GB761014A - Improvements in and relating to light-sensitive photographic silver halide emulsions - Google Patents
Improvements in and relating to light-sensitive photographic silver halide emulsionsInfo
- Publication number
- GB761014A GB761014A GB2455354A GB2455354A GB761014A GB 761014 A GB761014 A GB 761014A GB 2455354 A GB2455354 A GB 2455354A GB 2455354 A GB2455354 A GB 2455354A GB 761014 A GB761014 A GB 761014A
- Authority
- GB
- United Kingdom
- Prior art keywords
- emulsion
- silver halide
- coated
- enzyme
- relating
- 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
- G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
- G03C1/047—Proteins, e.g. gelatine derivatives; Hydrolysis or extraction products of proteins
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)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
Abstract
761,014. Photographic emulsions. HALDEN & CO., Ltd., J., and HOLDEN, J. Aug. 24, 1954. No. 24553/54. Class 98(2) In the process of preparing a photographic element, a gelatine silver halide emulsion is treated with an enzyme to degrade the gelatine before the emulsion is: coated on to a support. The treatment enables the coated emulsion to be heat-dried. Binding agents such as a partially hydrolyzed acrylic acid-vinyl acetate copolymer or other natural or synthetic resin or an aqueous emulsion of a wax may be added to the enzyme-treated emulsion. The viscosity of the coating may be adjusted by adding methyl cellulose to the emulsion. Enzymes specified are trypsin, erepsin and pepsin, and bacteria may be used to produce the enzymes in situ. In an example, tripsin is added to a shredded, washed, silver halide emulsion in gelatin at a pH of 7 to 8 and a temperature of 35 ‹C. After addition of an aqueous dispersion of a vinyl copolymer, the emulsion is coated on paper and dried at 60-70‹C. Specification 258,237 [Class 98(ii)] is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2455354A GB761014A (en) | 1954-08-24 | 1954-08-24 | Improvements in and relating to light-sensitive photographic silver halide emulsions |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2455354A GB761014A (en) | 1954-08-24 | 1954-08-24 | Improvements in and relating to light-sensitive photographic silver halide emulsions |
| GB2555354 | 1954-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB761014A true GB761014A (en) | 1956-11-07 |
Family
ID=26257172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2455354A Expired GB761014A (en) | 1954-08-24 | 1954-08-24 | Improvements in and relating to light-sensitive photographic silver halide emulsions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB761014A (en) |
-
1954
- 1954-08-24 GB GB2455354A patent/GB761014A/en not_active Expired
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