GB974303A - Improvements in or relating to photographic silver halide emulsions - Google Patents
Improvements in or relating to photographic silver halide emulsionsInfo
- Publication number
- GB974303A GB974303A GB2365/61A GB236561A GB974303A GB 974303 A GB974303 A GB 974303A GB 2365/61 A GB2365/61 A GB 2365/61A GB 236561 A GB236561 A GB 236561A GB 974303 A GB974303 A GB 974303A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver halide
- carbon atoms
- water
- group containing
- reduction
- 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
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)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
974, 303. Stabilizing photographic silver halide emulsions. KODAK Ltd. Jan. 20, 1961 [Jan. 25, 1960], No. 2365/61. Heading G2C. A light sensitive silver halide emulsion which is chemically sensitized with a labile sulphur compound, a gold sensitizer, and a reduction sensitizer is stabilized by incorporating in the emulsion before, during or after the chemical sensitization, preferablye before the reduction sensitization, an aryl aldehyde having a substituent in the 3- and/or 4- position with respect to the position of the aldehyde group, or mucochloric or mucobromic acid or a water-soluble salt thereof. Suitable substituents in the aryl aldehyde compound are hydroxyl, halogen, alkyl or alkoxyl. Examples of suitable compounds are p-hydroxybenzaldehyde, m-hydroxybenzaldehyde and vanillin. Examples of water-soluble salts of mucochloric and mucobromic acid are the sodium, potassium,pyridinium,triethanolammonium and morpholinium salts thereof. Reduction sensitizer, which are defined as compounds having a sufficiently strong reduction action to reduce silver halide to metallic silver or to nucleate silver halide, preferably comprise stannous chloride, spermine, sodium formaldehyde sulphoxylate or a compound according to any of the following general formulae:- where R, R1 and R2 each represents a hydrogen atom, an alkyl group or an aryl group and M represents a water-solubilizing cation such as hydrogen, sodium, potassium, ammonium and triethanolammonium. where R3 represents an alkylene group containing from 2 to 4 carbon atoms and n represents a positive integer from 1 to 5. Also suitable are their water-soluble salts of non-desensitizing acids. III (R4)d SiH4-d or their hydrolysis products:- IIIa (R4)d SiOH4-d where R4 represents a hydrogen atom, a halogen atom, an alkyl group containing from 1 to 30 carbon atoms, an aryl group containing from 6 to 10 carbon atoms, an aryloxy group containing from 6 to 10 carbon atoms, a siloxy group or combinations thereof and d represents a positive integer from 1 to 3. The sulphur and gold sensitizers are defined and exemplified in the Specification. Specifications 649,545, 753,489, 789,823 and U.S.A. Specification 2,694,637 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4188A US3128184A (en) | 1960-01-25 | 1960-01-25 | Antifoggants for gold sensitized emulsions in the presence of reduction sensitizers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB974303A true GB974303A (en) | 1964-11-04 |
Family
ID=21709594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2365/61A Expired GB974303A (en) | 1960-01-25 | 1961-01-20 | Improvements in or relating to photographic silver halide emulsions |
Country Status (2)
Country | Link |
---|---|
US (1) | US3128184A (en) |
GB (1) | GB974303A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3179520A (en) * | 1962-02-23 | 1965-04-20 | Fuji Photo Film Co Ltd | Sensitized photographic silver halide emulsions |
NL144403B (en) * | 1964-02-10 | 1974-12-16 | Kodak Nederland Bv | METHOD OF INCREASING THE SENSITIVITY OF PHOTOSENSITIVE SILVER HALOGENIDE EMULSIONS AND PHOTOGRAPHIC MATERIAL CONTAINED WITH THESE EMULSIONS. |
CH473887A (en) * | 1966-04-12 | 1969-06-15 | Ciba Geigy | Method of hardening gelatin |
US3881933A (en) * | 1971-05-18 | 1975-05-06 | Fuji Photo Film Co Ltd | Light-sensitive material undergoing little change of latent image formed therein |
EP0610609B1 (en) * | 1993-02-12 | 1999-05-06 | Agfa-Gevaert N.V. | Silver halide light-sensitive photographic material with enhanced image quality for rapid processing applications in mammography |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2080019A (en) * | 1936-09-10 | 1937-05-11 | Eastman Kodak Co | Hardening photographic emulsion |
US2226183A (en) * | 1939-12-27 | 1940-12-24 | Eastman Kodak Co | Mold inhibitor for photographic elements |
FR959922A (en) * | 1946-06-29 | 1950-04-07 | ||
BE523958A (en) * | 1952-11-08 | |||
BE557658A (en) * | 1956-05-21 | |||
US2870013A (en) * | 1956-11-29 | 1959-01-20 | Eastman Kodak Co | Hardening of gelatin with 2,3 dihydroxy dioxane |
BE595533A (en) * | 1959-10-01 |
-
1960
- 1960-01-25 US US4188A patent/US3128184A/en not_active Expired - Lifetime
-
1961
- 1961-01-20 GB GB2365/61A patent/GB974303A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3128184A (en) | 1964-04-07 |
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