Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1985-01-09
1986-01-21
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430392, 430393, 430431, 430462, G03C 732
Patent
active
045657750
ABSTRACT:
In a process for the production of photographic images by the silver dye bleach process, a photograph material is used which, on a base, comprises at least one silver halide-free gelatin layer, which contains a diffusion-resistant bleachable image dye, the gelatin/dye ratio being at most 10:1, and a silver halide emulsion layer which is arranged directly on top of the former layer on the side facing the light source and is free of image dye, and the exposed material is processed in a dye and silver bleach bath which contains a combination of oxidizing agents of the formula (1a) with bleach catalysts of the formulae (2a) and (3), or of the oxidizing agent of the formula (1b) with bleach catalysts of the formula (2b).
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patent: 4404273 (1983-09-01), Forte et al.
Brown J. Travis
Ciba-Geigy AG
Kolodny Joseph G.
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