GB1305773A - - Google Patents
Info
- Publication number
- GB1305773A GB1305773A GB1904370A GB1904370A GB1305773A GB 1305773 A GB1305773 A GB 1305773A GB 1904370 A GB1904370 A GB 1904370A GB 1904370 A GB1904370 A GB 1904370A GB 1305773 A GB1305773 A GB 1305773A
- Authority
- GB
- United Kingdom
- Prior art keywords
- selenium
- silver
- sulphur
- silver halide
- coupler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
- G03C1/346—Organic derivatives of bivalent sulfur, selenium or tellurium
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
1305773 Sensitized photographic silver halide emulsions EASTMAN KODAK CO 21 April 1970 [22 April 1969] 19043/70 Heading G2C A sulphur and selenium sensitized photographic silver halide emulsion of which the silver halide contains at least 10 mole per cent silver chloride and not more than 10 mole percent silver iodide, the remainder being silver bromide, contains a colour coupler. The sulphur and selenium sensitization may be effected simultaneously. The silver halide grains may be chemically sensitized after having reached their final size and shape. The colour coupler may be incorporated in the emulsion after chemical sensitization of the grains. Chemical sensitization may be effected with a mixture of sodium thiosulphate and dimethylselenourea. The selenium sensitizer may be generated in situ from a non-labile selenium compound (i.e. one which does not yield a silver selenide that is insoluble in water at 20‹C upon addition of aqueous silver nitrate solution). The sulphur sensitizer and the labile or non-labile selenium compound may be added to the emulsion as a solution in a water-immisable solvent. The combination of sulphur and selenium sensitization and the presence of the coupler provides a synergistic increase in speed without adversely affecting the colour development characteristics of the coupler.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81841869A | 1969-04-22 | 1969-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1305773A true GB1305773A (en) | 1973-02-07 |
Family
ID=25225490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1904370A Expired GB1305773A (en) | 1969-04-22 | 1970-04-21 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3591385A (en) |
| BE (1) | BE748958A (en) |
| CA (1) | CA929782A (en) |
| FR (1) | FR2043359A5 (en) |
| GB (1) | GB1305773A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69230387T2 (en) | 1991-04-22 | 2000-06-29 | Fuji Photo Film Co., Ltd. | Silver halide photographic materials and methods of processing them |
| DE69328884T2 (en) | 1992-03-19 | 2000-12-07 | Fuji Photo Film Co., Ltd. | Process for the preparation of a silver halide photographic emulsion |
| US5556738A (en) * | 1994-07-18 | 1996-09-17 | Konica Corporation | Silver halide photographic element and processing method thereof |
| US5616446A (en) * | 1994-09-29 | 1997-04-01 | Konica Corporation | Silver halide photographic light-sensitive material |
| WO2004068237A1 (en) * | 2003-01-31 | 2004-08-12 | Konica Corporation | Silver halide emulsion, silver halide photographic sensitive material, and method of image formation |
-
1969
- 1969-04-22 US US818418A patent/US3591385A/en not_active Expired - Lifetime
-
1970
- 1970-03-05 CA CA076555A patent/CA929782A/en not_active Expired
- 1970-04-14 BE BE748958D patent/BE748958A/en unknown
- 1970-04-15 FR FR7013533A patent/FR2043359A5/fr not_active Expired
- 1970-04-21 GB GB1904370A patent/GB1305773A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA929782A (en) | 1973-07-10 |
| US3591385A (en) | 1971-07-06 |
| FR2043359A5 (en) | 1971-02-12 |
| BE748958A (en) | 1970-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |