GB628757A - Improvements in the production of gelatin - Google Patents
Improvements in the production of gelatinInfo
- Publication number
- GB628757A GB628757A GB35239/46A GB3523946A GB628757A GB 628757 A GB628757 A GB 628757A GB 35239/46 A GB35239/46 A GB 35239/46A GB 3523946 A GB3523946 A GB 3523946A GB 628757 A GB628757 A GB 628757A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gelatine
- treatment
- aqueous solution
- per cent
- alkali
- 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)
- Removal Of Specific Substances (AREA)
Abstract
Gelatine is deaminated by suspending it, preferably in flake form, in an aqueous solution of nitrous acid having a pH of 3.8-4.7 at such a temperature that the gelatine does not dissolve or swell to the point of imbibing more than ten times its weight of water until its isoelectric point is reduced to approximately pH 4. The starting-material is preferably alkali or lime processed gelatine having an isoelectric point 4.7-5.1. The nitrous acid amounts to not more than 40 per cent of the gelatine. The treated gelatine is decolourized by treatment with a reducing agent, preferably sodium hydrosulphite in 1 per cent aqueous solution, and is resolubilized by simultaneous or subsequent treatment with a dilute, aqueous solution of an alkali, e.g. a 0.1 per cent solution of sodium hydroxide, this treatment also serving to remove any anionic ash constituents. After washing with distilled water cationic ash constituents are removed by treatment with acidified water, e.g. dilute acetic acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US628757XA | 1945-11-27 | 1945-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB628757A true GB628757A (en) | 1949-09-05 |
Family
ID=22045418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35239/46A Expired GB628757A (en) | 1945-11-27 | 1946-11-27 | Improvements in the production of gelatin |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR944300A (en) |
| GB (1) | GB628757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113896785A (en) * | 2021-09-14 | 2022-01-07 | 罗赛洛(温州)明胶有限公司 | Preparation method of anti-crosslinking gelatin |
-
1946
- 1946-11-25 FR FR944300D patent/FR944300A/en not_active Expired
- 1946-11-27 GB GB35239/46A patent/GB628757A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113896785A (en) * | 2021-09-14 | 2022-01-07 | 罗赛洛(温州)明胶有限公司 | Preparation method of anti-crosslinking gelatin |
| CN113896785B (en) * | 2021-09-14 | 2023-09-08 | 罗赛洛(温州)明胶有限公司 | Preparation method of anti-crosslinking gelatin |
Also Published As
| Publication number | Publication date |
|---|---|
| FR944300A (en) | 1949-03-31 |
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