GB520528A - Improvements in colour photographic developers and colour photographic development processes - Google Patents
Improvements in colour photographic developers and colour photographic development processesInfo
- Publication number
- GB520528A GB520528A GB2204738A GB2204738A GB520528A GB 520528 A GB520528 A GB 520528A GB 2204738 A GB2204738 A GB 2204738A GB 2204738 A GB2204738 A GB 2204738A GB 520528 A GB520528 A GB 520528A
- Authority
- GB
- United Kingdom
- Prior art keywords
- colour
- naphthol
- developer
- colour photographic
- processed
- 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/407—Development processes or agents therefor
- G03C7/413—Developers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
520,528. Colour photography. KODAK, Ltd., and JELLEY, E. E. July 25, 1938, No. 22047. [Class 98 (ii)] A colour developer contains an aromatic amino developing agent, such as p-dimethylaminoaniline, 2-amino-5-diethylaminotoluene, or p-aminophenol, a colour former, such as a chlorinated phenol, an unsubstituted or substituted naphthol such as 2:4-dichlor-α-naphthol, a dihydroxy naphthol, such as 1: 5-dihydroxynaphthalene, or a pyrazolone, and a primary aliphatic amine, such as ethylendiamine, or ethanolamine, the amine being present in a concentration sufficiently small not to increase the time of penetration of the developer, but sufficiently large to give better colour saturation in the resulting coloured images. One or more silver salt images in two or more emulsion layers on the same side of the support may be processed by the developer, or the bottom layer of a multilayer element may be selectively processed thereby. A formula for a suitable developing composition is given. Specifications 440,032, 440,089, 447,092, 454,622 and 507,841 are referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2204738A GB520528A (en) | 1938-07-25 | 1938-07-25 | Improvements in colour photographic developers and colour photographic development processes |
| FR858210D FR858210A (en) | 1938-07-25 | 1939-07-24 | Color photography process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2204738A GB520528A (en) | 1938-07-25 | 1938-07-25 | Improvements in colour photographic developers and colour photographic development processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB520528A true GB520528A (en) | 1940-04-26 |
Family
ID=10173012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2204738A Expired GB520528A (en) | 1938-07-25 | 1938-07-25 | Improvements in colour photographic developers and colour photographic development processes |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR858210A (en) |
| GB (1) | GB520528A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170478A (en) * | 1977-06-06 | 1979-10-09 | Eastman Kodak Company | Photographic color developer compositions |
-
1938
- 1938-07-25 GB GB2204738A patent/GB520528A/en not_active Expired
-
1939
- 1939-07-24 FR FR858210D patent/FR858210A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR858210A (en) | 1940-11-20 |
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