US2219988A - Light-sensitive multilayer photographic material and process for making the same - Google Patents

Light-sensitive multilayer photographic material and process for making the same Download PDF

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Publication number
US2219988A
US2219988A US243888A US24388838A US2219988A US 2219988 A US2219988 A US 2219988A US 243888 A US243888 A US 243888A US 24388838 A US24388838 A US 24388838A US 2219988 A US2219988 A US 2219988A
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United States
Prior art keywords
light
silver
dye
layers
layer
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Expired - Lifetime
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US243888A
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English (en)
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Gaspar Bela
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Individual
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Individual
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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
    • G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/145—Infrared

Definitions

  • Photographic multilayer materials for color photographic purposes are known in which some or all of the various light sensitive layers contain, priorto exposure, the dye necessary for the formation of the final image. After exposure of the light sensitive layers, they are converted into colored pictures by local removal of the dyestuff. If two or inore layers are arranged upon the same support, it is necessary to sensitize at least two of the layers for differently colored light in order to produce the desired color selection picture in each individual layer with light corresponding to the sensitivity.
  • At least one of the layers contains the image forming dyestuff in a concentration higher than that required at the most intensely colored points of the image.
  • the surplus of 'dyestufi acts as a screening dye and either prevents the light to which the layeris not to be exposed from entering the layer or in other cases the surplus of dyestuif prevents the light to which the layer is to be exposed from reaching the bottom of the layer and from entering the next following layer.
  • the surplus of the image forming dye is removed by a bleaching process of the same kind as used for the local bleaching of the dyestuff at the points where a silver image has been produced by developing.
  • the surplus of dyestuff is to be removed in a uniform manner as distinguished from the image-like removal of the dyestufl at the points of the silver deposit corre-' sponding to the image.
  • the colored emulsion is exposed to a diffuse illumination of a certain intensity which corresponds to the surplus of dyestuff and the larger the amount of dyestulf, the 40 higher the. intensity of illumination.
  • the uniform exposure occurs beforethe development of the material or even before the image-forming exposure of the layer.
  • the use of a fogged emulsion has the same effect and the degree of, fog may be determined by tests so that it is sufficient for a decrease of the dyestuff concentration from its original value to that corresponding to the color intensity required at the most intensely colored parts of the final multicolor image.
  • a fogged emulsion one containing a, corresponding amount of exposed and developed silver halide or colloidal silver may be used. It is furthermore possible to produce a uniform blackening of the layer or layers by a uniform illumination with light to which.
  • the layer is specifically sensitised, and several layers can simultaneously be illuminated with such light.
  • ExampZa- -AS shown in the drawing a film is used comprising on one side of the support a blue-green emulsion sensitive to blue 5 and on the other side a yellow emulsion sensitised to red and amagenta dyed emulsion sensitised to blue.
  • the dyestuffs used are:
  • the concentration of the yellow dye is raised to about 1.8 g, per sq. m.
  • the yellow emulsion is either fogged or is illuminated to such an extent that during the treatment of the material by a 5 per cent acid thiocarbamide solution the yellow dyestuif is reduced to a concentration of about 1.2 g.
  • the two other layers may also contain the dyestuffs in excess of that given above and all of the layers or those containing more dyestufi than required in the final image may be sensitised to infra-red light so that by onedifiuse illumination the quantity of silver may be produced which is necessary to 5 reduce .the dyestuff concentration to the required degree.
  • the yellow dyed layer may, for example, contain cryptocyanine as a. sensitizer for infra-red. After exposure and development the various silver im- 40 ages in the three layers are transformed into dye-images by 5% hydrobromic acid or acid thiocarbamide solutions.
  • a light-sensitive multilayer photographic material comprising a support and a plurality of superposed silver halide emulsion layers, at
  • a light-sensitive multilayer photographic material comprising a support and a plurality of superposed silver'halide emulsion layers, at least one of the layers being dyed to a color density higher.
  • a light-sensitive multilayer photographic material comprising a support and a-plurality of superposed silver halide emulsion layers including at least two differentially sensitizedto predetermined spectral ranges, at least one of the lay- ,ers being dyed to a color density higher than that required at the most intensely colored points of the image by a dye which is fast to ordinary photographic treating solutions but capable of being locally bleached in the presence of metallic silver, said layer containing an excess of uniformly distributed silver in the form of light-sensitive silver salt and a sensitizer for selective exposure of said silvert salt to a spectral range different from said predetermined spectral ranges, said excess amount of said silver corresponding .to the surplus of dye.
  • a light-sensitive multilayer photographic material comprising a support and a plurality of superposed silver halide emulsion layers, at least one of the layers being dyed to a color density materially higher than that required at the most intensely colored points of the image by a dye which is fast to ordinary photographic treating solutions but capable of being locally bleached in the presence of metallic silver by a dye destroying agent, said layer containing an excess of uniformly distributed available silver, said excess amount of said available silver corresponding to the surplus of dye for uniformly'reducing the color density of said dyed layer to an amount substantially equal to that needed to reproduce the most intensely colored points of the image by said dye.
  • a process for producing multicolor photographic images from a light-sensitive-multilayer photographic material comprising a support and a plurality of superposed silver halide emulsion layers, at least one of said silver halide emulsion layers being dyed to a color density materially higher than that required at the most intensely colored points of the image by a dye which is fast to ordinary photographic treating solutions but capable of being locally bleached in the presence of metallic silver by a dye destroying agent,

