GB553879A - Production of coloured photographic images - Google Patents
Production of coloured photographic imagesInfo
- Publication number
- GB553879A GB553879A GB1570741A GB1570741A GB553879A GB 553879 A GB553879 A GB 553879A GB 1570741 A GB1570741 A GB 1570741A GB 1570741 A GB1570741 A GB 1570741A GB 553879 A GB553879 A GB 553879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dye
- layer
- destruction
- yellow
- acid
- 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
- G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
553,879. Coloured photographic images. TULL, A. G. Dec. 5, 1941, No. 15707. [Class 98 (ii)] A silver halide emulsion layer is weakly dyed with an acid dye during manufacture, and treated after exposure, development, and dye-destruction with a solution of a basic dye to form a dye lake image of normal intensity. The basic dye solution may be applied after exposure but before dye-destruction. Suitable basic dyes are Auramine, Acronol Yellow and Rhodamine, and a suitable acid dye Metanil yellow. In the dye-destruction process, an acid dye is used which permanently stains the layer ; alternatively a precipitating agent is present in the layer. A blue sensitive silver halide emulsion containing Metanil Yellow is after exposure and development processed by the dye-destruction process, e.g. using a thiourea-sulphuric acid dye-destruction bath, or using a calcium hypochlorite-acetic acid bath to destroy the dye at the points free of silver. The layer is treated with a solution of Auramine or Acronol Yellow, which is precipitated imagewise, and the layer is washed. The basic dye may be of a different colour from the acid dye. The images in other layers of multilayer material may be processed by chemical toning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1570741A GB553879A (en) | 1941-12-05 | 1941-12-05 | Production of coloured photographic images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1570741A GB553879A (en) | 1941-12-05 | 1941-12-05 | Production of coloured photographic images |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB553879A true GB553879A (en) | 1943-06-09 |
Family
ID=10064022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1570741A Expired GB553879A (en) | 1941-12-05 | 1941-12-05 | Production of coloured photographic images |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB553879A (en) |
-
1941
- 1941-12-05 GB GB1570741A patent/GB553879A/en not_active Expired
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