GB553377A - Improvements in or relating to the production of three-coloured cinematographic films - Google Patents
Improvements in or relating to the production of three-coloured cinematographic filmsInfo
- Publication number
- GB553377A GB553377A GB14655/41A GB1465541A GB553377A GB 553377 A GB553377 A GB 553377A GB 14655/41 A GB14655/41 A GB 14655/41A GB 1465541 A GB1465541 A GB 1465541A GB 553377 A GB553377 A GB 553377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- image
- blue
- green
- bath
- dye
- 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
- G03C7/26—Silver halide emulsions for subtractive colour processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
553,377. Colour photography. COOTE, J. H. Nov. 14, 1941, No. 14655. Drawings to Specification. [Class 98 (ii)] A multicolour image comprises, in different strata of a single silver halide emulsion layer provided with a gelatin or like supercoating, a magenta image of a nickel compound of a dialkylglyoxime and an insoluble metal salt image mordanted with a basic yellow dye, and in the supercoating a blue-green ferro-ferricyanide image produced by cyanotype sensitization. It is produced by printing in different strata of the emulsion layer images developed to silver from blue and green colour separation negatives, converting the green record print to the magenta dialkyglyoxime image, converting the blue record print to the yellow mordant dye image, sensitizing the supercoating with a cyanotype sensitizer, and printing and developing the blue-green image therein from a red separation negative or positive. In an example, an ordinary film comprising a transparent base, bearing a silver halide emulsion layer incorporating a fugitive yellow dye such as tartrazine is exposed through the base to the green-record negative. The latent image, which is restricted by the yellow dye to the lowermost stratum, is developed with an ordinary metolhydroquinone developer and washed, whereafter the silver image is bleached to a combination of nickel and silver ferrocyanides in a bath confaining potassium ferricyanide and a soluble nickel salt. The film is washed and dried, exposed from the front to the blue-record negative, and the latent image is developed in the upper stratum only by means of a metol-hydroquinone developer loaded as with sodium sulphate to control its rate of penetration. After treatment in a stop bath, an acid fixing bath, and washing, the second image is converted into a mordant for basic dye, e.g. silver iodide or other halide, or a waterinsoluble salt of copper, chromium or iron, washed, dyed yellow as with auramine, thioflavine, or chrysoidin, and washed free from excess of dye. The first image is now toned magenta in an alkaline bath containing dimethylglyoxime, followed by washing and drying. The supercoating is sensitized with a cyanotype sensitizer which is concentrated and of high speed to limit its penetration, e.g. one containing ferric ammonium citrate (or ferric chloride), potassium ferricyanide, and oxalic (or tartaric) acid, exposed to the red-record negative, and the latent image is developed blue-green with water. In another example, the film is exposed through the base to the blue-record negative, developed but not fixed, exposed from the front to the green-record negative, developed and fixed ; the second image is bleached in the aforementioned nickel bath loaded, however, with glycerine or sodium sulphate to limit its action to that image only ; the first image is dye-toned yellow; the bleached second image is toned magenta in the dimethylglyoxime bath ; and thereafter the blue-green image is produced in the supercoating by the cyanotype process as before. The method of producing the blue-green image may in either case be varied by sensitizing with a bath containing ferric chloride and oxalic acid, and developing, after exposure to the negative, with a substance yielding a ferro-ferricyanide, e.g. a potassium ferricyanide bath. A further variation consists in exposing to a red-record positive, and developing in a bath of potassium ferrocyanide. A filter dye less fugitive than tartrazine, e.g. Brilliant Yellow, may be used in the emulsion layer if this is thin, so that the dye is not completely eliminated in the first washing, and the residue assists in restricting the depth of exposure when producing the second image. Formulae for the various baths are given. The invention may be used in the production of still photographs or kinematograph films.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14655/41A GB553377A (en) | 1941-11-14 | 1941-11-14 | Improvements in or relating to the production of three-coloured cinematographic films |
US534756A US2415626A (en) | 1941-11-14 | 1944-05-09 | Production of three-colour subtractive photographic images |
FR927416D FR927416A (en) | 1941-11-14 | 1946-05-27 | Improvements in the production of trichromatic photographic images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14655/41A GB553377A (en) | 1941-11-14 | 1941-11-14 | Improvements in or relating to the production of three-coloured cinematographic films |
Publications (1)
Publication Number | Publication Date |
---|---|
GB553377A true GB553377A (en) | 1943-05-19 |
Family
ID=10045167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14655/41A Expired GB553377A (en) | 1941-11-14 | 1941-11-14 | Improvements in or relating to the production of three-coloured cinematographic films |
Country Status (3)
Country | Link |
---|---|
US (1) | US2415626A (en) |
FR (1) | FR927416A (en) |
GB (1) | GB553377A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE479270A (en) * | 1945-11-28 | |||
US2555681A (en) * | 1945-11-28 | 1951-06-05 | Coote Jack Howard | Process for the production of multicolor photographic images |
US2587841A (en) * | 1947-10-06 | 1952-03-04 | Cinecolor Corp | Photographic toning and resensitizing process |
US2930691A (en) * | 1955-03-28 | 1960-03-29 | Technicolor Corp | Planographic dye-absorptive film and method of making same |
DE1522418A1 (en) * | 1966-12-20 | 1969-07-31 | Agfa Gevaert Ag | Process for producing multicolor reproductions by the subtractive process |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1976301A (en) * | 1931-11-12 | 1934-10-09 | Eastman Kodak Co | Method of producing a plurality of colored images in a single photographic emulsion layer |
US1993576A (en) * | 1933-08-10 | 1935-03-05 | Cambridge Trust Company | Monopack process |
US2171609A (en) * | 1936-01-18 | 1939-09-05 | Technico Inc | Toning photographic prints |
-
1941
- 1941-11-14 GB GB14655/41A patent/GB553377A/en not_active Expired
-
1944
- 1944-05-09 US US534756A patent/US2415626A/en not_active Expired - Lifetime
-
1946
- 1946-05-27 FR FR927416D patent/FR927416A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2415626A (en) | 1947-02-11 |
FR927416A (en) | 1947-10-29 |
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