GB1257257A - - Google Patents
Info
- Publication number
- GB1257257A GB1257257A GB1257257DA GB1257257A GB 1257257 A GB1257257 A GB 1257257A GB 1257257D A GB1257257D A GB 1257257DA GB 1257257 A GB1257257 A GB 1257257A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grains
- layer
- silver halide
- iodide
- latent image
- 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
- G03C1/46—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein having more than one photosensitive layer
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
1,257,257. Photographic silver halide material EASTMAN KODAK CO. April 17, 1969 April 18, 1968], No. 19616/69. Heading G2C. A photographic element comprises a support, and (a) unfogged, surface latent image, iodidecontaining silver halide grains and (b) fogged, internal latent image silver halide grains, said grains being in the same layer on the support or in adjacent layers, which are contiguous or separated by an intermediate layer, said element also comprising above or below said layer or adjacent layers, another layer, (1), comprising unfogged silver halide grains in which said halide comprises less than 10 mole per cent iodide, if any, and which have a photographic surface sensitivity which is less than<SP> 1</SP>/ 10 th that of said surface latent image, iodide-containing silver halide grains(a). Grains (a) and some of grains (b) may be in one layer and the remainder of the (b) grains are in an adjacent layer as defined above. Layer (1) may be next to the support, the layer of grains (b) being directly over layer (1) and the layer of grains (a) being over the layer of grains (b). The unfogged, surface latent image, iodide-containing silver halide grains (a) preferably contain from 0À5 to 10 mole per cent iodide. The unfogged iodide-containing grains (a) are preferably chemically and spectrally sensitized. The unfogged, iodide-containing silver halide grains (a) are preferably silver bromoiodide, and the molar ratio of said grains (a) to said grains (b) is preferably at least 1:1. The halide is said silver halide grains in layer (1) contains 30 to 65 mole per cent chloride, the remainder being silver bromide. The molar ratio of said grains (a) to the silver halide grains in layer (1) is preferably from 20:1 to 1:1. The layer (1) of the present invention reduces fog and speed loss upon development of the combination of various surface latent image grains with various internally fogged latent image grains, especially when continuous processing tanks or developer baths are used where developers are not replenished or changed for long periods of time.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72222368A | 1968-04-18 | 1968-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1257257A true GB1257257A (en) | 1971-12-15 |
Family
ID=24900959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1257257D Expired GB1257257A (en) | 1968-04-18 | 1969-04-17 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3607278A (en) |
BE (1) | BE731674A (en) |
DE (1) | DE1912332A1 (en) |
FR (1) | FR2006427A1 (en) |
GB (1) | GB1257257A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2121554A (en) * | 1982-06-09 | 1983-12-21 | Fuji Photo Film Co Ltd | Silver halide photographic light-sensitive material |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE791423A (en) * | 1971-11-20 | 1973-05-16 | Agfa Gevaert Nv | PHOTOGRAPHIC MATERIAL FOR CREATING EQUIDENSITES |
CA1057109A (en) * | 1975-04-10 | 1979-06-26 | Nicholas H. Groet | Enhancement of interimage effects |
JPS5837643A (en) | 1981-08-31 | 1983-03-04 | Fuji Photo Film Co Ltd | Developing method for photosensitive silver halide material |
JPS59121039A (en) * | 1982-12-27 | 1984-07-12 | Fuji Photo Film Co Ltd | Photographic sensitive silver halide material |
JPS61285445A (en) * | 1985-06-12 | 1986-12-16 | Fuji Photo Film Co Ltd | Silver halide photographic sensitive material |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2456956A (en) * | 1942-02-09 | 1948-12-21 | Eastman Kodak Co | Photographic processes and lightsensitive elements therefor |
BE468652A (en) * | 1942-09-02 | |||
BE609927A (en) * | 1959-01-12 | |||
US2996382A (en) * | 1959-01-12 | 1961-08-15 | Eastman Kodak Co | Photographic elements having improved sensitivity |
US3206313A (en) * | 1961-05-15 | 1965-09-14 | Eastman Kodak Co | Chemically sensitized emulsions having low surface sensitivity and high internal sensitivity |
US3490751A (en) * | 1967-09-27 | 1970-01-20 | Stoelling Brothers Co | Stirring paddle assembly for process vat |
-
1968
- 1968-04-18 US US722223A patent/US3607278A/en not_active Expired - Lifetime
-
1969
- 1969-03-11 DE DE19691912332 patent/DE1912332A1/en active Pending
- 1969-04-16 FR FR6911701A patent/FR2006427A1/fr not_active Withdrawn
- 1969-04-17 BE BE731674D patent/BE731674A/xx unknown
- 1969-04-17 GB GB1257257D patent/GB1257257A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2121554A (en) * | 1982-06-09 | 1983-12-21 | Fuji Photo Film Co Ltd | Silver halide photographic light-sensitive material |
Also Published As
Publication number | Publication date |
---|---|
FR2006427A1 (en) | 1969-12-26 |
US3607278A (en) | 1971-09-21 |
BE731674A (en) | 1969-10-01 |
DE1912332A1 (en) | 1969-10-23 |
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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 |