although we usually have a client who is going to decide how he wants the film graded.</p>
<p style="font-weight: 400; text-align: justify;">Once we have completed the grading for the film or reel then we must produce the appropriate bands for it. <span> </span>We can then send the film to be cleaned and printed. For more information on<strong><span style="color: #0000ff;"><a href="http://www.brianpritchard.com/Printer%20Grading Charts.html" title="Printer Grading Bands" style="color: #0000ff;"> Grading Bands</a></span></strong> please click the link.</p>
<p style="font-weight: 400; text-align: justify;">It is essential for a grader to see as much of his work on the screen as is possible.<span>  </span>He can then learn where he is making errors and to equate his view of the negative over the bench with a picture on the screen.<span>  </span>The only way to become and stay a good grader is to have lots of practice with a continual self-appraisal by viewing as much of your work as possible.</p>
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<div class="et_pb_text_85 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;">Lady Test Frame</h4>
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<div class="et_pb_image_65 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Eastman-Color-China-Lady.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Eastman-Color-China-Lady.jpg" alt="Eastman Color China Lady" title="Eastman Color China Lady" width="826" height="467" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Eastman-Color-China-Lady.jpg 826w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Eastman-Color-China-Lady-480x271.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 826px, 100vw" class="wp-image-2016" /></span></a>
<div class="et_pb_text_87 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h4 style="text-align: center;">China Lady Test Frame</h4>
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<div class="et_pb_image_66 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lady-Pos.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lady-Pos.jpg" alt="Over Duplicated Lady Chart" title="Lady Pos" width="818" height="468" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lady-Pos.jpg 818w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lady-Pos-480x275.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 818px, 100vw" class="wp-image-2331" /></span></a>
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		<title>Early Colour Processes</title>
		<link>https://brianpritchard.com/wp/motion-picture-technology/early-colour-processes/</link>
					<comments>https://brianpritchard.com/wp/motion-picture-technology/early-colour-processes/#respond</comments>
		
		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Fri, 30 Jan 2026 15:05:25 +0000</pubDate>
				<category><![CDATA[Motion Picture Technology]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=5741</guid>

					<description><![CDATA[The search for motion pictures in colour started almost as soon as motion pictures themselves. The first process that actually produced motion picture frames was the Lee Turner process in 1901.  For more information you can click on the links to open more pages on this site.]]></description>
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<div class="et_pb_image_67 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Lee%20Turner%2038mm.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lee-Turner-38mm_small.jpg" alt="Digital reconstruction" title="Lee Turner 38mm_small" width="100" height="77" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lee-Turner-38mm_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2354" /></span></a>
<div class="et_pb_text_89 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><strong><span style="color: #ff0000;">Lee Turner 1901</span></strong></p>
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<div class="et_pb_text_90 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h3 style="text-align: center;">Early Colour Processes</h3>
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<div class="et_pb_text_91 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>The search for motion pictures in colour started almost as soon as motion pictures themselves. The first process that actually produced motion picture frames was the <a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/lee-turner-project/" title="Lee Turner process"><strong><span style="color: #0000ff;">Lee Turner process</span></strong></a> in 1901</h5>
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<div class="et_pb_text_92 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h3><strong>Early</strong></h3>
<h3><strong> <span style="color: #ff0000;">C<span style="color: #008000;">ol<span style="color: #ffff00;">o<span style="color: #ff00ff;">u<span style="color: #00ccff;">r</span></span></span></span></span></strong></h3>
<h3><strong> Systems</strong><span></span></h3>
<p><strong>A powerpoint by Brian Pritchard</strong></p>
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<div class="et_pb_text_93 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><a href="http://www.brianpritchard.com/Early Colour Systems.pdf" target="_blank" rel="noopener" title="Early Colour Systems.pdf"><span style="color: #0000ff;"><strong>Early Colour Systems.pdf</strong> </span></a>  <strong><span style="color: #ff0000;">Please click to run the PDF.</span></strong></p>
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<div class="et_pb_text_94 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5><strong>For more information you can click on the links to open more pages on this site.</strong></h5>
<h5><a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/lee-turner-project/" target="_blank" rel="noopener" title="Lee Turner Project"><span style="color: #0000ff;"><strong>Lee Turner Process</strong></span></a></h5>
<h5><a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/gaumontcolor/" title="Gaumontcolor"><span style="color: #0000ff;"><strong>Gaumontcolor</strong></span></a></h5>
<h5><a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/recreating-kinemacolor-on-the-screen/" title="Kinemacolor"><span style="color: #0000ff;"><strong>Kinemacolor</strong></span></a></h5>
<h5><a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/gasparcolor/" title="Gasparcolor"><span style="color: #0000ff;"><strong>Gasparcolor</strong></span></a></h5>
<h5><a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/dufaycolor/" title="Dufaycolor"><span style="color: #0000ff;"><strong>Dufaycolor</strong></span></a></h5>
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<div class="et_pb_text_95 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><strong><span style="text-decoration: underline;">Some Books on Early Colour Processes:</span></strong></p>
<p><em>'History of Color Photography' </em>Joesph S Friedman Ph D, The American Photographic Publishing Company,  Boston, Mass 1945</p>
<p><em>'History of Motion Picture Color Technology'</em> Roderick Ryan The Focal Press London and New York 1977</p>
<p><em>History of 3 Color Photography </em>E J Wall FCS FRPS, The American Photographic Publishing Company,  Boston 1925</p>
<p><em>Technicolor Movies - The History of Dye Transfer Printing Richard ,W Hughes,</em> McFarland &amp; Co Inc Jefferson, North Carolina &amp; London 1993</p>
<p><em>Photographic Chemistry Vol Two Pierre Glafkides, </em>Translated by Keith M Hornsby, Fountain Press London</p>
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		<title>Strange and Interesting Samples</title>
		<link>https://brianpritchard.com/wp/british-motion-picture-laboratories/strange-and-interesting-samples/</link>
					<comments>https://brianpritchard.com/wp/british-motion-picture-laboratories/strange-and-interesting-samples/#respond</comments>
		
