US2673800A - Photographic material for the manufacture of color images - Google Patents

Photographic material for the manufacture of color images Download PDF

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Publication number
US2673800A
US2673800A US767586A US76758647A US2673800A US 2673800 A US2673800 A US 2673800A US 767586 A US767586 A US 767586A US 76758647 A US76758647 A US 76758647A US 2673800 A US2673800 A US 2673800A
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US
United States
Prior art keywords
layer
silver
color
layers
sensitive
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 - Lifetime
Application number
US767586A
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English (en)
Inventor
Meeussen Louis Achilles
Bellay Albert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB2923839A external-priority patent/GB614155A/en
Application filed by Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Application granted granted Critical
Publication of US2673800A publication Critical patent/US2673800A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/02—Photosensitive materials characterised by the image-forming section
    • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
    • G03C8/045—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals with the formation of a subtractive dye image
    • 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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/02—Photosensitive materials characterised by the image-forming section
    • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
    • G03C8/06—Silver salt diffusion transfer
    • 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
    • Y10S430/142—Dye mordant

Definitions

  • RECEIVING LAYER DEvELoPMENT NucLEI+DIEFusIONFAsT YELLow COUPLER 5.
  • these layers may becoated on onesupport.
  • the sen'sitive layer and the receiving layer may be coated onto two separate After exposure, the sensitive layer is pressed upon th'e receiving layer in 1 the presence of substances; necessary for producing the posi- 'tive reversal image, either by direct reaction 'with the :difiuse'd silverhalideor by induced "reaction or-bycatalytic rea'c'tion.
  • both Substances whichspeed up the reduction of silver halide not afiected by the light in the presence of a silver halide solvent i. e. reduction and crystallisation nuclei forsilver--halide,'"and substances capable offormingsuch nucleiby reaction with silver halide, may be mixed in" the sensitive-layer.
  • This dyestu if is bleached'out in proportion to the silver of theireversalimagein the'receiving layer and in this way-a colorimage' is produced.
  • the reversal image may also bef'ormed by-color development. ing the exposed material in a usual developer, allowing the not-reduced :silvertodifiuse into and to be reduced in the receiving layer, re-
  • the diffusion and the color-image formation can alsobe carriedout" in -a single treatment.
  • the material is -washed-after the first development as usual in order to altogether remove the developer. It is then treated in a color developer containing-a silver salt solvent.
  • not-reduced silver salt diffuses intothe receiving layer formingtherein both a" silver image and a-color imagebythe'actioniof the substances accelerating the'reduction.
  • thel-color-fcouplers may be present in the color cleveloper o'r "m me-receiving layer.
  • the silver salt solvent may be The diffusion of the not-reduced silver halide consequently already takes place after the first development in such a way that a primary negative image is termed in the emulsion layerand at the same time a secondary positive image in the receiving layer.
  • the two silver halide "images are re-halogenizedand re-developed in a color developer; now a negative silver image is formed in the-emulsion layer anda color image simultaneously with a positive silver image in the receiving layer.
  • a material :theoretically should consist ofat. least two,. preferably three emulsion layers and also .of their respective receiving :layers. Since one of the emulsion layers necessarily is in contact with two receiving layers, the not-reduced silver salts of this emulsioncan diffuse into two, diiferent receiving layers i. e. two different colored positive images maycorrespond to one part-image which results in an incorrect colour rendering.
  • - 'A 'photographic' multi-layer which allows obtaining multi-color images according to thediffusion principle in a simple and positive way, contains the usual sensitive layers, correspondingreceiving layers and at least onebarrier layerwhich forms the separation betweena sensitivelayerand an adjacent receiving layer.
  • barrier layers are characterized thereby that they contain substances which check the diffusion of the silver salts either by catalytic action or by chemical reaction.
  • Such substances are developmentnuclei, such as colloidal silver, silver sulphide, fogged silver halide emulsion and others, as described in Patent 2,352,014.
  • the difi'used salt probably will be decomposed, by the catalytic action of the development nuclei, to metallic silver which is precipitated in the barrier layer and subsequently is removed simultaneously with the silver image.
  • the barrier action may be obtained also by using substances which precipitate the dinusing complex silver salts, such as for instance the known photographic stabilizers having a reactive hydrogen atom in an ammoor a mercapto group.