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
US243888A 1937-12-09 1938-12-03 Light-sensitive multilayer photographic material and process for making the same Expired - Lifetime US2219988A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB34082/37A GB507152A (en) 1937-12-09 1937-12-09 Light-sensitive multilayer photographic material
GB34081/37A GB507211A (en) 1937-12-09 1937-12-09 Coloured photographic multilayer material

Publications (1)

Publication Number Publication Date
US2219988A true US2219988A (en) 1940-10-29

Family

ID=26262147

Family Applications (3)

Application Number Title Priority Date Filing Date
US243886A Expired - Lifetime US2219987A (en) 1937-12-09 1938-12-03 Multilayer material for color photography and method of making the same
US243888A Expired - Lifetime US2219988A (en) 1937-12-09 1938-12-03 Light-sensitive multilayer photographic material and process for making the same
US313121A Expired - Lifetime US2316782A (en) 1937-12-09 1940-01-09 Process of producing multicolor images

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US243886A Expired - Lifetime US2219987A (en) 1937-12-09 1938-12-03 Multilayer material for color photography and method of making the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
US313121A Expired - Lifetime US2316782A (en) 1937-12-09 1940-01-09 Process of producing multicolor images

Country Status (4)

Country Link
US (3) US2219987A (enEXAMPLES)
BE (1) BE431547A (enEXAMPLES)
FR (1) FR847292A (enEXAMPLES)
GB (2) GB507152A (enEXAMPLES)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567712A (en) * 1945-06-07 1951-09-11 Du Pont Element for recording photographic images
US2609294A (en) * 1952-09-02 Cinematographic matte
US2685510A (en) * 1951-11-14 1954-08-03 Eastman Kodak Co Sensitive photographic element for use in the silk screen process

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434272A (en) * 1944-05-03 1948-01-13 Eastman Kodak Co Color photography with azosubstituted couplers
US2428208A (en) * 1945-06-20 1947-09-30 Eastman Kodak Co Dichromate bleach bath containing a wetting agent and method of bleaching therewith
US2511112A (en) * 1945-09-12 1950-06-13 Du Pont Process for obtaining color separations from multilayer photographic film
BE542606A (enEXAMPLES) * 1955-12-23
BE567236A (enEXAMPLES) * 1957-05-15

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609294A (en) * 1952-09-02 Cinematographic matte
US2567712A (en) * 1945-06-07 1951-09-11 Du Pont Element for recording photographic images
US2685510A (en) * 1951-11-14 1954-08-03 Eastman Kodak Co Sensitive photographic element for use in the silk screen process

Also Published As

Publication number Publication date
GB507152A (en) 1939-06-09
BE431547A (enEXAMPLES) 1939-01-31
US2219987A (en) 1940-10-29
GB507211A (en) 1939-06-09
US2316782A (en) 1943-04-20
FR847292A (fr) 1939-10-05

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