		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Wed, 21 Jan 2026 11:20:00 +0000</pubDate>
				<category><![CDATA[British Motion Picture Laboratories]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=4384</guid>

					<description><![CDATA[Strange and Interesting Samples

Here are some pictures and film samples I have collected over the years, I hope you find them interesting.

See also page 2]]></description>
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<div class="et_pb_text_96 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h3 style="text-align: center;">Strange and Interesting Samples</h3>
<p style="text-align: center;">Here are some pictures and film samples I have collected over the years, I hope you find them interesting.</p>
<p style="text-align: center;"><span style="color: #0000ff;"><a href="https://brianpritchard.com/wp/british-motion-picture-laboratories/strange-and-odd-samples-page-2/" target="_blank" rel="noopener" title="Strange and  Interesting Samples Page 2" style="color: #0000ff;">See also page 2</a></span></p>
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<div class="et_pb_image_68 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/WW2%20Perforator.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/WW2-Perforator_small.jpg" alt="WW2 Perforator" title="WW2 Perforator_small" width="100" height="73" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/WW2-Perforator_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2817" /></span></a></div>

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<div class="et_pb_image_69 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Picture-printed-onto-aluminium-film.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Picture-printed-onto-aluminium-film.jpg" alt="Picture printed on aluminium film base" title="Picture printed onto aluminium film" width="818" height="954" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Picture-printed-onto-aluminium-film.jpg 818w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Picture-printed-onto-aluminium-film-480x560.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 818px, 100vw" class="wp-image-2603" /></span></a></div>

<div class="et_pb_text_98 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 2</h5>
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<div class="et_pb_image_70 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Unknown.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown_small.jpg" alt="Two Colour Print" title="Unknown_small" width="100" height="131" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2763" /></span></a></div>

<div class="et_pb_text_99 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 3</h5>
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<div class="et_pb_image_71 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Biocolor%20Soldier.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Biocolor-Soldier-scaled.jpg" alt="Biocolor Print" title="Biocolor Soldier" width="863" height="2560" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Biocolor-Soldier-scaled.jpg 863w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Biocolor-Soldier-480x1424.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 863px, 100vw" class="wp-image-1767" /></span></a></div>

<div class="et_pb_text_100 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 4</h5>
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<div class="et_pb_image_72 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/FG2.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/FG2_small.jpg" alt="Device for painting frames" title="FG2_small" width="100" height="75" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/FG2_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2068" /></span></a></div>

<div class="et_pb_text_101 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 5</h5>
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<div class="et_pb_image_73 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Unknown%20Comb.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-Comb_small.jpg" alt="two colour digitally combined by Photoshop 7" title="Unknown Comb_small" width="100" height="76" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-Comb_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2757" /></span></a></div>

<div class="et_pb_text_102 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 6</h5>
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<div class="et_pb_image_74 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Highland%201.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Highland-1_small.jpg" alt="Digirl Reconstruction of Biocolor" title="Highland 1_small" width="100" height="77" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Highland-1_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2197" /></span></a></div>