  • the thickness of a barrier layer required depends upon diiferent factors such as e. g. the nature and the concentration of the development nuclei and precipitating substances, the concentration of complex silver salts, the nature of the developers used whilst reducing the diffusing silver salt etc.
  • the barrier layer is arranged between an emulsion layer and a receiving layer.
  • a receiving layer e. g. may be functioning as barrier layer which is of primary importance for a material wherein the two receiving layers of two succeeding sensitive layers are coated in superposition in between the said sensitive layers.
  • the barrier action of the receiving layers may be increased by correspondingly varying the thickness of the layers or by a greater concentration or development nuclei and precipitating substances.
  • it may be useiul to arrange an extremely thin barrier layer between the two receiving layers.
  • Photographic material according to this invention is simple and can be carried out by any person slightly skilled in the art of photography. For instance, when color development is used, the three primary part images are developed in a usual photographic developer. Next the remaining developer is completely removed by thorough washing. The material is further treated in a color developer containing a solvent for silver salts as fully described in Patent Number 2,352,014.
  • the remaining silver salts diffuse from every emulsion layer into the corresponding receiving layer and are reduced upon the development nuclei; simultaneously the oxidization products of the developing agent are coupled with the diffusion-fast color coupler, which is contained in every receiving layer. In this way, dyestufis are obtained which correspond to the optical sensitization of each sensitive emulsion layer. After removing the metallic silver, the color image appears.
  • the invention is not limited to the use of the silver bleaching-out method nor to the process of the color development. All other processes, however, applied in color photographic technics may be used separately as well as simultaneously and at will.
  • a three-layer material may be used wherein the receiving layer of the blue-sensitive layer contains a yellow dyestuff, which afterwards is destroyed according to the silver bleaching-out process, whilst both the other receiving layers contain diffusion-fast color couplers which by color development produce a color image.
  • the color images obtained by color development are distinguished by a particular purity of colors.
  • the reduction of the diffusing silver salt forms metallic silver in an extraordinarily finelydivided state, so that the dyestufi obtained produces a favourable absorption curve.
  • the new material can be used for the production of either negative images or positive images, transparent images as well as of images to be viewed by reflected light.
  • the different diffusion-fast dyestuffs or color couplers are separated from the sensitive emulsion so that any undesired influence of these substances upon the photographic emulsion is prevented.
  • Example 1 A material is used according to Fig. 1, wherein the following layers are arranged on the support:
  • Example 2 A material according to Fig. 2 containing the following layers upon the support is used:
  • This material after exposure, is developed in the first bath of Example 1, washed and colordeveloped in bath 2 until the color images formed in the grains are of suificient intensity.
  • Example 3 The material is the one described in Example The diffusion is not induced while developing in bath 2, but during the first development by adding 2 g./liter of sodium thiosulphate to the bath 1. Whilst developing in this developer the negative silver images are formed in the layers and positive silver images in the grains. After fixing and washing, the silver of the image is re-ha-logenized in the following bath:
  • Example 4 A material is used according to Fig. 3 containing the following layers upon the support:
  • Negative silver images are formed in the emulsion layers and positive images in the layers 1, 4 and 1. After fixing and washing, the material is treated in a bleaching bath whereby the azodyestuffs in the layers I, 4 and l are bleachedout according to the silver bleaching-out process. The silver is then rehalogenized and removed by fixation.
  • a photographic material comprising in superposition:
  • a support 2.
  • a red-sensitive silver halide emulsion layer A barrier layer containing a substance selected from the group consisting of heavy metals, insoluble sulfides of such metals and fogged silver halide emulsions; 5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Optical Filters (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US767586A 1939-11-02 1947-08-08 Photographic material for the manufacture of color images Expired - Lifetime US2673800A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB2923839A GB614155A (en) 1939-11-02 1939-11-02 Improvements in and relating to photographic processes
DE6546309 1941-03-20
DE656131X 1941-08-02
DEG1707D DE903532C (de) 1939-11-02 1941-08-03 Verfahren zur Herstellung, farbiger Bilder mittels Halogensilberverbindungen
DE2673800X 1942-12-03

Publications (1)

Publication Number Publication Date
US2673800A true US2673800A (en) 1954-03-30

Family

ID=32303729

Family Applications (2)

