EP0264192A2
Expired / Lapsed
EP
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Direct positive silver halide light-sensitive photographic material
Assignee: Konica Minolta Inc
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Filing: 1987-09-16
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Granted: —
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Expires: 2007-09-16
Abstract
Abstract The material comprises a support and a silver halide emulsion layer thereon containing direct positive silver halide grains adapted to form an internal latent image upon imagewise exposure and being unpre-fogged, and a compound represented by general formula [I], <CHEM> wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent. The emulsion has a maximum density which is sufficiently large and a minimum density which is sufficiently small. The foot portion of the density/exposure curve can exhibit high contrast while the highlight portion shows little or no tendency towards magenta color.
Inventors
- 👤 Yasuo Tosaka
- 👤 Fujitugu Suzuki
- 👤 Kazuya Kuramoto
- 👤 Bunzo Ueda
- 👤 Hideki Inahata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 04:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48538; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30529; G03C7/32; G03C7/36; G03C7/38; G03C7/381; G03C7/382; G03C7/3825
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A direct positive silver halide light-sensitive photographic material comprising a support and a silver halide emulsion layer thereon containing direct positive silver halide grains adapted to form an internal latent image upon imagewise exposure and being unpre-fogged, and a compound represented by general formula [I], wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent.
Claim 2
Dependent Claim
98 words
A direct positive silver halide light-sensitive photographic material comprising a support and a silver halide emulsion layer thereon containing direct positive silver halide grains adapted to form an internal latent image upon imagewise exposure and being unpre-fogged, and a compound represented by general formula [I], wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent.
Claim 3
Dependent Claim
59 words
The material of Claim 1 wherein said substituent for R is selected from the group consisting of halogen, alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, heterocyclic, acyl, sulfonyl, sulfinyl, phosphonyl, carbamoyl, sulfamoyl, cyano, spiro residue, bridged hydrocarbon residue, alkoxy, aryloxy, heterocyclic oxy, siloxy, acyloxy, carbamoyloxy, amino, acylamino, sulfonamide, imide, ureido, sulfamoylamino, alkoxycarbonylamino, aryloxycarbonylamino, alkoxycarbonyl, aryloxycarbonyl, alkylthio, arylthio, and heterocyclic thio.
Claim 4
Dependent Claim
49 words
The material of Claim 1 wherein X is selected from the group consisting of hydrogen, halogen, and and organic group having a carbon atom, an oxygen atom, a sulfur atom, a nitrogen atom or phosphorus atom through which said organic group is connected with the remainder of the compound.
Claim 5
Dependent Claim
106 words
The material of Claim 1 wherein X is selected from the group consisting of halogen; alkoxy; aryloxy; heterocyclic oxy; acyloxy; sulfonyloxy; alkoxycarbonyloxy; aryloxycarbonyloxy; alkyloxalyloxy; alkoxyoxalyloxy; alkylthio; arylthio; heterocyclicthio; alkyloxythiocarbonylthio; a group represented by the formula wherein R₄ʹ and R₅ʹ independently represent hydrogen, alkyl, aryl, heterocyclic, sulfamoyl, carbamoyl, acyl, sulfonyl, aryloxycarbonyl, or alkoxycarbonyl, provided that R₄ʹ and R₅ʹ are not simultaneously hydrogen atoms and R₄ʹ and R₅ʹ may combine with each other to form a nitrogen-containing heterocyclic group; carboxy; hydroxymethyl; triphenylmethyl; and a group represented by the formula, wherein R₂ʹ and R₃ʹ are independently selected from the group consisting of hydrogen, aryl, alkyl, and a heterocyclic group.
Claim 6
Dependent Claim
34 words
The material of Claim 1 wherein said nitrogen-containing heterocyclic ring is selected from the group consisting of pyrazole, imidazole, triazole, and tetrazole, each of which may have the same substituent as defined for R.
Claim 7
Dependent Claim
18 words
The material of Claim 1 wherein said compound represented by general formula [I] is a magenta dye-forming coupler.
Claim 8
Dependent Claim
34 words
The material of Claim 6 wherein said magenta dye forming coupler is selected from a compound represented by formula [VIII]: wherein R₁, X and Z₁ have the same meaning as R, X and Z.
Claim 9
Dependent Claim
32 words
The material of Claim 6 wherein said magenta dye forming coupler is selected from a compound represented by formulas [II] to [VII]: wherein R₁ to R₈ have the same meaning as R.
Claim 10
Dependent Claim
40 words
The material of Claim 6 wherein said magenta dye forming coupler is selected from a compound represented by formula [XI]: wherein R₁₂ is an alkylene group and R₁₃ is selected from the group consisting of alkyl, cyclo alkyl, and aryl.
Claim 11
Dependent Claim
15 words
The material of Claim 1 wherein said silver halide grains are core/shell silver halide grains.
Claim 12
Dependent Claim
17 words
The material of Claim 10 wherein said shell contains at least 30 mol % of silver chloride.
Claim 13
Dependent Claim
22 words
The material of Claim 1 wherein the silver chloride content of the silver halide grains is not less than 5 mol %.
Claim 14
Dependent Claim
22 words
The material of Claim 1 wherein the silver chloride content of the silver halide grains is not less than 30 mol %.
Claim 15
Dependent Claim
33 words
The material of Claim 1 wherein said silver halide grains consisting essentially of a mixture of at least two sizes of silver halide grains each of which has a different average grain size.
Claim 16
Dependent Claim
30 words
The material of Claim 14 wherein the size of the smaller of said two sizes is no more than 80% of the size of the larger of said two sizes.
Claim 17
Independent Claim
134 words
A method for the formation of a direct positive image which comprises imagewise exposing a direct positive silver halide light-sensitive photographic material, and subjecting said exposed direct positive silver halide light-sensitive photographic material to surface development after or with a fogging treatment, said material comprising a support and a silver halide emulsion layer thereon containing direct positive silver halide grains adapted to form an internal latent image upon imagewise exposure and being unpre-fogged, and a compound represented by general formula [1], wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent.
Claim 18
Independent Claim
134 words
A method for the formation of a direct positive image which comprises imagewise exposing a direct positive silver halide light-sensitive photographic material, and subjecting said exposed direct positive silver halide light-sensitive photographic material to surface development after or with a fogging treatment, said material comprising a support and a silver halide emulsion layer thereon containing direct positive silver halide grains adapted to form an internal latent image upon imagewise exposure and being unpre-fogged, and a compound represented by general formula [1], wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent.
References Cited (Backward Citations)
No citation records indexed.
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