<div class="et_pb_text_103 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 7</h5>
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<div class="et_pb_text_104 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6 style="text-align: justify;"><strong>Item 1</strong></h6>
<h6 style="text-align: justify;"><span>This is a perforating machine. It was owned by the late Tony Scott of Film and Photo. It was  apparently made during World War II.</span></h6>
<h6 style="text-align: justify;"><strong>Item 2 </strong></h6>
<h6 style="text-align: justify;"><span>Picture printed onto aluminium base.</span></h6>
<h6 style="text-align: justify;"><span>This is an article from '<span style="color: #0000ff;"><strong><a href="http://www.brianpritcçhard.comMetal%20Film.jpg" title="Home Movies and Home Talkies June 1939" style="color: #0000ff;">Home Movies and Home Talkies June 1939</a></strong></span></span></h6>
<h6 style="text-align: justify;"><span>The system was patented in 1925 by Robert W Carter here is his patent <span style="color: #0000ff;"><strong><a href="http://www.BrianPritchard.com/CA249966A.pdf" title="Aluminium Film Patent" style="color: #0000ff;">CA249966A</a></strong></span></span></h6>
<h6 style="text-align: justify;"><span>A French PhD thesis by Philippe Rouyer  </span><span style="color: #0000ff;"><strong><a href="http://www.uk-us.fr/agedor.pdf" target="_blank" rel="noopener" title="Philippe Rouyer Thesis" style="color: #0000ff;"> <i>www.uk-us.fr/agedor.pdf</i><i> </i></a></strong></span><span><i>covered the process.</i><i></i></span></h6>
<h6 style="text-align: justify;"><strong><a href="http://www.BrianPritchard.com/Translation.doc" target="_blank" rel="noopener" title="Translation of Thesis"><i>Here is a translation</i></a></strong><span><i> of the section</i><i></i></span></h6>
<h6 style="text-align: justify;"><span><i>kindly provided by Mikael Barnard and Boris Curwen</i><i></i></span></h6>
<h6 style="text-align: justify;">Item 3, 4, 5, 6. 7.</h6>
<h6 style="text-align: justify;"><span>Item 3. This is a piece of two colour additive film. The film is sepia toned and alternate frames coloured red. It is possibly an early test by G Albert Smith, inventor of Kinemacolor. I have recently come across the picture on the right  Item 4 which is Biocolor so the left hand picture is probably a test by Freise-Green and not Smith</span></h6>
<h6 style="text-align: justify;"><span>Item 5. This is a device used by Claude Friese Green to colour film with dye and a paintbrush. Made by William Vinten.</span></h6>
<h6 style="text-align: justify;"><span>Item 6 is a digital composition from Item 1 frames made with Photoshop 7 and  Item 7 is  from Item 4.</span></h6>
<h6 style="text-align: justify;"></h6>
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<div class="et_pb_text_105 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6 style="text-align: justify;"><span>Item 8</span></h6>
<h6><span>A film core made from a wooden cotton reel.</span></h6>
<h6><span>Item 9 </span></h6>
<h6><span>Raycolor from 1929.  Two quarter sized frames on 35mm black and Whtie Negative</span></h6>
<h6><span>Item 10</span></h6>
<h6><span>This is a digital composition from the frames made with Photoshop 7.</span></h6>
<h6><span></span></h6>
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<div class="et_pb_image_75 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Cotton%20Reel%20Core.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cotton-Reel-Core_small.jpg" alt="Core made from Cotton Reel" title="Cotton Reel Core_small" width="100" height="124" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cotton-Reel-Core_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1883" /></span></a></div>

<div class="et_pb_text_106 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 8</h5>
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<div class="et_pb_image_76 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Raycolor.gif" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Raycolor_small.gif" alt="Raycolor Negative" title="Raycolor_small" width="100" height="117" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Raycolor_small.gif 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2623" /></span></a></div>

<div class="et_pb_text_107 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 9</h5>
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<div class="et_pb_image_77 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Raycolor%202%20colour.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Raycolor-2-colour_small.jpg" alt="Digital Reconstruction using Photoshop 7." title="Raycolor 2 colour_small" width="100" height="78" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Raycolor-2-colour_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2621" /></span></a></div>

<div class="et_pb_text_108 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 10</h5>
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<div class="et_pb_text_109 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>

<div class="et_pb_text_110 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: justify;"><span></span></p>
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<div class="et_pb_text_111 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6 style="text-align: justify;"><span>Item 11</span></h6>
<h6 style="text-align: justify;"><span>Polychromide process. Invented by Aron Hamburger.  His 1922 patent GB203358 describes the method of dye-toning. The original negatives were made with a beam-splitter camera. An orthochromatic negative sensitised with erythrosine and a panchromatic negative sensitised with pinacryptol were used. Positive prints were made on duplex stock (emulsion on both sides) the print from the orthochromatic negative was toned with magenta and auramine and on the other side the print from the panchromatic negative was dyed with malachite green and helio safranin.  The film was then bleached, cleared, washed and dried. Further details can be found in 'Colour Cinematography' by Cornwell-Clyne pages 339-341</span></h6>
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<div class="et_pb_image_78 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Polychromide.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Polychromide_small.jpg" alt="Polychromide Film" title="Polychromide_small" width="100" height="129" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Polychromide_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2608" /></span></a></div>

<div class="et_pb_text_112 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 11</h5>
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<div class="et_pb_text_113 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Item 12</h6>
<h6><span>This is a piece of pre-tinted raw stock where the area for the sound track has not been tinted so that the yellow tint does not affect the sound volume.  I believe that this was called 'sunshine' yellow. Eastman introduced this stock in May 1929 and called it 'Clear Track'.</span></h6>
<h6><span>Item 13</span></h6>
<h6><span>A stitched join, the film is joined by sewing the two parts together</span></h6>
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<div class="et_pb_image_79 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Pre-Tinted%20Stock%20without%20sound%20track.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Pre-Tinted-Stock-without-sound-track_small.jpg" alt="Pre-Tinted Rw Stiock" title="Pre-Tinted Stock without sound track_small" width="100" height="108" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Pre-Tinted-Stock-without-sound-track_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2612" /></span></a></div>