Application Number Title Priority Date Filing Date
US767586A Expired - Lifetime US2673800A (en) 1939-11-02 1947-08-08 Photographic material for the manufacture of color images
US767662A Expired - Lifetime US2665986A (en) 1939-11-02 1947-08-08 Process of producing colored reversal images

Family Applications After (1)

Application Number Title Priority Date Filing Date
US767662A Expired - Lifetime US2665986A (en) 1939-11-02 1947-08-08 Process of producing colored reversal images

Country Status (6)

Country Link
US (2) US2673800A (ko)
BE (5) BE453237A (ko)
DE (2) DE764572C (ko)
FR (5) FR873507A (ko)
GB (3) GB654630A (ko)
NL (2) NL60610C (ko)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047620B (de) * 1956-02-13 1958-12-24 Polaroid Corp Verfahren zur Herstellung von photographischen Farbbildern nach dem Diffusionsuebertragungsumkehrverfahren
US2937086A (en) * 1955-07-26 1960-05-17 Eastman Kodak Co Multilayer reversal color material
US2937945A (en) * 1953-09-16 1960-05-24 Agfa Ag Process and photographic material for the direct production of positive photographicimages
US2944894A (en) * 1955-09-28 1960-07-12 Polaroid Corp Photographic processes utilizing screen members
DE1095115B (de) * 1956-03-07 1960-12-15 Eastman Kodak Co Farbphotographisches Diffusionsuebertragungsverfahren und zugehoeriges photographisches Material
US2968554A (en) * 1954-08-09 1961-01-17 Polaroid Corp Photographic transfer processes for forming multicolor dye images and photographic products for carrying out the same
DE1101954B (de) * 1958-08-22 1961-03-09 Eastman Kodak Co Farbphotographisches Diffusions-uebertragungsverfahren und zugehoeriges photographisches Material
DE1105716B (de) * 1958-08-22 1961-04-27 Eastman Kodak Co Farbphotographisches Diffusionsuebertragungsverfahren
US3227551A (en) * 1959-04-06 1966-01-04 Eastman Kodak Co Photographic color reproduction process and element
US3457074A (en) * 1966-04-22 1969-07-22 Eastman Kodak Co Silver dye bleach element containing ballasted para-quinone as diffusion inhibitor
DE2547720A1 (de) * 1974-10-28 1976-04-29 Ciba Geigy Ag Verfahren zur herstellung maskierter positiver farbbilder nach dem silberfarbbleichverfahren
US4036643A (en) * 1973-06-11 1977-07-19 Gaf Corporation Diffusion transfer color process using lactone or sultone ring containing lipophilic non-diffusing color formers which yield diffusing dyes
US4060417A (en) * 1974-04-30 1977-11-29 Polaroid Corporation Diffusion transfer elements comprising color-providing compounds capable of cleavage upon reaction with silver ions and silver ion barrier layers
EP0003376A1 (en) * 1978-01-27 1979-08-08 Agfa-Gevaert N.V. Photographic material suited for the production of multicolour images by means of diffusion transfer of complexed silver halide
US4188217A (en) * 1975-07-14 1980-02-12 Eastman Kodak Company Catalytic activation of cobalt complex imaging by cobalt sulfide
US4197123A (en) * 1977-07-21 1980-04-08 Ciba-Geigy Ag Process for the production of masked positive color images by the silver dye bleach process
US4310617A (en) * 1979-08-01 1982-01-12 Ciba-Geigy Ag Process for the production of masked positive color images by the silver dye bleach process
US5437968A (en) * 1992-10-20 1995-08-01 Fuji Photo Film Co., Ltd. Silver halide color photographic light-sensitive material

