GB380778A - Improvements in and relating to the production of separation negatives for colourprinting from photographic regularpattern colourscreen negatives - Google Patents
Improvements in and relating to the production of separation negatives for colourprinting from photographic regularpattern colourscreen negativesInfo
- Publication number
- GB380778A GB380778A GB1486031A GB1486031A GB380778A GB 380778 A GB380778 A GB 380778A GB 1486031 A GB1486031 A GB 1486031A GB 1486031 A GB1486031 A GB 1486031A GB 380778 A GB380778 A GB 380778A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negatives
- negative
- stop
- sensitized
- bichromate
- 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
- G03C7/04—Additive processes using colour screens; Materials therefor; Preparing or processing such materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Methods (AREA)
Abstract
380,778. Colour photography. LAUDER, W. DE L. and BECKERT; F., 160, New Bond Street, London. May 20, 1931, No. 14860. [Class 98 (ii).] Separate colour record printing negatives are prepared from a master colour screen negative by the use of a very thin stop-out screen. In one method, the master negative is soaked in a 1/1 glycerine-water solution and is brought into contact and alignment with a stop-out screen made on a very thin celluloid or other flexible film ; an emulsion plate, sensitized with bichromate, is exposed behind the film. According to a second method, the stop-out screen pattern is printed upon a plate sensitized with a 2 per cent solution of potassium bichromate, which is washed, developed, re-washed and re-sensitized with a 4 per cent bichromate solution ; after drying, the plate is registered with the master negative and again exposed. In a third method, the stop-out screen is printed in register on the master negative in greasy ink and a plate sensitized with 3-4 per cent bichromate exposed thereunder to obtain a colour record negative. The ink screen is then removed and the process repeated for the other colour record negatives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1486031A GB380778A (en) | 1931-05-20 | 1931-05-20 | Improvements in and relating to the production of separation negatives for colourprinting from photographic regularpattern colourscreen negatives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1486031A GB380778A (en) | 1931-05-20 | 1931-05-20 | Improvements in and relating to the production of separation negatives for colourprinting from photographic regularpattern colourscreen negatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB380778A true GB380778A (en) | 1932-09-20 |
Family
ID=10048772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1486031A Expired GB380778A (en) | 1931-05-20 | 1931-05-20 | Improvements in and relating to the production of separation negatives for colourprinting from photographic regularpattern colourscreen negatives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB380778A (en) |
-
1931
- 1931-05-20 GB GB1486031A patent/GB380778A/en not_active Expired
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