<div class="et_pb_text_114 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 12</h5>
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<div class="et_pb_image_80 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Stitched%20Join.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Stitched-Join_small.jpg" alt="Stitched Join" title="Stitched Join_small" width="100" height="70" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Stitched-Join_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2683" /></span></a></div>

<div class="et_pb_text_115 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 13</h5>
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<div class="et_pb_image_81 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/2%20perf.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/2-perf.jpg" alt="2 per double run film" title="2 perf" width="782" height="1094" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/2-perf.jpg 782w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/2-perf-480x672.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 782px, 100vw" class="wp-image-1337" /></span></a></div>

<div class="et_pb_text_117 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 14</h5>
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<div class="et_pb_image_82 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Francitacolor.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Francitacolor.jpg" alt="Francitacolor Negative" title="Francitacolor" width="787" height="650" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Francitacolor.jpg 787w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Francitacolor-480x396.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 787px, 100vw" class="wp-image-2129" /></span></a></div>

<div class="et_pb_text_118 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 15</h5>
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<div class="et_pb_image_83 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Francita-Color.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Francita-Color.jpg" alt="This is a digital composition from the Francitacolor frames made with Photoshop 7." title="acolor" width="239" height="191" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Francita-Color.jpg 239w" sizes="(max-width: 239px) 100vw, 239px" class="wp-image-2127" /></span></a></div>

<div class="et_pb_text_119 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 16</h5>
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<div class="et_pb_text_120 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Item 14</h6>
<h6><span>This sample is an early version of '2 perf' print.  The images are 2 perforations high but alternate images are upside-down.  The film was produced to project first one way showing every other frame through a 2 perf mask in the centre of the normal 35mm academy mask. </span></h6>
<h6><span>The film was then shown from the other end to project the second set of pictures. The two sound tracks correspond to the two sets of pictures.  This all enabled a normal reel of film projected at 24 frames a second to last twice as long.</span></h6>
<h6><span>Item 15</span></h6>
<h6><span>Francitacolor process. Three frames on 35mm width film.  A normal B/W print was projected using a projector with three objectives through red, green and blue filters. The main problem was the usual one with additive systems - lack of picture brightness. A feature was made using this system in France and exhibited in July 1935 in Paris</span></h6>
<h6><span>Item 16</span></h6>
<h6><span>This is a digital composition from the frames made with Photoshop 7.</span></h6>
<h6></h6>
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<div class="et_pb_image_84 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter.jpg" alt="Lawley Clip Inserter" title="Lawley Clip Inserter" width="566" height="600" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter.jpg 566w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/Lasley-Clip-Inserter-480x509.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 566px, 100vw" class="wp-image-4622" /></span></a></div>

<div class="et_pb_text_121 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 17</p>
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<div class="et_pb_image_85 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/EKC-Logo.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/EKC-Logo.jpg" alt="EKC Logo" title="EKC Logo" width="826" height="253" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/EKC-Logo.jpg 826w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/EKC-Logo-480x147.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 826px, 100vw" class="wp-image-2032" /></span></a></div>

<div class="et_pb_text_122 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 18</p>
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<div class="et_pb_column_127 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_86 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Dunning-Color.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Dunning-Color.jpg" alt="Dunningcolor" title="Dunning Color" width="1596" height="1911" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Dunning-Color.jpg 1596w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Dunning-Color-1280x1533.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Dunning-Color-980x1173.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2025/11/Dunning-Color-480x575.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1596px, 100vw" class="wp-image-2010" /></span></a></div>

