GB272754A - Improvements in three colour photography - Google Patents
Improvements in three colour photographyInfo
- Publication number
- GB272754A GB272754A GB2720026A GB2720026A GB272754A GB 272754 A GB272754 A GB 272754A GB 2720026 A GB2720026 A GB 2720026A GB 2720026 A GB2720026 A GB 2720026A GB 272754 A GB272754 A GB 272754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- colour
- images
- bath
- record
- 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
- G03C7/46—Subtractive processes not covered by the group G03C7/26; Materials therefor; Preparing or processing such materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
272,754. Didier, L. J. B. Oct. 30, 1926. Colour photography.-A process for producing tricolour photographs of the kind wherein two plates are superimposed, one carrying one of the colour-record images and the other carrying two, and wherein the images on the second plate are produced in succession by sensitizing with bichromate, printing, developing and dyeing, is characterized in that dyes having different penetrability are used for colouring the two images on the second plate. The single image on the first plate may be produced by any process, such as the pinatype process. The second plate is coated with bichromated gelatin and, after printing under the second colour-record negative, is coloured by immersion in a dye-bath, containing for example, carmoisin red F. having a feeble penetrating action. After washing, the plate is resensitized in a bichromate bath, exposed again under the third colour-record negative and washed, and the image is coloured in a dye-bath containing, for example, mikado golden yellow, having a. stronger penetrating action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2720026A GB272754A (en) | 1926-10-30 | 1926-10-30 | Improvements in three colour photography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2720026A GB272754A (en) | 1926-10-30 | 1926-10-30 | Improvements in three colour photography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB272754A true GB272754A (en) | 1927-06-23 |
Family
ID=10255796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2720026A Expired GB272754A (en) | 1926-10-30 | 1926-10-30 | Improvements in three colour photography |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB272754A (en) |
-
1926
- 1926-10-30 GB GB2720026A patent/GB272754A/en not_active Expired
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