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BE444785A (ko) * 1939-11-02
US2692830A (en) * 1944-11-03 1954-10-26 Polaroid Corp Photographic silver halide transfer process
BE471336A (ko) * 1946-04-13
US2698245A (en) * 1946-04-13 1954-12-28 Polaroid Corp Photographic product and process for making a positive transfer image
NL60845C (ko) * 1946-10-07
US2661293A (en) * 1946-10-08 1953-12-01 Polaroid Corp Process of producing a colored photographic image by means of exhaustion of developer
US2653527A (en) * 1947-02-19 1953-09-29 Polaroid Corp Process for treating photosensitive materials by spreading thereon a layer of processing liquid and apparatus for performing said process
US2647049A (en) * 1947-02-25 1953-07-28 Polaroid Corp Photographic element for color photography and a process of producing multicolor pictures
US2759825A (en) * 1948-02-12 1956-08-21 Polaroid Corp Photographic image transfer process
US2635048A (en) * 1948-07-06 1953-04-14 Polaroid Corp Photographic transfer product and process
US2662822A (en) * 1949-04-21 1953-12-15 Polaroid Corp Photographic transfer processes and compositions for the practice of said processes
CH278309A (de) * 1949-07-04 1951-10-15 Bayer Ag Verfahren zur direkten Herstellung von positiven photographischen Bildern.
BE503489A (ko) * 1950-05-26
US2705676A (en) * 1950-08-01 1955-04-05 Polaroid Corp Method of copying negative photographic images by transfer of silver salt to a receiving layer
US2823122A (en) * 1951-06-30 1958-02-11 Polaroid Corp Photographic silver halide transfer process and the print-receiving products useful in connection therewith
US2774667A (en) * 1951-07-02 1956-12-18 Polaroid Corp Photographic silver halide transfer process
BE514019A (ko) * 1952-01-08
US3032413A (en) * 1952-03-02 1962-05-01 Fraunhofer Hans Von Colour photographic processes and materials
BE538152A (ko) * 1952-05-03
US2725298A (en) * 1952-05-03 1955-11-29 Eastman Kodak Co Transfer process of photographic printing
BE521045A (ko) * 1952-06-28
US2765240A (en) * 1953-01-15 1956-10-02 Polaroid Corp Process for forming print-receiving elements
US2927052A (en) * 1953-03-20 1960-03-01 Us Movidyn Corp Process of producing oligodynamic metal biocides
US2806798A (en) * 1953-07-08 1957-09-17 Du Pont Process for preparing yellow colloidal silver
BE534464A (ko) * 1953-12-29
US2704721A (en) * 1954-04-22 1955-03-22 Polaroid Corp Photographic diffusion transfer reversal processes
US2698237A (en) * 1954-08-16 1954-12-28 Polaroid Corp Photographic silver halide transfer product and process
US2992102A (en) * 1955-03-29 1961-07-11 Polaroid Corp Photographic processes and products
NL247505A (ko) * 1957-10-25
BE575893A (ko) * 1958-02-19
US2983606A (en) * 1958-07-14 1961-05-09 Polaroid Corp Processes and products for forming photographic images in color
BE635811A (ko) * 1961-04-13
US3222171A (en) * 1961-07-21 1965-12-07 Polaroid Corp Reflex copying by diffusion transfer
US3203796A (en) * 1962-04-27 1965-08-31 Gevaert Photo Prod Nv Use of starch ether layers in diffusion transfer processes
BE635574A (ko) * 1962-06-27
US3311473A (en) * 1962-06-28 1967-03-28 Eastman Kodak Co Silver halide diffusion process and products therefor
US3255009A (en) * 1962-07-24 1966-06-07 Polaroid Corp Photographic processes and products
US3415647A (en) * 1965-05-17 1968-12-10 Eastman Kodak Co Photographic silver halide diffusion transfer process
GB1178713A (en) * 1966-02-10 1970-01-21 Lumoprint Zindler Kg Improvements in or relating to Silver Salt Diffusion Transfer Processes
US3837854A (en) * 1972-08-14 1974-09-24 Gaf Corp Photographic color process based on controlled flow of silver ions
US4278756A (en) * 1979-07-06 1981-07-14 Drexler Technology Corporation Reflective data storage medium made by silver diffusion transfer
US4284716A (en) * 1979-07-06 1981-08-18 Drexler Technology Corporation Broadband reflective laser recording and data storage medium with absorptive underlayer
CA1134949A (en) * 1980-06-04 1982-11-02 Jerome Drexler Method for photographic replication of information on an optical date storage medium
US5478703A (en) * 1991-12-18 1995-12-26 Eastman Kodak Company Method and material for photographic processing
GB9126852D0 (en) * 1991-12-18 1992-02-19 Kodak Ltd Method and material for photographic processing