<div class="et_pb_text_123 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 19</p>
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<div class="et_pb_section_48 et_pb_section et_section_regular et_flex_section">
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<div class="et_pb_column_128 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_124 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6><span>Item 17</span></h6>
<h6><span>16mm Lawley clip inserter.  Lawley clips were nickel-silver staples inserted in the perforations.  The strips were punched from a roll of nickel silver.(</span><span>see below</span><span>)</span></h6>
<h6><span><a href="file:///Users/BrianPritchard_1/Documents/My%20Webs/%20Latest%20Web%2012:12/cueing_methods.htm">Further Information on Lawley clips</a></span></h6>
<h6><span>Item 18</span></h6>
<h6><span>A Kodak logo found on some Ektachrome 16mm print film. It appears to be the EKC logo. I believe that it was printed by Kodak when processing Kodachrome film.</span></h6>
<h6><span>Itm 19</span></h6>
<h6><span>Dunning Colour from </span><span>The National News issued on October 12th</span><span> 1937. There doesn't seem to be much technical information on this process. Dunning Process was an early forerunner of travelling mattes and used for B/W.  The print is single -sided and has an Iron tone blue and an orange dye. Humphries Film Labs carried out Dunning Colour.</span></h6>
<h6></h6>
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<div class="et_pb_section_49 et_pb_section et_section_regular et_flex_section">
<div class="et_pb_row_69 et_pb_row et_flex_row">
<div class="et_pb_column_129 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_87 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Image1small.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image1small_small.jpg" alt="Early Attempt at two colour photography" title="Image1small_small" width="100" height="129" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image1small_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2208" /></span></a>
<div class="et_pb_text_125 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 20.</h5>
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<div class="et_pb_image_88 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Image1%20Comb.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Image1-Comb_small.jpg" alt="Digital Reconstruction using Photoshop 7" title="Image1 Comb_small" width="100" height="77" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Image1-Comb_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-4952" /></span></a>
<div class="et_pb_text_126 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 21</h5>
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<div class="et_pb_image_89 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Image6%20Small.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image6-Small_small.jpg" alt="Two Colour Negative" title="Image6 Small_small" width="100" height="135" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image6-Small_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2217" /></span></a>
<div class="et_pb_text_127 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 22</h5>
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<div class="et_pb_column_132 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_90 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Image6%20Comb.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Image6-Comb_small.jpg" alt="Digital Reconstruction using Photoshop 7" title="Image6 Comb_small" width="100" height="76" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/Image6-Comb_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-4956" /></span></a>
<div class="et_pb_text_128 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 23</h5>
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<div class="et_pb_column_133 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_4_24 et_flex_column_8_24_tablet et_flex_column_12_24_phone">
<div class="et_pb_image_91 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Image2small.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image2small_small.jpg" alt="2 Colour Negative" title="Image2small_small" width="100" height="129" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image2small_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2213" /></span></a>
<div class="et_pb_text_129 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 24</h5>
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<div class="et_pb_image_92 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Image2Comb.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image2Comb_small.jpg" alt="Digital Reconstruction using Photoshop 7." title="Image2Comb_small" width="100" height="78" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Image2Comb_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2211" /></span></a>
<div class="et_pb_text_130 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 25</h5>
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<div class="et_pb_column_135 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_131 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h6>Items 20, 22 and 24</h6>
<h6><span>From a London collection.  It appears to be someone's experiments with two colour.</span></h6>
<h6><span>Items 21, 23 and 25</span></h6>
<h6><span>Digital compositions using Photoshop 7.</span></h6>
<h6><span>Note the fringing caused by time-parallax error.  The objects have moved between the two frames</span></h6>
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<div class="et_pb_column_136 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_12_24 et_flex_column_12_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_93 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/IMG_3583-1.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/IMG_3583-1.jpg" alt="35mm Black and white inted Positive with circular Perforations" title="IMG_3583" width="1691" height="1884" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/IMG_3583-1.jpg 1691w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/IMG_3583-1-1280x1426.jpg 1280w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/IMG_3583-1-980x1092.jpg 980w, https://brianpritchard.com/wp/wp-content/uploads/2026/01/IMG_3583-1-480x535.jpg 480w" sizes="(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1691px, 100vw" class="wp-image-5027" /></span></a>
<div class="et_pb_text_132 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 26</h5>
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<div class="et_pb_image_94 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/17.5mm.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/17.5mm_small.jpg" alt="17.5mm Biocam" title="17.5mm_small" width="100" height="160" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/17.5mm_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1423" /></span></a>
<div class="et_pb_text_133 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 27</h5>
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<div class="et_pb_row_72 et_pb_row et_flex_row">
<div class="et_pb_column_138 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_134 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p> </p>
<p>Item 26</p>
<p>35mm Black and White Tinted Positive  with circular perforation. Queen Victoria's Jubilee 1897</p>
<p>Item 27</p>
<p><span>17.5mm Film Biocam.  These frames come from a comedy film by G A Smith.  The format was around from 1899 to approximately the First World War.</span></p>
<p> </p>
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<div class="et_pb_section_52 et_pb_section et_section_regular et_flex_section">
<div class="et_pb_row_73 et_pb_row et_flex_row">
<div class="et_pb_column_139 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_clickable et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_95 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="https://brianpritchard.com/wp/wp-content/uploads/2026/01/17.5mm-2-centre-perfs.gif" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2026/01/17.5mm-2-centre-perfs.gif" alt="17.5mm Duoscope" title="17.5mm 2 centre perfs" width="393" height="1032" srcset="https://brianpritchard.com/wp/wp-content/uploads/2026/01/17.5mm-2-centre-perfs.gif 393w" sizes="(max-width: 393px) 100vw, 393px" class="wp-image-5690" /></span></a></div>

<div class="et_pb_text_135 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 28</h5>
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<div class="et_pb_column_140 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_136 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>17.5 mm with 2 Central Perforations.  Duoscope introduced in 1912</p>
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<div class="et_pb_section_53 et_pb_section et_section_regular et_flex_section">
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<div class="et_pb_column_141 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_96 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Red%20Sep%20Pos.gif" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Red-Sep-Pos_small.gif" alt="Unknown French Red Separation" title="Red Sep Pos_small" width="100" height="115" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Red-Sep-Pos_small.gif 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2631" /></span></a></div>

