Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1995-02-15

1998-07-14

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430222, 430223, 430502, 430506, 430509, 430544, 430566, 430572, 430598, 430957, G03C 106

Patent

active

057801983

ABSTRACT:
A silver halide photographic material comprising a plurality of light-sensitive silver halide emulsion layers, wherein (A) at least one of the layers contains a hydrazine nucleating agent represented by formula (II): ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a hydrazine group, a carbamoyl group, or an oxycarbonyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, ##STR2## a thiocarbonyl group, or an iminomethylene group; and A.sub.3 and A.sub.4 each represents a hydrogen atom, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, or a substituted or unsubstituted acyl group, provided that at least one of A.sub.3 and A.sub.4 is a hydrogen atom; and (B) another layer contains a redox compound capable of releasing a development inhibitor when the redox compound is oxidized. The photographic material can be processed with a highly stable developing solution and provides an ultrahigh contrast image with broad dot gradation.

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patent: 5230983 (1993-07-01), Inoue et al.
patent: 5395732 (1995-03-01), Katoh et al.
Unexamined Published Japanese Patent Application No SHO-64-72140 (Partial Translation).
European Search Report English Abstract of JP-A-1-72140.

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