GB324043A - Improvements in or relating to colour photography - Google Patents
Improvements in or relating to colour photographyInfo
- Publication number
- GB324043A GB324043A GB2290628A GB2290628A GB324043A GB 324043 A GB324043 A GB 324043A GB 2290628 A GB2290628 A GB 2290628A GB 2290628 A GB2290628 A GB 2290628A GB 324043 A GB324043 A GB 324043A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- elements
- master
- multicolour
- intensified
- 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)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
324,043. Baker, T. T. Aug. 8, 1928. Colour photography, multicolour-screen processes for.-To reduce white hue in printing from a multicolour-screen master transparency on to a multicolour-screen material, the silver deposit in the master transparency is selectively intensified. The master transparency is treated with a reducer such as ferricyanide, which preferentially removes silver from the low densities, and then intensified. For example, where the master transparency has been exposed to green light, a small amount of silver will be exposed behind the red and violet elements of the screen. When intensified as above and reversed, the red and violet elements will be opaque and undiluted green will be transmitted by the green elements. White hue may be further reduced by selecting and concentrating the dyestuffs forming the screen for the positive material (or, according to the Provisional Specification, the master film), so that the spectral bands of colour transmitted by the screen elements do not overlap. The grain size and contrast of the two emulsions are preferably as described in Specification 322,231. The Provisional Specification describes also a method of printing by parallel rays of light. Specifications 4993/07, 217,557, and 322,432 also are referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2290628A GB324043A (en) | 1928-08-08 | 1928-08-08 | Improvements in or relating to colour photography |
| FR667505D FR667505A (en) | 1928-08-08 | 1929-01-16 | Improvements in color photography |
| DEW81556D DE545556C (en) | 1928-08-08 | 1929-01-25 | Process for the reproduction of transparent color raster images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2290628A GB324043A (en) | 1928-08-08 | 1928-08-08 | Improvements in or relating to colour photography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB324043A true GB324043A (en) | 1930-01-08 |
Family
ID=10186972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2290628A Expired GB324043A (en) | 1928-08-08 | 1928-08-08 | Improvements in or relating to colour photography |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE545556C (en) |
| FR (1) | FR667505A (en) |
| GB (1) | GB324043A (en) |
-
1928
- 1928-08-08 GB GB2290628A patent/GB324043A/en not_active Expired
-
1929
- 1929-01-16 FR FR667505D patent/FR667505A/en not_active Expired
- 1929-01-25 DE DEW81556D patent/DE545556C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR667505A (en) | 1929-10-17 |
| DE545556C (en) | 1932-03-02 |
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