<div class="et_pb_text_137 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 29</h5>
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<div class="et_pb_image_97 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Green%20Sep%20Pos.gif" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Green-Sep-Pos_small.gif" alt="French GreebnSeparation" title="Green Sep Pos_small" width="100" height="115" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Green-Sep-Pos_small.gif 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2183" /></span></a>
<div class="et_pb_text_138 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 30</h5>
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<div class="et_pb_column_143 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_8_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_98 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Blue%20Sep%20Pos.gif" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Blue-Sep-Pos_small.gif" alt="French Blue Separation Positive" title="Blue Sep Pos_small" width="100" height="112" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Blue-Sep-Pos_small.gif 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1777" /></span></a>
<div class="et_pb_text_139 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 31</h5>
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<div class="et_pb_image_99 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Unknown%20French%20separations.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-French-separations_small.jpg" alt="Digital Reconstruction using Photoshop 7" title="Unknown French separations_small" width="100" height="111" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-French-separations_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2759" /></span></a>
<div class="et_pb_text_140 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"></div>
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<div class="et_pb_text_141 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 32</h5>
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<div class="et_pb_text_142 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Items 29, 30 and 31</p>
<p><span>Unknown three colour separation tests.  The colours are labelled in French</span></p>
<p><span>Item 32</span></p>
<p style="font-weight: 400;">Digital Reconstruction using Photoshop 7</p>
<p> </p>
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<div class="et_pb_image_100 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Cinerama%201.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cinerama-1_small.jpg" alt="Cinerama Image1" title="Cinerama 1_small" width="100" height="115" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cinerama-1_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1868" /></span></a></div>

<div class="et_pb_text_143 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 33</h5>
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<div class="et_pb_image_101 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Cinerama%202.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cinerama-2_small.jpg" alt="Cinerama 2" title="Cinerama 2_small" width="100" height="116" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cinerama-2_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1870" /></span></a></div>

<div class="et_pb_text_144 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 34</h5>
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<div class="et_pb_image_102 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Cinerama%203.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cinerama-3_small.jpg" alt="Cinerama 3" title="Cinerama 3_small" width="100" height="115" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Cinerama-3_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1872" /></span></a></div>

<div class="et_pb_text_145 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 35</h5>
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<div class="et_pb_text_146 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><span>Three Cinerama Images</span></p>
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<div class="et_pb_column_149 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_image_103 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Two%20Col.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Two-Col_small.jpg" alt="Technicolor ‘Gold Diggers of Broadway’ 1929" title="Two Col_small" width="100" height="95" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Two-Col_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2744" /></span></a></div>

<div class="et_pb_text_147 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 36</h5>
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<div class="et_pb_column_150 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone">
<div class="et_pb_text_148 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p><span>This is two colour Technicolor, you can see traces of the orange/red and green images on the edges of the frames. I have been informed  by Nicolay Sharkanov that this frame comes from   "Gold diggers of Broadway" (1929) and Winnie Lightner and Albert Gran appear in the frame.</span></p>
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<div class="et_pb_image_104 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/35mm%20Unknown%20Sound%20Track%201927.gif" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Unknown-Sound-Track-1927_small.gif" alt="35mm Full Width Unknown Sound Track 1927" title="35mm Unknown Sound Track 1927_small" width="100" height="31" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Unknown-Sound-Track-1927_small.gif 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1467" /></span></a></div>

<div class="et_pb_text_149 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 37</h5>
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<div class="et_pb_image_105 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/dascolor.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/dascolor_small.jpg" alt="35mm Dascolor frame" title="dascolor_small" width="100" height="52" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/dascolor_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1933" /></span></a>
<div class="et_pb_text_150 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 38</h5>
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<div class="et_pb_image_106 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/35mm%20Lenticular%20Colour.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Lenticular-Colour_small.jpg" alt="35mm Kodak Lenticular Colour" title="35mm Lenticular Colour_small" width="100" height="124" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/35mm-Lenticular-Colour_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1465" /></span></a></div>

<div class="et_pb_text_151 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 39</h5>
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<div class="et_pb_image_107 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Automatic.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Automatic_small.jpg" alt="Automatic Barnes Can Label" title="Automatic_small" width="100" height="104" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Automatic_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1740" /></span></a></div>

<div class="et_pb_text_152 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 40</h5>
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<div class="et_pb_image_108 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Unknown%20Red%20painted%20Neg.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-Red-painted-Neg_small1.jpg" alt="Black and White Negative with alternate frames painted red." title="Unknown Red painted Neg_small1" width="100" height="215" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-Red-painted-Neg_small1.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2761" /></span></a></div>

<div class="et_pb_text_153 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 41</h5>
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<div class="et_pb_image_109 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Unknown.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown_small1.jpg" alt="Positive of Unknown Red Painted Neg." title="Unknown_small1" width="100" height="58" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown_small1.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2764" /></span></a></div>

<div class="et_pb_text_154 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 42</h5>
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<div class="et_pb_image_110 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/UA%20Reel%20Centre%201.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/UA-Reel-Centre-1_small.jpg" alt="United Artists Reel Centre" title="UA Reel Centre 1_small" width="100" height="104" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/UA-Reel-Centre-1_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2746" /></span></a></div>

