GB492257A - Improvements in or relating to photographic light sensitive elements - Google Patents
Improvements in or relating to photographic light sensitive elementsInfo
- Publication number
- GB492257A GB492257A GB21733/38A GB2173338A GB492257A GB 492257 A GB492257 A GB 492257A GB 21733/38 A GB21733/38 A GB 21733/38A GB 2173338 A GB2173338 A GB 2173338A GB 492257 A GB492257 A GB 492257A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compound
- emulsion
- emulsions
- referred
- amino
- 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
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
-
- 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
-
- 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/26—Silver halide emulsions for subtractive colour processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Colloid Chemistry (AREA)
Abstract
492,257. Photographic emulsions. KODAK, Ltd. Feb. 15, 1937, No. 21733/38. Convention date, June 9, 1936. Divided out of 492,162. [Class 9S (ii)] Alteration in acidity or hydrogen ion concentration of photographic gelatine emulsion layers is prevented by buffering the emulsion in the range pH5 to pH10 by adding to the wet emulsion before coating 0À15 to 1À0 per cent by weight on the wet emulsion of a substantially colourless organic amino compound or compounds, the compound being an arylamine or aralkylamine containing one aromatic nucleus, or an aliphatic amino-carboxylic acid, or an aliphatic amino-sulphonic acid, or an amidine, the compound being inert with respect to silver halides and having a pKa value between 5À5 and 9À5 or a pKb value between 4À5 and 8À5, and having sufficient water-solubility to avoid crystallization in air-dry gelatine. A suitable amount of the compound is 0'15 per cent by weight on the wet emulsion. Compounds referred to are alpha-amino-n-butyric acid, taurine, ethylene diamine, dimethylbenzylamine and guanidine. The use of hydroxylamine hydrochloride is also referred to. Positive, negative, X-ray, and print-out emulsions may be treated, and the silver halides used in the emulsions may be silver chloride, bromide or iodide. Specification 492,162 is referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64103A US2139767A (en) | 1936-02-15 | 1936-02-15 | Buffered photographic film |
US84317A US2184023A (en) | 1936-02-15 | 1936-06-09 | Buffered photographic emulsion |
Publications (1)
Publication Number | Publication Date |
---|---|
GB492257A true GB492257A (en) | 1938-09-15 |
Family
ID=21953584
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4494/37A Expired GB482633A (en) | 1936-02-15 | 1937-02-15 | Improvements in or relating to photographic light sensitive elements |
GB21733/38A Expired GB492257A (en) | 1936-02-15 | 1937-02-15 | Improvements in or relating to photographic light sensitive elements |
GB4496/37A Expired GB492162A (en) | 1936-02-15 | 1937-02-15 | Improvements in or relating to photographic light sensitive elements |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4494/37A Expired GB482633A (en) | 1936-02-15 | 1937-02-15 | Improvements in or relating to photographic light sensitive elements |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4496/37A Expired GB492162A (en) | 1936-02-15 | 1937-02-15 | Improvements in or relating to photographic light sensitive elements |
Country Status (3)
Country | Link |
---|---|
US (2) | US2139767A (en) |
FR (1) | FR825975A (en) |
GB (3) | GB482633A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698245A (en) * | 1946-04-13 | 1954-12-28 | Polaroid Corp | Photographic product and process for making a positive transfer image |
US2448534A (en) * | 1946-07-06 | 1948-09-07 | Eastman Kodak Co | Sensitized photographic cellulose ester silver halide emulsion |
US2635048A (en) * | 1948-07-06 | 1953-04-14 | Polaroid Corp | Photographic transfer product and process |
US2857273A (en) * | 1953-07-31 | 1958-10-21 | Gen Aniline & Film Corp | Photographic film having enhanced herschel effect susceptibility and the process using the same |
US3220841A (en) * | 1962-01-12 | 1965-11-30 | Eastman Kodak Co | Photographic film |
US3123492A (en) * | 1962-02-28 | 1964-03-03 | Maffet | |
JPS6341853A (en) * | 1986-08-07 | 1988-02-23 | Fuji Photo Film Co Ltd | Silver halide color photographic sensitive material |
-
1936
- 1936-02-15 US US64103A patent/US2139767A/en not_active Expired - Lifetime
- 1936-06-09 US US84317A patent/US2184023A/en not_active Expired - Lifetime
-
1937
- 1937-02-15 GB GB4494/37A patent/GB482633A/en not_active Expired
- 1937-02-15 FR FR825975D patent/FR825975A/en not_active Expired
- 1937-02-15 GB GB21733/38A patent/GB492257A/en not_active Expired
- 1937-02-15 GB GB4496/37A patent/GB492162A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB482633A (en) | 1938-04-01 |
US2139767A (en) | 1938-12-13 |
US2184023A (en) | 1939-12-19 |
GB492162A (en) | 1938-09-15 |
FR825975A (en) | 1938-03-18 |
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