GB1009475A - Photographic silver halide emulsions of increased sensitivity - Google Patents
Photographic silver halide emulsions of increased sensitivityInfo
- Publication number
- GB1009475A GB1009475A GB31254/62A GB3125462A GB1009475A GB 1009475 A GB1009475 A GB 1009475A GB 31254/62 A GB31254/62 A GB 31254/62A GB 3125462 A GB3125462 A GB 3125462A GB 1009475 A GB1009475 A GB 1009475A
- Authority
- GB
- United Kingdom
- Prior art keywords
- perchlorate
- silver halide
- hydrozinium
- bis
- hydroquinone
- 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
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
-
- 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
- G03C1/42—Developers or their precursors
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)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
1,009,475. Photographic materials. EASTMAN KODAK CO. Aug. 15, 1962 [Aug. 17, 1961], No. 31254/62. Heading G2C. A photographic silver halide emulsion is sensitised in the silver halide or adjacent layer with a quaternary ammonium or a hydrozinium salt and either (a) a 3-pyrasolidone developer or (b) a hydroquinone developer and a compound capable of giving rise to a bisulphite ion in an aqueous solution (e.g. sulphur dioxide and/or an alkali metal bisulphite). Alternatively, the emulsion may contain both components (a) and (b) specified ammonium salts are those of Specifications 558,710 874,077 and 911,501 and specified hydrozinium salts are those of Specification 981,254. Exemplified ammonium salts are 7, 18 diaza-8, 19- dioxotetracosane-1, 2, 4-bis (pyridinium perchlorate); tetradecamethylene bis-(pyridinium perchlorate); and 7, 18-dioxa-8, 17-dioxo-tetracosene-1, 2, 4-bis (pyridinium perchlorate) and exemplifies hydrozinium salts are 1-n-decyl-1, 1-dimethyl hydrazinium perchlorate; and 1, 2-ethylene-, 1, 4- tetramethylene-, or 1, 6-hexamethylenebis (1, 1- dimethyl hydrazinium perchlorate. Specified pyrazolidons are those of formula wherein R to R4 are hydrogen, alkyl or aryl. The hydroquinone may be hydroquise, toluhydroquinone, 2, 5-dihydroxybenzoic acid or a kathrate of hydroquinone and sulphur dioxide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US132012A US3212899A (en) | 1961-08-17 | 1961-08-17 | Photographic silver halide emulsions sensitized with quaternary ammonium salt and developer combinations |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1009475A true GB1009475A (en) | 1965-11-10 |
Family
ID=22452028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31254/62A Expired GB1009475A (en) | 1961-08-17 | 1962-08-15 | Photographic silver halide emulsions of increased sensitivity |
Country Status (4)
Country | Link |
---|---|
US (1) | US3212899A (en) |
BE (1) | BE621461A (en) |
DE (1) | DE1163672B (en) |
GB (1) | GB1009475A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1548395A (en) * | 1975-05-29 | 1979-07-11 | Eastman Kodak Co | Photographic materials |
US5384232A (en) * | 1991-12-02 | 1995-01-24 | E. I. Du Pont De Nemours And Company | Process for rapid access development of silver halide films using pyridinium as development accelerators |
US5252449A (en) * | 1992-09-25 | 1993-10-12 | E. I. Du Pont De Nemours And Company | Photographic silver halide emulsions with improved bright room tolerance |
FR2747806B1 (en) * | 1996-04-19 | 1998-07-03 | Kodak Pathe | NEW METHOD FOR DEVELOPING A PHOTOGRAPHIC PRODUCT WITH AN INCORPORATED DEVELOPER |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419975A (en) * | 1943-08-26 | 1947-05-06 | Eastman Kodak Co | Increasing speed and contrast of photographic emulsions |
GB845928A (en) * | 1957-10-25 | 1960-08-24 | Ilford Ltd | Improvements in or relating to photographic emulsions |
US2940851A (en) * | 1957-11-27 | 1960-06-14 | Eastman Kodak Co | Sensitization of photographic emulsions |
DE1070029B (en) * | 1958-03-31 | 1959-11-26 |
-
0
- BE BE621461D patent/BE621461A/xx unknown
-
1961
- 1961-08-17 US US132012A patent/US3212899A/en not_active Expired - Lifetime
-
1962
- 1962-07-28 DE DEE23283A patent/DE1163672B/en active Pending
- 1962-08-15 GB GB31254/62A patent/GB1009475A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3212899A (en) | 1965-10-19 |
BE621461A (en) | |
DE1163672B (en) | 1964-02-20 |
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