Patent EP0286840A1 successfully refreshed from Google Patents.
EP0286840A1
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Silver halide photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1988-03-11
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Granted: —
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Expires: 2008-03-11
Abstract
Abstract A silver halide photographic material is disclosed, which comprises a support and at least one light-sensitive silver halide emulsion layer formed thereon, said emulsion layer containing at least one nucleating agent represented by formula (I) wherein A₁ and A₂ both represent a hydrogen atom, or one of A₁ and A₂ represents a hydrogen atom and the other represents a sulfinic acid residue or an acyl group; R₁ represents an aliphatic group, an aromatic group, or a heterocyclic group; R₂ represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group; G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group; and Y represents a phenylene group or a naphthylene group; the sum of the total carbon atoms of said R₁, R₂, and Y being at least 13. The nucleating agent provides very high contrast images when used in a negative working silver halide emulsion.
Inventors
- 👤 Morio Yagihara
- 👤 Hisashi Okada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 13:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A silver halide photographic material comprising a support and at least one light-sensitive silver halide emulsion layer formed thereon, said emulsion layer containing at least one compound represented by formula (I) wherein A₁ and A₂ both represent a hydrogen atom, or one of A₁ and A₂ represents a hydrogen atom and the other represents a sulfinic acid residue or an acyl group; R₁ represents an aliphatic group, an aromatic group, or a heterocyclic group; R₂ represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group; G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group; and Y represents a phenylene group or a naphthylene group; the sum of the total carbon atoms of said R₁, R₂, and Y being at least 13.
Claim 2
Dependent Claim
140 words
A silver halide photographic material comprising a support and at least one light-sensitive silver halide emulsion layer formed thereon, said emulsion layer containing at least one compound represented by formula (I) wherein A₁ and A₂ both represent a hydrogen atom, or one of A₁ and A₂ represents a hydrogen atom and the other represents a sulfinic acid residue or an acyl group; R₁ represents an aliphatic group, an aromatic group, or a heterocyclic group; R₂ represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group; G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group; and Y represents a phenylene group or a naphthylene group; the sum of the total carbon atoms of said R₁, R₂, and Y being at least 13.
Claim 3
Dependent Claim
49 words
A silver photographic material as claimed in claim 1, wherein working silver light-sensitive silver halide emulsion is a negative working silver halide emulsion and contains from 1 × 10⁻⁵ to 5 × 10⁻² mol per mol of silver halide of said at least one compound represented by formula (I).
Claim 4
Dependent Claim
43 words
A silver halide photographic material as claimed in claim 2, wherein said at least one compound represented by formula (I) is contained in an amount of from 2 × 10⁻⁵ to 1 × 10⁻² mol per mol of silver halide in the emulsion.
Claim 5
Dependent Claim
47 words
A silver halide photographic material as claimed in claim 1, wherein said light-sensitive silver halide emulsion is an internal latent image type silver halide emulsion and contains from 0.005 to 500 mg per mol of silver halide of said at least one compound represented by formula (I).
Claim 6
Dependent Claim
39 words
A silver halide photographic material as claimed in claim 4, wherein said at least one compound represented by formula (I) is contained in an amount of from 0.01 to 100 mg per mol of silver halide in the emulsion.
Claim 7
Dependent Claim
106 words
A silver halide photographic material as claimed in claim 1, wherein A₁ and A₂ both represent a hydrogen atom, or one of A₁ and A₂ represents a hydrogen atom and the other represents an alkylsulfonyl group having not more than 20 carbon atoms, an arylsulfonyl group having not more than 20 carbon atoms or an acyl group having not more than 20 carbon atoms; and R₁ represents a straight chain, branched or cyclic alkyl group, an alkenyl group, an alkinyl group, a mono- or bicyclic aryl group, or a 3-membered to 10-membered saturated or unsaturated heterocyclic group containing at least one of N, O and S.
Claim 8
Dependent Claim
25 words
A silver halide photographic material as claimed in claim 6, wherein A₁ and A₂ both represent a hydrogen atom, and R₁ represents an aryl group.
Claim 9
Dependent Claim
58 words
A silver halide photographic material as claimed in claim 2, wherein said light-sensitive silver halide emulsion is prepared in the presence of from 10⁻⁸ to 10⁻⁵ mol per mol of silver of at least one compound selected from the group consisting of iridium salt, a complex salt of iridium, a rhodium salt and a complex salt of rhodium.
Claim 10
Dependent Claim
58 words
A silver halide photographic material as claimed in claim 4, wherein said light-sensitive silver halide emulsion is prepared in the presence of from 10⁻⁸ to 10⁻⁵ mol per mol of silver of at least one compound selected from the group consisting of iridium salt, a complex salt of iridium, a rhodium salt and a complex salt of rhodium.
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