System for the production of dot-etched lithographic films

Details System for the production of dot-etched lithographic films System for the production of dot-etched lithographic films

1988-08-18

1990-11-27

Dees, Jose

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430302, 430310, G03C 106

Patent

active

049735438

ABSTRACT:
A system for the preparation of dot etched lithographic films, consisting essentially of a light sensitive silver halide material for tanning development and an etching solution, in which system the light sensitive material of various layers contains at least one colorant, e.g., pigment or dye with acid groups, which is stable in the processing baths and forms with bases salts soluble in organic solvents, and the etching solution contains a base that ionizes the colorant, and a solvent for the resulting ion pair.

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