US2443909A - Process of producting multicolor photographic images in a single emulsion layer - Google Patents

Process of producting multicolor photographic images in a single emulsion layer Download PDF

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Publication number
US2443909A
US2443909A US679890A US67989046A US2443909A US 2443909 A US2443909 A US 2443909A US 679890 A US679890 A US 679890A US 67989046 A US67989046 A US 67989046A US 2443909 A US2443909 A US 2443909A
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United States
Prior art keywords
color
image
silver
layer
emulsion layer
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Expired - Lifetime
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US679890A
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English (en)
Inventor
Jr Wesley T Hanson
Thomas H Farrell
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Eastman Kodak Co
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Eastman Kodak Co
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Publication date
Priority to FR956648D priority Critical patent/FR956648A/fr
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US679890A priority patent/US2443909A/en
Priority to GB13755/47A priority patent/GB623872A/en
Application granted granted Critical
Publication of US2443909A publication Critical patent/US2443909A/en
Anticipated expiration legal-status Critical
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    • 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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials

Definitions

  • the present invention relates to color photography and particularly to a method for forming multi-color images in a single photographic emulsion layer.
  • an essential feature of. which is the successive exposure of the emulsion layer to color separation images followed by development of the residual silver halide in a color developer forming a soluble dye and rehalogenization of all of the developed silver.
  • our method enables the forma tion of a multi-color photographic image, for example, an image in three colors, in a normal silver halide emulsion layer.
  • This layer is successively exposed to light under the images which are to be recorded and if a natural color image is to be formed, it is customary to use color separation negatives for this purpose.
  • the negatives are registered in some suitable way and after each exposure, the film is developed in a color-forming developer suitable for the formation of an image representing the particular color separation-negative to which the film has been exposed. After each exposure step except the last, the film is developed in. a color-forming developer followed by a flash exposure and development in a color-forming developer which produces a soluble dye image.
  • This developer composed of the same developing agent as the color developer and of resorcinol as a coupler. forms a water-soluble dye image and develops the non-image residual silver halide to the same state as the image-forming color developer so that after rehalogenizing, the film is composed of a dye image plus a rehalogenized emulsion of uniform sensitivity characteristics. Omission of this developer leaves the grains which were used in forming the first color image in a very different state from the residual grains so that the successive exposures to the other separation images are not independent of the first image present, as they should be.
  • the coupling agents used to form the colored images may be any of the well known coupling agents such as those described in U. S. Patents 2,039,730, 2,313,586. 2,362,598, reissue 22,329, 1,969,479, 2,343,703, 2,108,602, 2,271,238- and 2,364,675.
  • the developing agents may be any of those well known in the color development art and the same developing agent need not be used for both the image-forming development and the development of the soluble dye. It is preferable however, that these developing agents be similar so that the silver images produced in different parts of the layer are similar.
  • couplers capable of forming soluble dye images may be used such as 1,3-dihydroxy-4-chlorobenzene, 2,4 dihydroxy boxylic acid, 1-p-sulfophenyl-B-methyl-5-.pyrazolone, l-p-sulfophenyl 5 pyrazolone 3 carboxylic acid, 3,5-diaminobenzoic acid, 1,3,5-triaminobenzene, 2,4,6-triaminobenzoic acid, 2,4,6- triaminochlorobenzene, diethylmalonate, barbituric acid, etc.
  • a sensitive photographic element comprising a support having thereon a silver halide emulsion layer Ill as shown in step 1 of the drawing is exposed through a red separation negative image and developed in a developing solution which produces a cyan image.
  • This forms a cyan image H in emulsion layer W as shown in step 2 of the drawing and leaves undeveloped silver halide in the unexposed portions of the emulsion layer.
  • the film is then flashed to fully expose the residual silver halide and color developed in a solution containing resorcinol or other coupler which produces a soluble dye image and metallic silver I! as shown in step 3 of the drawing.
  • the silver image in the region of the cyan dye image H and the silver image l2 are then converted to silver halide I3 as shown in step 4 of the drawing. Since both regions of the layer have been developed in a color-forming developer and reconverted to silver halide in the same bath, the silver halide in the entire emulsion layer is now uniformly light-sensitive.
  • the emulsion layer is then exposed through a green separation negative image in register with the first exposure and the emulsion layeris developed in a color-forming developer which produces a magenta image M in the emulsion layer.
  • the image 14 may coincide partially or completely with the cyan image or may be in a separate re-' gion of the emulsion layer. It is entirely inde: pendent of the cyan image previously formed in the layer.
  • the emulsion layer is again flashed with light which uniformly exposes the residual silver halide and again color developed in a color developer containing resorcinol or other coupler which produces a soluble dye image in the residual halide of the emulsion layer and metallic silver l5 as shown in step 6 of the drawing.
  • the silver is again converted to silver halide as shown as H5 in step '7 of the drawing and is thereby rendered uniformly light-sensitive as before.
  • the emulsion layer is then exposed through the blue separation negative image in register with the cyan and magenta images previously formed in the layer and developed in a yellow color-forming developer to form the yellow image I! as shown in step 8 of the drawing.
  • the silver images are then removed leaving the cyan, magenta and yellow images ll, l4 and IT in the emulsion layer.
  • the process of color photography which comprises exposing a silver halide emulsion layer toa color component image, developing the layer in a color-forming developer which forms a silver and insoluble dye image, uniformly exposing said layer and developing all residual silver halide in a color-forming developer of substan tially the same composition and containing the same developing agent as said first-mentioned developer, which forms a silver and soluble dye image, Washing the soluble dye from the layer, rehalogenizing all developed silver to silver halide, and repeating the steps of exposure to a color component image and development in a color-forming developer forming an insoluble dye image with at least one other color component image, and removing all developed silver images from the layer.
  • the process of color photography which comprises exposing a silver halide emulsion layer to a color component image, developing the layer in a color-forming developer which forms a silver and insoluble cyan dye image, uniformly exposing said layer and developing all residual silver halide in a color-forming developer of substantially the same composition and containing the same developing agent as said first-mentioned developer, which forms a silver and soluble dye image, washing the soluble dye from the layer, rehalogenizing all developed silver to silver halide, exposing the layer to a second color component image in register with the first image,
  • the process or color photography which comprises exposing a silver halide emulsion layer to a red color component image, developing the layer in a color-forming developer which forms a silver and insoluble cyan dye image, uniformly exposing said layer and developing all residual silver halide in a color-forming developer which contains resoncinol as a coupler which has substantially the same composition and contains the same developing agent as said first-mentioned developer, and which forms a silver and soluble dye image, washing the soluble dye from the layer, rehalogenizing all developed silver to silver halide, exposing the layer to a green color component image, developing the layer in a colorforming developer which forms a silver and insoluble magenta dye image, uniformly exposing said layer and developing all residual silver haldeveloping the layer in a color-forming developer which forms silver and insoluble magenta dye image, uniformly exposing said layer and developing all residual silver halide in a colorforming developer of substantially the same composition and containing the same developing agent as said first-mentioned developer,
  • a color-forming developer which contains resorcin-ol as a coupler which has substantially the same composition and contains the same developing agent as said first-mentioned developer, and which forms a silver and soluble dye image
  • Washing the soluble dye from the layer rehalogenizing all developed silver to silver halide, exposing the layer to a blue color component image, developing the layer in a color-forming developer which forms a silver and insoluble yellow dye image and removing all developed silver images from the layer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US679890A 1946-06-28 1946-06-28 Process of producting multicolor photographic images in a single emulsion layer Expired - Lifetime US2443909A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR956648D FR956648A (en(2012)) 1946-06-28
US679890A US2443909A (en) 1946-06-28 1946-06-28 Process of producting multicolor photographic images in a single emulsion layer
GB13755/47A GB623872A (en) 1946-06-28 1947-05-22 Improvements in multi-colour photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US679890A US2443909A (en) 1946-06-28 1946-06-28 Process of producting multicolor photographic images in a single emulsion layer

