G - Physics – 03 – C
Patent
G - Physics
03
C
96/207, 96/273,
G03C 7/00 (2006.01)
Patent
CA 1142014
Case 8-11402/ILF 1162/+/K Canada Process for producing photographic images Abstract of the Disclosure A new method to produce photographic images is provided which comprises (a) imagewise exposing a photographic assembly which con- tains at least during the silver halide developing step, in order optionally a supercoat layer, at least one silver halide emulsion layer, a layer containing a modifiable image substance and a photobase, there being optionally one or more interlayers between each of said components. (b) treating the exposed photographic assembly with an aqueous processing bath 80 as to provide in the silver halide emulsion layer or layers a solution or dispersion of an image substance modifying/silver halide developing compound (dymodev compound), thereby to develop the latent silver image in the silver halide emulsion(s), and (c) in the non-latent image areas allowing the dymodev comp compound to diffuse in a counter-imagewise manner from the silver halide emulsion layer (s) to the layer containing the modifiable image substance and there to modify reductively the image substance. Depending on the dymodev compound and modifiable im- age substance combination closen it is possible to obtain either a negative or a positive image,
315741
Chylewski Christoph
Cook Robert S.
Kilcast David
Mason Leslie F.a.
Schellenberg Matthias
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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