Photographic colour material for diffusion transfer...

Details Photographic colour material for diffusion transfer... Photographic colour material for diffusion transfer...

G - Physics

03

C

96/194, 96/32

G03C 1/46 (2006.01) G03C 8/08 (2006.01)

Patent

CA 1176899

Abstract Photographic silver halide colour materials and process for the production of dye images by diffusion transfer Photographic material and process suitable for producing by diffusion transfer a colour image and comprising on a support at least two differently spectrally sensitive negative working silver halide emulsion layers (Fig. 3, layers 12, 14 and 16) and having operatively associated with each of said emulsion layers a different non-diffusing dye providing compound that is initially immobile in an alkali-permeable colloid medium and wherefrom by reduction in alkaline medium a dye or dye precursor can be split off in diffusible state, wherein at least one of said negative working silver halide emulsion layers is associated in water-permeable relationship with a visible light-sensitive direct-positive emulsion layer (Fig. 3, layers 13 and 15) whereby interimage effects can be obtained. GV.1146

397352

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