US4892803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color image-forming process compressing developer containing no benzyl alcohol
Assignee: Fujifilm Holdings Corp
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Filing: 1987-01-23
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Granted: 1990-01-09
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Expires: 2007-01-23
Abstract
Abstract A color image-forming process which comprises developing, after imagewise exposure, a color photographic paper having at least one light-sensitive layer containing a core/shell surface latent image type monodispersed silver halide emulsion containing substantially no silver iodide, having a silver chloride content of up to 80 mol %, and having a silver bromide content in the shell portion lower than in the core portion with a color developer containing substantially no benzyl alcohol. When the color photographic paper described above is processed, color images having less fog can be obtained with high color density in a short time without using benzyl alcohol as a development accelerator, with the benzyl alcohol causing a pollution problem.
Inventors
- 👤 Kokichi Waki
- 👤 Kazunori Hasebe
- 👤 Masahiro Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C7/00; G03C7/30; G03C7/3022; G03C2001/03511; G03C2001/03517; G03C2001/03535; G03C2001/0357
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
A color image-forming process which comprises developing, after imagewise exposure, a color photographic light-sensitive material comprising a reflective support having provided thereon at least one silver halide emulsion layer containing a core/shell surface latent image type monodispersed silver halide emulsion (having a variation coefficient of up to 0.15) containing no silver iodide, having a silver chloride content of up to 80 mol%, and having a silver bromide content in the shell portion lower than that in the core portion with a color developer containing substantially no benzyl alcohol within 2 minutes and 30 seconds.
Claim 2
Dependent Claim
94 words
A color image-forming process which comprises developing, after imagewise exposure, a color photographic light-sensitive material comprising a reflective support having provided thereon at least one silver halide emulsion layer containing a core/shell surface latent image type monodispersed silver halide emulsion (having a variation coefficient of up to 0.15) containing no silver iodide, having a silver chloride content of up to 80 mol%, and having a silver bromide content in the shell portion lower than that in the core portion with a color developer containing substantially no benzyl alcohol within 2 minutes and 30 seconds.
Claim 3
Dependent Claim
70 words
The color image-forming process as claimed in claim 1, wherein the average grain size of the core/shell surface latent image type monodispersed silver halide emulsion is from 0.1 μm to 2 μm expressed as the diameter of an equivalent circle by projection, and the grain size distribution of the emulsion is up to 0.10 in s/d (wherein, s is the statistical standard deviation and d is the average grain size).
Claim 4
Dependent Claim
36 words
The color image-forming process as claimed in claim 1 or 2, wherein the core/shell surface latent image type monodispersed silver halide emulsion is a silver chlorobromide emulsion containing from 2 to 80 mol% of silver chloride.
Claim 5
Dependent Claim
21 words
The color image-forming process as claimed in claim 3, wherein the content of silver chloride is from 2 to 50 mol%.
Claim 6
Dependent Claim
30 words
The color image-forming process as claimed in claim 1, wherein the color developer is an alkaline aqueous solution containing an aromatic primary amine color developing agent as the main component.
Claim 7
Dependent Claim
138 words
The color image-forming process as claimed in claim 1, which comprises, after imagewise exposure, subjecting a color photographic light-sensitive material comprising a reflective support having provided thereon at least one blue-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, and at least one red-sensitive silver halide emulsion layer to color development, bleach and fix or blix, and wash and/or stabilization, wherein at least one of said silver halide emulsion layers contains a core/shell surface latent image type silver halide emulsion containing no silver iodide, having a silver bromide content of up to 80 mol%, and having a silver bromide content in the shell portion lower than that in the core portion and wherein said color development is carried out using a color developer containing substantially no benzyl alcohol within 2 minutes and 30 seconds.
Claim 8
Dependent Claim
72 words
The color image-forming process as claimed in claim 6, wherein the average grain size of the core/shell surface latent image type monodispersed silver halide emulsion is from 0.1 μm to 2 μm expressed as the diameter of an equivalent circle by projection and the grain size distribution of the silver halide emulsion is up to 0.10 in s/d (wherein, s is the statistical standard deviation and d is the average grain size).
Claim 9
Dependent Claim
36 words
The color image-forming process as claimed in claim 6 or 7, wherein the core/shell surface latent image type monodispersed silver halide emulsion is a silver chlorobromide emulsion containing from 2 to 80 mol% of silver chloride.
Claim 10
Dependent Claim
21 words
The color image-forming process as claimed in claim 8, wherein the content of silver chloride is from 2 to 50 mol%.
Claim 11
Dependent Claim
30 words
The color image-forming process as claimed in claim 6, wherein the color developer is an alkaline aqueous solution containing an aromatic primary amine color developing agent as the main component.
Claim 12
Dependent Claim
42 words
The color image-forming process as claimed in claim 1, wherein the silver bromide content in the core portion of the core/shell surface latent image type monodispersed silver halide emulsion is at least 10 mol% higher than that in the shell portion thereof.
Claim 13
Dependent Claim
42 words
The color image-forming process as claimed in claim 1, wherein the silver bromide content in the core portion of the core/shell surface latent image type monodispersed silver halide emulsion is at least 15 mol% higher than that in the shell portion thereof.
Claim 14
Dependent Claim
41 words
The color image-forming process as claimed in claim 1, wherein the silver bromide content in the core portion of the core/shell surface latent image type monodispersed silver halide emulsion is at least 20% higher than that in the shell portion thereof.
Claim 15
Dependent Claim
23 words
The color image-forming process as claimed in claim 1, wherein the silver halide forms latent images mainly on the surface of the grains.
Claim 16
Dependent Claim
17 words
The color image-forming process as claimed in claim 1, wherein the color developer contains no benzyl alcohol.
Claim 17
Dependent Claim
22 words
The color image-forming process as claimed in claim 5 or 10, wherein the aromatic primary amine developing agent is a p-phenylenediamine compound.
Claim 18
Dependent Claim
17 words
The color image-forming process as claimed in claim 16, wherein the p-phenylenediamine compound is 3-methyl-4-amino-N-ethyl-N-β-methanesulfonamidoethylaniline or 3-methyl-4-amino-N-ethyl-N-hydroxyethylaniline.
Claim 19
Dependent Claim
15 words
The color image-forming process as claimed in claim 16, wherein the p-phenylenediamine-series compound is 3-methyl-4-amino-N-ethyl-N-β-methanesulfonamidoethylaniline.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |