Contrast-promoting agents in graphic arts media

Details Contrast-promoting agents in graphic arts media Contrast-promoting agents in graphic arts media

1994-05-24

1995-05-16

Neville, Thomas R.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430598, 430600, 430613, G03C 106

Patent

active

054159750

ABSTRACT:
A silver halide photographic emulsion comprising a hydrophilic colloid binder, negative-acting silver halide grains, a hydrazine, and a contrast-promoting amount of a compound selected from the group consisting of 3-indazolinones, 4(3H)-pyrimidones, urazoles, 2-pyrazolin-5-ones, and 3-pyrazolin-5-ones.

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