GB408085A - Process of hardening gelatin - Google Patents
Process of hardening gelatinInfo
- Publication number
- GB408085A GB408085A GB4788/33A GB478833A GB408085A GB 408085 A GB408085 A GB 408085A GB 4788/33 A GB4788/33 A GB 4788/33A GB 478833 A GB478833 A GB 478833A GB 408085 A GB408085 A GB 408085A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gelatin
- organic
- inorganic acid
- glyoxal
- employed
- 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
- G03C1/30—Hardeners
- G03C1/301—Aldehydes or derivatives thereof, e.g. bisulfite addition products
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Gelatin is hardened with the use of a derivative of a dialdehyde in which each aldehyde group is transformed into a group of the formula <FORM:0408085/IV/1> where X = hydrogen or the acid radical of any organic or inorganic acid, and Y = the acid radical of any organic or inorganic acid. The gelatin must not have a higher acidity than pH = 4, and when employed as photographic material, hardens in two stages, the second occurring during development of the exposed product. The hardening agent is added in aqueous solution, in the proportion of about .2--5 gms. per 100 gms. gelatin. According to examples glyoxal-sodium bisulphite and tetracetate are employed in gelatino-silver-halide emulsions, in which the gelatine has pH = 6 and 7 respectively.ALSO:Gelatin for photographically-sensitive layers is hardened with the use of a derivative of a dialdehyde in which the aldehyde groups have been transformed into groups of the formula <FORM:0408085/V/1> - in which X represents hydrogen or the acid radical of any organic or inorganic acid, and Y = the acid radical of any organic or inorganic acid. According to examples, gelatin-silver halide emulsions of pH = 6 and 7 are mixed with aqueous solutions of glyoxal-sodium bisulphide and glyoxal tetracetate respectively and cast on to supports. The gelatine must not have a higher acidity than pH = 4, and when it is employed as photographic material hardens in two stages, the second occurring during development of the exposed film or plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI43763D DE585920C (en) | 1932-02-16 | 1932-02-16 | Process for hardening photographic layers, in particular photographic gelatin layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB408085A true GB408085A (en) | 1934-04-05 |
Family
ID=6422248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4788/33A Expired GB408085A (en) | 1932-02-16 | 1933-02-16 | Process of hardening gelatin |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1941852A (en) |
| BE (1) | BE394394A (en) |
| DE (1) | DE585920C (en) |
| FR (1) | FR43111E (en) |
| GB (1) | GB408085A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2663639A (en) * | 1950-01-28 | 1953-12-22 | Harris Seybold Co | Printing plate preparation |
| US3103437A (en) * | 1959-04-10 | 1963-09-10 | Hardening | |
| US3212895A (en) * | 1960-12-20 | 1965-10-19 | Eastman Kodak Co | Stability of rapid-processed photographic materials |
-
0
- BE BE394394D patent/BE394394A/xx unknown
-
1932
- 1932-02-16 DE DEI43763D patent/DE585920C/en not_active Expired
-
1933
- 1933-02-10 US US656196A patent/US1941852A/en not_active Expired - Lifetime
- 1933-02-16 FR FR43111D patent/FR43111E/en not_active Expired
- 1933-02-16 GB GB4788/33A patent/GB408085A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR43111E (en) | 1934-02-12 |
| BE394394A (en) | |
| DE585920C (en) | 1933-10-12 |
| US1941852A (en) | 1934-01-02 |
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