Patent US5084374A successfully refreshed from Google Patents.
US5084374A
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Silver halide color photographic material improved in color reproduction and gradation reproduction
Assignee: Fujifilm Holdings Corp
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Filing: 1990-10-17
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Granted: 1992-01-28
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Expires: 2010-10-17
Abstract
Abstract There is disclosed a silver halide color photographic material having (A) a red-sensitive, (B) a green-sensitive, and (C) a blue sensitive silver halide emulsion layers, wherein the silver halide emulsion of each layer is a high-silver-chloride emulsion, and the silver halide emulsions of the red-sensitive and blue-sensitive layers is spectrally sensitized in the blue light region within a range satisfying specific relationships. Further two or more silver halide emulsions are mixed so that the gammas of the (A) red-sensitive and the (B) green-sensitive layers in the photosensitive region of the blue-sensitive layer may be in a limited range. The disclosure as described provides a silver halide color photographic material which can form a color image giving a stereoscopic feeling that can reproduce bright primary colors less in turbidity over the range from the low-density part to the high-density part, and which can produce fully the high-density region of primary colors with subtle shades.
Inventors
- 👤 Kokichi Waki
- 👤 Masahiro Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:47
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C1/00; G03C1/005; G03C1/035; G03C2001/03517
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A silver halide color photographic material having a red-sensitive silver halide emulsion layer (A), a green-sensitive silver halide emulsion layer (B), and a blue-sensitive silver halide emulsion layer (C), which comprises in said layers (A), (B), and (C) silver chlorobromide emulsions having silver chloride contents of 95 mol % or over, the silver halide emulsions of the layers (A) and/or (B) being spectrally sensitized in the blue light region in the grain-forming step and/or the chemically sensitizing step, to meet the following relationships: 1.8≦BS(C)-BS(A)≦2.4 and 1.4≦BS(C)-BS(B)≦2.0, wherein BS(A), BS(B), and BS(C) represent the blue sensitivities of the layer (A), the layer (B), and the layer (C), respectively, in terms of log (1/exposure amount) at the time when the optical density of cyan, magenta, and yellow is 1.0, and two or more silver halide emulsions being mixed in each of the layers (A) and (B) so that the gammas of the layers (A) and (B) in the photosensitive region of the layer (C) may be 0.6 to 1.3 times that of the layer (C).
Claim 2
Dependent Claim
173 words
A silver halide color photographic material having a red-sensitive silver halide emulsion layer (A), a green-sensitive silver halide emulsion layer (B), and a blue-sensitive silver halide emulsion layer (C), which comprises in said layers (A), (B), and (C) silver chlorobromide emulsions having silver chloride contents of 95 mol % or over, the silver halide emulsions of the layers (A) and/or (B) being spectrally sensitized in the blue light region in the grain-forming step and/or the chemically sensitizing step, to meet the following relationships: 1.8≦BS(C)-BS(A)≦2.4 and 1.4≦BS(C)-BS(B)≦2.0, wherein BS(A), BS(B), and BS(C) represent the blue sensitivities of the layer (A), the layer (B), and the layer (C), respectively, in terms of log (1/exposure amount) at the time when the optical density of cyan, magenta, and yellow is 1.0, and two or more silver halide emulsions being mixed in each of the layers (A) and (B) so that the gammas of the layers (A) and (B) in the photosensitive region of the layer (C) may be 0.6 to 1.3 times that of the layer (C).
Claim 3
Dependent Claim
149 words
The silver halide color photographic material as claimed in claim 1, wherein said silver halide color photographic material comprises a pyrazoloazole coupler represented by the following formula (M-II): Formula (M-II) ##STR49## wherein R 10 represents a hydrogen atom or a substituent, Y 4 represents a hydrogen atom or a group capable of being released upon coupling reaction, Za, Zb, and Zc each represent methine, a substituted methine, ═N--, or --NH--, and one of the Za--Zb bond and the Zb--Zc bond is a double bond, and the other is a single bond, and when Zb--Zc bond is a carbon-carbon double bond, the double bond may be part of the aromatic ring, a dimer or more higher polymer may be formed through R 10 or Y 4 , and when Za, Zb, or Zc is a substituted methine, a dimer or more higher polymer may be formed through the substituted methine.
Claim 4
Dependent Claim
27 words
The silver halide color photographic material as claimed in claim 1, wherein the silver chloride content in the silver chlorobromide emulsions is 98 mol % or over.
Claim 5
Dependent Claim
27 words
The silver halide color photographic material as claimed in claim 1, wherein the silver iodide content in the silver chlorobromide emulsions is 1 mol % or less.
Claim 6
Dependent Claim
51 words
The silver halide color photographic material as claimed in claim 1, having a silver bromide localized layer in a layered form or non-layered form which is present in the silver halide grains of the silver halide emulsion and/or on the surface of the silver halide grains of the silver halide emulsions.
Claim 7
Dependent Claim
33 words
The silver halide color photographic material as claimed in claim 1, wherein the average grain size of the silver halide grains contained in the silver of halide emulsions is 0.1 to 2 μm.
Claim 8
Dependent Claim
35 words
The silver halide color photographic material as claimed in claim 1, wherein the grain size distribution of the silver halide grains contained in the silver halide emulsions has a deviation coefficient of 20% or less.
Claim 9
Dependent Claim
30 words
The silver halide color photographic material as claimed in claim 1, wherein the silver halide grains of the silver halide emulsions have an average aspect ratio of 5 or over.
Claim 10
Dependent Claim
38 words
The silver halide color photographic material as claimed in claim 1, wherein the amount of the spectrally sensitizing dye to be added is in the range of 1×10 -6 to 1×10 -3 mol per mol of silver halide.
Claim 11
Dependent Claim
37 words
The silver halide color -photographic material as claimed in claim 1, wherein gammas of the layers (A) and (B) in the photosensitive region of the layer (C) are 0.8 to 1.1 times that of the layer (C).
References Cited (Backward Citations)
US4830956A
Cited
US4839270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |