A three colour subtractive reversal print stock. It appeared in 1934 and was the first three layer colour film that could be processed with minor modifications to contemporary laboratory techniques. It did not require toning, colour development or use of dyes during processing. It used pre-dyed emulsions and dye bleaching.
An illustrated description of the way the processed worked is available as a pdf file. GASPARCOLOR.pdf
Bela Gaspar who invented this system had a number of patents to his credit:
GB415040: GB446392: GB480854: GB483366A
The film had to be shot as three colour separations. Here is a piece of test film Red Box Film. Two Gasparcolor frames are also below
Digital Reconstruction of
Gaspar Test Negative below
Gasparcolor frame
Gasparcolor Frame
Gaspar separation test negative red, green
and blue on succsesive Frames
The above pictures are of Dr Dreyfuss and his daughter Judy Navon-Dreyfuss who kindly supplied these Gasparcolor prints. De Dreyfuss worked for Bela Gaspar in his Gasparcolor Lab in Hollywood and before that in his lab in Brussels, Belgium and afterrwards for Ciba Basel assisting in the researc of Cibachrome.
