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US5118592A Expired / Lapsed US ⏱️ 0.0 years remaining

Color photographic image formation method

Assignee: Fujifilm Corp
•
Filing: 1991-12-24
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Granted: 1992-06-02
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Expires: 2011-12-24
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Abstract

Abstract A method for forming an image, which comprises developing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color developing agent, wherein said silver halide color photographic material comprises a silver chloride or silver chlorobromide emulsion having an average silver bromide content of not more than 10 mol % and containing substantially no iodide, with a mean grain size of an emulsion contained in the blue-sensitive layer thereof being controlled to 0.9 μm or smaller, silver halide to coupler ratio in said blue-sensitive layer ranges from 2 to 5 as a molar ratio, and said color developer contains from 3.5×10 -2 to 1.5×10 -1 mol/l of a chloride ion and from 3.0×10 -5 to 1.0×10 -3 mol/l of a bromide ion. The method achieves rapid processing to provide an image having high maximum density and low density without causing streaky pressure marks even when processing is carried out with an automatic developing machine or without a variation of photographic characteristics, particularly gradation in low density areas, occurring even when processing is carried out continuously.

Inventors

  • 👤 Kazunori Hasebe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 18:34
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022; G03C7/407; G03C7/413; Y; Y10; Y10S; Y10S430/00; Y10S430/164

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 130 words
A method for forming an image which comprises developing an image-wise exposed silver halide color photographic material with a color developer containing at least one aromatic primary amine color developing agent, wherein said silver halide color photographic material comprises a silver chloride or silver chlorobromide emulsion having an average silver bromide content of 10 mol% or less and containing substantially no iodide, with a mean grain size of an emulsion contained in the blue-sensitive layer thereof being controlled to 0.9 μm or smaller, wherein the silver halide to coupler ratio in said blue-sensitive layer ranges from 2 to 5 as a molar ratio, and wherein said color developer contains from 3.5×10 -2 to 1.5×10 -1 mol/l of chloride ion and from 5.0×10 -5 to 5.0×10 -4 mol/l of bromide ion.
Claim 2
Independent Claim 130 words
A method for forming an image which comprises developing an image-wise exposed silver halide color photographic material with a color developer containing at least one aromatic primary amine color developing agent, wherein said silver halide color photographic material comprises a silver chloride or silver chlorobromide emulsion having an average silver bromide content of 10 mol% or less and containing substantially no iodide, with a mean grain size of an emulsion contained in the blue-sensitive layer thereof being controlled to 0.9 μm or smaller, wherein the silver halide to coupler ratio in said blue-sensitive layer ranges from 2 to 5 as a molar ratio, and wherein said color developer contains from 3.5×10 -2 to 1.5×10 -1 mol/l of chloride ion and from 5.0×10 -5 to 5.0×10 -4 mol/l of bromide ion.
Claim 3
Dependent Claim 19 words
A method as claimed in claim 1, wherein the silver chlorobromide emulsion contains 1 mol% or less silver iodide.
Claim 4
Dependent Claim 19 words
A method as claimed in claim 1, wherein the silver chlorobromide emulsion contains 0.2 mol% or less silver iodide.
Claim 5
Dependent Claim 19 words
A method as claimed in claim 1, wherein the silver chlorobromide emulsion contains 5 mol% or less silver bromide.
Claim 6
Dependent Claim 26 words
A method as claimed in claim 1, wherein the mean grain size of the emulsion contained in the blue-sensitive layer is 0.3 μm to 0.9 μm.
Claim 7
Dependent Claim 33 words
A method as claimed in claim 1, wherein the emulsion in the blue-sensitive layer is a monodispersed emulsion having a coefficient of variation of grain size of not more than 20% or less.
Claim 8
Dependent Claim 19 words
A method as claimed in claim 1, wherein the photographic emulsion contains at least one of a stabilizer compound.
Claim 9
Dependent Claim 25 words
A method as claimed in claim 1, wherein the silver halide color photographic material contains a yellow coupler, a magenta coupler and a cyan coupler.
Claim 10
Dependent Claim 21 words
A method as claimed in claim 1, wherein the color developer contains 4×10 -2 to 1×10 -1 mol/l of chloride ion.
Claim 11
Dependent Claim 27 words
A method as claimed in claim 1, wherein the silver halide to coupler ratio in said blue-sensitive layer ranges from 2 to 4 as a molar ratio.
Claim 12
Dependent Claim 27 words
A method as claimed in claim 10, wherein the silver halide to coupler ratio in said blue-sensitive layer ranges from 2.2 to 3 as a molar ratio.

References Cited (Backward Citations)

EP0080896A2 Cited
EP0086074A1 Cited
US4880728A Cited
US4853321A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-06-02 1995-12-02 1996-06-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-06-02 1999-12-02 2000-06-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-06-02 2003-12-02 2004-06-02 $7700.00 Window Closed / Lapsed

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