GB397489A - An improved method of producing multi-colour photographic images - Google Patents
An improved method of producing multi-colour photographic imagesInfo
- Publication number
- GB397489A GB397489A GB4447/32A GB444732A GB397489A GB 397489 A GB397489 A GB 397489A GB 4447/32 A GB4447/32 A GB 4447/32A GB 444732 A GB444732 A GB 444732A GB 397489 A GB397489 A GB 397489A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- elements
- base
- indigosol
- blue
- 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
- G03C7/06—Manufacture of colour screens
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Developers In Electrophotography (AREA)
Abstract
397,489. Colour photography. GERDANOVITS, V. VON, 2, Scudier Platz, Temesvar, Roumania. Feb. 15, 1932, No. 4447. Convention date, Feb. 17, 1931. [Class 98 (ii).] A method of producing emulsion screens for colour photography is characterized in that different emulsions are applied in screen form to a base, of which emulsions the one pertaining to a particular colour, for example, blue, possesses a total sensitiveness which is greater than those of the remaining colours to such an extent that the amount of light which is necessary for producing the image in the blue elements. of the screen is without effect on the remaining emulsion screen elements pertaining to the other colours. The screen may be produced by applying the screen elements to an elastic base as described in Specification 358,187, and transferring to the final screen carrier. The emulsion may be thickened by the addition of dextrine, sugar, gum arabic, albumen or the like, while collodion emulsions may be thickened with resins or artificial resins. A yellow protective dyestuff such as auramine G may be added to the red and green elements of the screen. This dyestuff may be removed eventually by dissolving out in water and the residual traces expelled by treatment with an aqueous solution of hydrogen peroxide. The red screen elements are dyed with indigosol scarlet H.B., the green with indigosol green A.B., and the blue with indigosol 04B. These dyestuffs are fixed by the addition of sodium nitrate and subsequent treatment with a solution of sulphuric acid. The silver image may be toned by platinum, gold, sulphur, selenium or other baths, or with a suitable dye after bleaching in a bath of potassium ferrocyanide. Iron oxalate may be the developer. Paper for the base may be impregnated with resin, wax, bitumen, artificial resins, paraffin, or may be attached to metal foil. White opal glass, porcelain, or chromium-plated iron or aluminium may also be employed as base.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE397489X | 1931-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB397489A true GB397489A (en) | 1933-08-15 |
Family
ID=6397225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4447/32A Expired GB397489A (en) | 1931-02-17 | 1932-02-15 | An improved method of producing multi-colour photographic images |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB397489A (en) |
-
1932
- 1932-02-15 GB GB4447/32A patent/GB397489A/en not_active Expired
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