<div class="et_pb_text_155 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5>Item 43</h5>
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<div class="et_pb_section_59 et_pb_section et_section_regular et_flex_section et_clickable">
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<div class="et_pb_text_157 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: justify;">Item 37</p>
<p style="text-align: justify;"><span>Early sound recording.  The date code on the film is UK 1927, it is 35mm nitrate film.</span></p>
<p style="text-align: justify;"><span>Item 38</span></p>
<p style="text-align: justify;"><span>This is a sample of Dascolor, It was a 2 colour duplex process, emulsion on both sides.  One emulsion was toned with Iron Ferricyanide and the other toned with an orange dye.  You can see traces of the orange dye in the perforations</span></p>
<p>Item 39</p>
<p><span>35mm Kodak Lenticular Color print.  The base had moulded lenses to split the light which was then projected through three colour filters.  The same process was used for16mm  Kodacolor Lenticular film.</span></p>
<p><span>Item </span>40</p>
<p><span>This is a can label from Automatic (Barnes 1932) it was from a Dufaycolor sound neg of a film called 'Dawn'</span></p>
<p><span>Item 41 and 42</span></p>
<p><span>This is a piece of B/W Negative that has been coloured red on alternate frames.  I  wondered if it was painted before exposure but it would have been difficult to ensure it was in rack in the camera and could have washed off in processing. As an experiment I decided to combine the images using Photoshop, the red image in the red channel and the plain image in the blue and green channels.  The image was inverted and adjusted for brightness and contrast.  This is the result.</span></p>
<p><span>Item 43</span></p>
<p><span>A wooden reel centre from United Artists.  Note there is no hole through the centre</span></p>
<p><span></span></p>
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<div class="et_pb_image_111 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/2%20and%20a%20quarter%20film%20+%2035mm%20film.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/2-and-a-quarter-film-35mm-film_small1.jpg" alt="2 and 1/4” Film and 35mm Film" title="2 and a quarter film + 35mm film_small1" width="100" height="34" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/2-and-a-quarter-film-35mm-film_small1.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1334" /></span></a></div>

<div class="et_pb_text_158 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 44</h5>
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<div class="et_pb_image_112 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/IMG_1188.JPG" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/IMG_1188_small.jpg" alt="Two colour film from NMM Bradford" title="IMG_1188_small" width="100" height="181" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/IMG_1188_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2240" /></span></a></div>

<div class="et_pb_text_159 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 45</h5>
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<div class="et_pb_image_113 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Unknown%202.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-2_small.jpg" alt="Digital Reconstruction using Photoshop 7" title="Unknown 2_small" width="100" height="106" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Unknown-2_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2753" /></span></a>
<div class="et_pb_text_160 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 46</h5>
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<div class="et_pb_image_114 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/IMG_0068A" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/IMG_0068A_small.jpg" alt="1” wide film with 3 sets of perfs" title="IMG_0068A_small" width="100" height="113" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/IMG_0068A_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2224" /></span></a>
<div class="et_pb_text_161 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 47</h5>
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<div class="et_pb_image_115 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Lawley%20Strip.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Strip_small.jpg" alt="Lawley Nickel Silver Roll" title="Lawley Strip_small" width="100" height="198" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Lawley-Strip_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2352" /></span></a>
<div class="et_pb_text_162 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 48</h5>
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<div class="et_pb_image_116 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Technicolor%20Matrix%20Leader.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Technicolor-Matrix-Leader_small.jpg" alt="Technicolor Matrix Leader" title="Technicolor Matrix Leader_small" width="100" height="28" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Technicolor-Matrix-Leader_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2713" /></span></a></div>

<div class="et_pb_text_163 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;">Item 49</h5>
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<div class="et_pb_text_164 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Item 44. 2 3/8 inch film and a 35mm film for comparison.  It was shot by the Bioscope Co of the Corbett-Fitzsimmons Boxing match on 17th March 1897.</p>
<p>Item 45 A 2 colour (Red and Green Tinted ) 17.5mm </p>
<p>Item 46 a Photoshop 7 Digital reconstruction from Item 45</p>
<p>Item 47 is a piece of film from the Edison Home Kinetoscope</p>
<p>Item 48 A box of Lawley nickle silver strip for making Lawley Clips</p>
<p>Item 49 A Technicolor Matrix Joining Clip.</p>
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		<title>Kodak Year Symbols used on Products with 8mm Perforations</title>
		<link>https://brianpritchard.com/wp/british-motion-picture-laboratories/kodak-year-symbols-used-on-products-with-8mm-perforations/</link>
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		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Wed, 21 Jan 2026 09:13:48 +0000</pubDate>
				<category><![CDATA[British Motion Picture Laboratories]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=5643</guid>

