Process for forming direct positive images, direct positive silv

Details Process for forming direct positive images, direct positive silv Process for forming direct positive images, direct positive silv

1985-07-15

1987-01-13

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

Process using lithographic infectious developer

430378, 430375, 430505, 430264, 430406, 430940, 430409, 430410, 430598, 430564, 544198, 544284, 544207, 544324, 544256, G03C 524

Patent

active

046364579

ABSTRACT:
Direct positive photographic elements are disclosed employing internal latent image silver halide emulsions associated with developer autoxidation promoter agents constituted by 5 or 6 membered nucleus-containing heterocyclic compounds comprising an azomethine group, whose methine group is substituted with a 5-amino-1,2,4-triazolyl group, and/or copper complex compounds thereof.
Preferably said direct positive photographic elements are multi-layer elements comprising internal latent image type type silver halide emulsion layers sensitized to different regions of the visible light and associated with image-dye providing compounds (photographic color couplers).

REFERENCES:
patent: 4115122 (1978-09-01), Adachi et al.
patent: 4278748 (1981-07-01), Sidhu et al.

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