EP0420005A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
high contrast silver halide photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1990-09-18
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Granted: —
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Expires: 2010-09-18
Abstract
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): wherein R 1 represents an aliphatic group or an aromatic group; R 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; Gi represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, a thiocarbonyl group, or an iminomethylene group; and A3 and A4 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 A3 and A4 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.
Inventors
- 👤 Takahiro Fuji Photo Film Co. Ltd. Goto
- 👤 Kazunobu Fuji Photo Film Co. Ltd. Katoh
- 👤 Minoru Fuji Photo Film Co. Ltd. Sakai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 21:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C1/061; G03C1/46; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A silver halide photographic material comprising a plurality of light-sensitive silver halide emulsion layers, wherein (A) at least one of said layers contains a hydrazine nucleating agent represented by formula (II): wherein R, represents an aliphatic group or an aromatic group; R 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, represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, a thiocarbonyl group, or an iminomethylene group; and A3 and A4 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 A3 and At is a hydrogen atom, and (B) another layer contains a redox compound capable of releasing a development inhibitor when said redox compound is oxidized.
Claim 2
Dependent Claim
154 words
A silver halide photographic material comprising a plurality of light-sensitive silver halide emulsion layers, wherein (A) at least one of said layers contains a hydrazine nucleating agent represented by formula (II): wherein R, represents an aliphatic group or an aromatic group; R 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, represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, a thiocarbonyl group, or an iminomethylene group; and A3 and A4 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 A3 and At is a hydrogen atom, and (B) another layer contains a redox compound capable of releasing a development inhibitor when said redox compound is oxidized.
Claim 3
Dependent Claim
119 words
A silver halide photographic material as claimed in Claim 1, wherein said redox compound is represented by formula (I): wherein A, and A 2 each represents a hydrogen atom, a sulfinic acid residue, wherein R o represents an alkyl group, an alkenyl group, an aryl group, an alkoxy group, or an aryloxy group; and ℓ represents 1 or 2, or an unsubstituted acyl group; PUG represents a residue of a development inhibitor; and V represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, wherein R, represents an alkoxy group, an aryloxy group, or an amino group, an iminomethylene group. or a thiocarbonyl group; R represents an aliphatic group, an aromatic group, or a heterocyclic group.
Claim 4
Dependent Claim
39 words
A silver halide photographic material as claimed in Claim 1. wherein said redox compound is present in an amount of from about 1.0 x 10- 7 to 1.0 x 10- 3 mol per m 2 of said photographic material.
Claim 5
Dependent Claim
35 words
A silver halide photographic material as claimed in Claim 1, wherein a layer other than said silver halide emulsion layer containing said hydrazine nucleating agent contains a quinone trapping agent or an ascorbic acid compound.
Claim 6
Dependent Claim
42 words
A silver halide photographic material as claimed in Claim 4, wherein (A) a first light-sensitive silver halide emulsion layer contains said hydrazine nucleating agent, and (B) a second light-sensitive silver halide emulsion layer or a light-insensitive layer contains said quinone trapping agent.
Claim 7
Dependent Claim
44 words
A silver halide photographic material as claimed in Claim 4, wherein (A) a first light-sensitive silver halide emulsion layer contains said hydrazine nucleating agent, and (B) a second light-sensitive emulsion layer contains said redox compound and said quinone trapping agent or ascorbic acid compound.
Claim 8
Dependent Claim
50 words
A silver halide photographic material as claimed in Claim 4, wherein (A) a first light-sensitive silver halide emulsion layer contains said hydrazine nucleating agent, (B) a second light-sensitive silver halide emulsion layer contains said quinone trapping agent or ascorbic acid compound, and (C) A light-insensitive layer contains said redox compound.
Claim 9
Dependent Claim
66 words
A silver halide photographic material as claimed in Claim 4, wherein (A) a first light-sensitive silver halide emulsion layer contains said hydrazine nucleating agent; (B) a second light-sensitive silver halide emulsion layer contains the redox compound, and (C) a light-insensitive layer positioned between said first light-sensitive silver halide emulsion layer and said second light-sensitive emulsion layer contains said quinone trapping agent or said ascorbic acid compound.
References Cited (Backward Citations)
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