					<description><![CDATA[Year symbols used on Kodak products with 8mm perforations up to 31 December 1964]]></description>
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<div class="et_pb_text_165 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h3 style="text-align: center;">Kodak Year Symbols Used on Products with 8mm Perforations</h3>
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<div class="et_pb_text_166 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;"><span><b>Year symbols used on products with 8mm perforations up to 31 </b></span><span><b>December 1964</b></span></p>
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<div class="et_pb_image_117 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/8mm-datecode.jpg" alt="8mm Datecodes for UK" title="8mm datecode" width="194" height="273" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/8mm-datecode.jpg 194w" sizes="(max-width: 194px) 100vw, 194px" class="wp-image-1372" /></span></div>
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<div class="et_pb_text_167 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: center;"><span><b>Information on 8mm date codes for Kodak Park and Kodak Ltd 1932-1941</b></span></h5>
<p style="text-align: center;"><span style="color: #ff0000;"><b>Please click images to see larger image</b></span></p>
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<div class="et_pb_image_118 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Cine8a.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/12/Cine8a_small.jpg" alt="Kodak Park Date Codes 2" title="Cine8a_small" width="100" height="147" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/12/Cine8a_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-3686" /></span></a></div>
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<div class="et_pb_image_119 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Cine8b.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/12/Cine8b_small.jpg" alt="Kodak Park 8mm Date Codes" title="Cine8b_small" width="100" height="96" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/12/Cine8b_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-3688" /></span></a></div>
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		<title>Some Early Directory Entries</title>
		<link>https://brianpritchard.com/wp/british-motion-picture-laboratories/some-early-directory-entries/</link>
					<comments>https://brianpritchard.com/wp/british-motion-picture-laboratories/some-early-directory-entries/#respond</comments>
		
		<dc:creator><![CDATA[Brian Pritchard]]></dc:creator>
		<pubDate>Tue, 20 Jan 2026 20:39:54 +0000</pubDate>
				<category><![CDATA[British Motion Picture Laboratories]]></category>
		<guid isPermaLink="false">https://brianpritchard.com/wp/?p=5603</guid>

					<description><![CDATA[Some Early Directory Entries For Motion Picture  Companies]]></description>
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<div class="et_pb_text_168 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h3 style="text-align: center;">Some Early Directory Entries</h3>
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<div class="et_pb_image_120 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Kelly&#039;s%20Herts%201894.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Kellys-Herts-1894_small.jpg" alt="Kelly&#039;s Herts 1894 Directory Entry" title="Kelly&#039;s Herts 1894_small" width="100" height="13" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Kellys-Herts-1894_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2265" /></span></a>
<div class="et_pb_text_169 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 1</p>
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<div class="et_pb_image_121 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Hertfordshire%20Directory%201899.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Hertfordshire-Directory-1899_small.jpg" alt="Hertfordshire Directory 1899" title="Hertfordshire Directory 1899_small" width="100" height="31" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Hertfordshire-Directory-1899_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2193" /></span></a></div>

<div class="et_pb_text_170 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 2</p>
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<div class="et_pb_image_122 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/London%201899.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/London-1899_small.jpg" alt="London Directory 1899" title="London 1899_small" width="100" height="65" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/London-1899_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2362" /></span></a>
<div class="et_pb_text_171 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 3</p>
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<div class="et_pb_image_123 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Sussex%201905%20A.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Sussex-1905-A_small.jpg" alt="Sussex 1905 Directory Entry" title="Sussex 1905 A_small" width="100" height="27" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Sussex-1905-A_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2691" /></span></a></div>

<div class="et_pb_text_172 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 4</p>
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<div class="et_pb_image_124 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Sussex%201905.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Sussex-1905_small.jpg" alt="Sussex 1905 Directory Entry" title="Sussex 1905_small" width="100" height="15" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Sussex-1905_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2693" /></span></a></div>

<div class="et_pb_text_173 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 5</p>
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<div class="et_pb_image_125 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/Sussex%201911.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Sussex-1911_small.jpg" alt="Sussex 1911 Directory Entry" title="Sussex 1911_small" width="100" height="30" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/Sussex-1911_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-2695" /></span></a></div>

<div class="et_pb_text_174 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;">Item 6</p>
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<div class="et_pb_image_126 et_pb_image et_pb_module et_flex_module preset--module--divi-image--default"><a href="http://www.brianpritchard.com/1915%20Wardour%20Street%20Directory.jpg" target="_blank"><span class="et_pb_image_wrap"><img loading="lazy" decoding="async" src="https://brianpritchard.com/wp/wp-content/uploads/2025/11/1915-Wardour-Street-Directory_small.jpg" alt="1915 Wardour Street Directory Entry" title="1915 Wardour Street Directory_small" width="100" height="90" srcset="https://brianpritchard.com/wp/wp-content/uploads/2025/11/1915-Wardour-Street-Directory_small.jpg 100w" sizes="(max-width: 100px) 100vw, 100px" class="wp-image-1538" /></span></a></div>

<div class="et_pb_text_175 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p>Item 7</p>
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<div class="et_pb_text_176 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><p style="text-align: center;"><strong><span style="color: #ff0000;">Please click images above to see larger image</span></strong></p>
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<div class="et_pb_text_177 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default"><div class="et_pb_text_inner"><h5 style="text-align: left;"><span>1. Kelly's Herts 1894   </span></h5>
<h5 style="text-align: left;"><span>2. Herts 1899</span></h5>
<h5 style="text-align: left;"><span>3. London 1899</span></h5>
<h5 style="text-align: left;"><span>4. Sussex 1905</span></h5>
<h5 style="text-align: left;"><span>5. Sussex 19056. </span></h5>
<h5>6. Sussex 1911</h5>
<h5 style="text-align: left;"><span>7. Wardour Street 1915</span></h5>
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