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US2443909A true US2443909A (en) 1948-06-22

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US (1) US2443909A (en(2012))
FR (1) FR956648A (en(2012))
GB (1) GB623872A (en(2012))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509232A (en) * 1945-11-28 1950-05-30 British Tricolour Processes Lt Color photography
US2555681A (en) * 1945-11-28 1951-06-05 Coote Jack Howard Process for the production of multicolor photographic images
DE967543C (de) * 1955-05-07 1957-11-21 C Schleussner Fotowerke G M B Verfahren zur Herstellung photographischer direkt-positiver Ein- und Mehrfarbenbilder mittels chromogener Entwicklung
US4126461A (en) * 1977-06-13 1978-11-21 Eastman Kodak Company Black-and-white photographic elements and processes

Citations (4)

* Cited by examiner, † Cited by third party
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
US2210905A (en) * 1935-12-06 1940-08-13 Gen Aniline & Film Corp Production of photographic multicolor pictures
US2244589A (en) * 1938-10-31 1941-06-03 Yanket Louis Photographic color process
US2336243A (en) * 1941-07-08 1943-12-07 Eastman Kodak Co Color correction mask

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
US2210905A (en) * 1935-12-06 1940-08-13 Gen Aniline & Film Corp Production of photographic multicolor pictures
US2244589A (en) * 1938-10-31 1941-06-03 Yanket Louis Photographic color process
US2336243A (en) * 1941-07-08 1943-12-07 Eastman Kodak Co Color correction mask

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509232A (en) * 1945-11-28 1950-05-30 British Tricolour Processes Lt Color photography
US2555681A (en) * 1945-11-28 1951-06-05 Coote Jack Howard Process for the production of multicolor photographic images
US2592864A (en) * 1945-11-28 1952-04-15 Dufay Chromex Ltd Color photography
DE967543C (de) * 1955-05-07 1957-11-21 C Schleussner Fotowerke G M B Verfahren zur Herstellung photographischer direkt-positiver Ein- und Mehrfarbenbilder mittels chromogener Entwicklung
US4126461A (en) * 1977-06-13 1978-11-21 Eastman Kodak Company Black-and-white photographic elements and processes

Also Published As

Publication number Publication date
FR956648A (en(2012)) 1950-02-02
GB623872A (en) 1949-05-24

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