GB497849A - Process for obtaining positive films for motion pictures in natural colours - Google Patents
Process for obtaining positive films for motion pictures in natural coloursInfo
- Publication number
- GB497849A GB497849A GB17869/37A GB1786937A GB497849A GB 497849 A GB497849 A GB 497849A GB 17869/37 A GB17869/37 A GB 17869/37A GB 1786937 A GB1786937 A GB 1786937A GB 497849 A GB497849 A GB 497849A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- gelatine
- bath
- sodium
- sides
- 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
- G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Methods (AREA)
Abstract
497,849. Colour photography. FRANCOLOR. June 26, 1937, No. 17869. Convention date, June 27, 1936. [Class 98 (ii)] Positive kinematograph films in colours are produced by printing two series of colourrecord positive images in register on opposite sides of a film, hardening the developed film to render the gelatine insoluble, mordanting and bleaching it, applying to each side a coating consisting of a concentrated gelatine solution containing a dye, leaving this in contact with the film during part of its travel through the processing apparatus and subsequently removing it with hot water. In carrying out the process, the developed film 1 passes through a tanning bath 2 of sodium thiosulphate, chrome alum, sodium sulphite, and sodium carbonate, a mordanting bath 4 of potassium ferricyanide, sulphuric acid, and ammonium bichromate and a bath 6 of sodium bisulphite. Intermediate washing baths 3, 5, 7 are provided. The film then passes over rollers 8, 8<1> for applying the coloured gelatine to both sides and is then subjected to steam jets 10 to remove the colloid. A third colour-record image series may be added by varnishing both sides of the coloured film, e.g. with a celluloid varnish, re-sensitizing it, printing the third image series in register with the previous images and treating this as before.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR497849X | 1936-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB497849A true GB497849A (en) | 1938-12-28 |
Family
ID=8904973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17869/37A Expired GB497849A (en) | 1936-06-27 | 1937-06-26 | Process for obtaining positive films for motion pictures in natural colours |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB497849A (en) |
-
1937
- 1937-06-26 GB GB17869/37A patent/GB497849A/en not_active Expired
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