EP0164120A2
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A method for high contrast development of a silver halide photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1985-06-05
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Granted: —
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Expires: 2005-06-05
Abstract
Abstract A silver halide photographic material containing a hydrazine derivative of the general formula (I): wherein R 1 is a substituted or unsubstituted aryl group, is developed with high contrast by the use of an aqueous alkaline developer having a pH value of 10.5to 12.3 and comprising the following components (1) through (5): (1) a dihydroxybenzene type developing agent; (2) a p-aminophenol type developing agent; (3) at least 0.3 mol/l of a sulfite preservative; (4) 0.05 to 0.30 mol/l of an alkanolamine of the general formula (II): where R 2 is a hydroxyalkyl group having 2 to 10 carbon atoms; and ( 5 ) 10- 4 to 10 -2 mol/l of a mercapto compound of the general formula (III); where M 1 and M 2 are the same or different and each is a hydrogen atom, an alkali metal atom or an ammonium group; whereby a negative image of high contrast may be formed on said photographic material.
Inventors
- 👤 Eiichi Okutsu
- 👤 Mitsunori Hirano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
A method for high contrast development of a silver halide photographic material containing a hydrazine derivative of the general formula (I): wherein R 1 is a substituted or unsubstituted aryl group, to form a negative image of high contrast on said photographic material; characterized in that said photographic material is treated with an aqueous alkaline developer having a pH value of 10.5 to 12.3 and comprising the following components (1) through (5): (1) a dihydroxybenzene type developing agent; (2) a p-aminophenol type developing agent; (3) at least 0.3 mol/t of a sulfite preservative; (4) 0.05 to 0.30 mol/ℓ of an alkanolamine of the general formula (II): where R 2 is a hydroxyalkyl group having 2 to 10 carbon atoms; and (5) 10 -4 to 10 -2 mol/ℓ of a mercapto compound of the general formula (III): where M 1 and M 2 are the same or different and each is a hydrogen atom, an alkali metal atom or an ammonium group.
Claim 2
Independent Claim
161 words
A method for high contrast development of a silver halide photographic material containing a hydrazine derivative of the general formula (I): wherein R 1 is a substituted or unsubstituted aryl group, to form a negative image of high contrast on said photographic material; characterized in that said photographic material is treated with an aqueous alkaline developer having a pH value of 10.5 to 12.3 and comprising the following components (1) through (5): (1) a dihydroxybenzene type developing agent; (2) a p-aminophenol type developing agent; (3) at least 0.3 mol/t of a sulfite preservative; (4) 0.05 to 0.30 mol/ℓ of an alkanolamine of the general formula (II): where R 2 is a hydroxyalkyl group having 2 to 10 carbon atoms; and (5) 10 -4 to 10 -2 mol/ℓ of a mercapto compound of the general formula (III): where M 1 and M 2 are the same or different and each is a hydrogen atom, an alkali metal atom or an ammonium group.
Claim 3
Dependent Claim
42 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 1, wherein said dihydroxybenzene type developing agent (1) is one member selected from the group consisting of hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, methylhydroquinone, 2,3-dichlorohydroquinone, 2,3-dibromohydroquinone and 2,5-dimethylhydroquinone.
Claim 4
Dependent Claim
26 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 2, wherein said dihydroxybenzene type developing agent (1) is hydroquinone.
Claim 5
Dependent Claim
40 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 1, wherein said p-aminophenol type developing agent (2) is one member selected from the group consisting of N-methyl-p-aminophenol, p-aminophenol, N-(B-hydroxyethyl)-p-aminophenol, N-(4-hydroxyphenyl)glycine, 2-methyl-p-aminophenol and p-benzylaminophenol.
Claim 6
Dependent Claim
26 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 4, wherein said p-aminophenol type developing agent (2) is N-methyl-p-aminophenol.
Claim 7
Dependent Claim
51 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 1, wherein the amount of said dihydroxybenzene type developing agent (1) is within the range of 0.05 to 0.5 mol/i, and the amount of said p-aminophenol type developing agent (2) is 0.06 mol/ℓ or less.
Claim 8
Dependent Claim
45 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 1, wherein said sulfite preservative (3) is one member selected from the group consisting of sodium sulfite, potassium sulfite, lithium sulfite, sodium bisulfite, potassium metabisulfite and formaldehyde sodium bisulfite.
Claim 9
Dependent Claim
34 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 1, wherein said alkanolamine (4) is one member selected from the group consisting of 3-diethylamino-1,2-propanediol, 3-diethylaminopropanol and 2-diethylaminoethanol.
Claim 10
Dependent Claim
30 words
The method for high contrast development of a silver halide photographic material as claimed in Claim 1, wherein said mercapto compound (5) is selected from sodium 2-mercaptobenzimidazole-5-sulfonate and 2-mercaptobenzimidazole-5-sulfonic acid.
References Cited (Backward Citations)
No citation records indexed.
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