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US916616A (en) * 1906-11-12 1909-03-30 York Schwartz Photographic paper.
GB421727A (en) * 1932-06-23 1934-12-24 Bela Gaspar An improved method of producing photographic dyestuff images
GB503826A (en) * 1936-07-07 1939-04-11 Kodak Ltd Process and materials for colour photography
GB511800A (en) * 1938-02-25 1939-08-24 Kodak Ltd Filter-layers for colour photography
FR873507A (fr) * 1939-11-02 1942-07-10 Gevaert Photo Prod Nv Procédé pour l'obtention d'images au moyen d'halogénure d'argent
US2310227A (en) * 1938-05-17 1943-02-09 Chromogen Inc Material for the production of multicolor photographs
US2350380A (en) * 1940-08-01 1944-06-06 Du Pont Photography
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same

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DE530337C (de) * 1930-06-05 1931-07-27 Schering Kahlbaum Ag Verfahren zur Herstellung direkter Positive unter Verwendung von zwei Schichten
US1939231A (en) * 1931-08-07 1933-12-12 Eastman Kodak Co Photographic reversal process
US1900870A (en) * 1932-04-26 1933-03-07 Eastman Kodak Co Photographic color process
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US916616A (en) * 1906-11-12 1909-03-30 York Schwartz Photographic paper.
GB421727A (en) * 1932-06-23 1934-12-24 Bela Gaspar An improved method of producing photographic dyestuff images
GB503826A (en) * 1936-07-07 1939-04-11 Kodak Ltd Process and materials for colour photography
GB511800A (en) * 1938-02-25 1939-08-24 Kodak Ltd Filter-layers for colour photography
US2310227A (en) * 1938-05-17 1943-02-09 Chromogen Inc Material for the production of multicolor photographs
FR873507A (fr) * 1939-11-02 1942-07-10 Gevaert Photo Prod Nv Procédé pour l'obtention d'images au moyen d'halogénure d'argent
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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937945A (en) * 1953-09-16 1960-05-24 Agfa Ag Process and photographic material for the direct production of positive photographicimages
US2968554A (en) * 1954-08-09 1961-01-17 Polaroid Corp Photographic transfer processes for forming multicolor dye images and photographic products for carrying out the same
US2937086A (en) * 1955-07-26 1960-05-17 Eastman Kodak Co Multilayer reversal color material
US2944894A (en) * 1955-09-28 1960-07-12 Polaroid Corp Photographic processes utilizing screen members
DE1047620B (de) * 1956-02-13 1958-12-24 Polaroid Corp Verfahren zur Herstellung von photographischen Farbbildern nach dem Diffusionsuebertragungsumkehrverfahren
US3345163A (en) * 1956-02-13 1967-10-03 Polaroid Corp Photographic diffusion transfer color processes
DE1095115B (de) * 1956-03-07 1960-12-15 Eastman Kodak Co Farbphotographisches Diffusionsuebertragungsverfahren und zugehoeriges photographisches Material
DE1101954B (de) * 1958-08-22 1961-03-09 Eastman Kodak Co Farbphotographisches Diffusions-uebertragungsverfahren und zugehoeriges photographisches Material
DE1105716B (de) * 1958-08-22 1961-04-27 Eastman Kodak Co Farbphotographisches Diffusionsuebertragungsverfahren
US3227551A (en) * 1959-04-06 1966-01-04 Eastman Kodak Co Photographic color reproduction process and element
US3457074A (en) * 1966-04-22 1969-07-22 Eastman Kodak Co Silver dye bleach element containing ballasted para-quinone as diffusion inhibitor
US4036643A (en) * 1973-06-11 1977-07-19 Gaf Corporation Diffusion transfer color process using lactone or sultone ring containing lipophilic non-diffusing color formers which yield diffusing dyes
US4060417A (en) * 1974-04-30 1977-11-29 Polaroid Corporation Diffusion transfer elements comprising color-providing compounds capable of cleavage upon reaction with silver ions and silver ion barrier layers
DE2547720A1 (de) * 1974-10-28 1976-04-29 Ciba Geigy Ag Verfahren zur herstellung maskierter positiver farbbilder nach dem silberfarbbleichverfahren
US4188217A (en) * 1975-07-14 1980-02-12 Eastman Kodak Company Catalytic activation of cobalt complex imaging by cobalt sulfide
US4197123A (en) * 1977-07-21 1980-04-08 Ciba-Geigy Ag Process for the production of masked positive color images by the silver dye bleach process
EP0003376A1 (en) * 1978-01-27 1979-08-08 Agfa-Gevaert N.V. Photographic material suited for the production of multicolour images by means of diffusion transfer of complexed silver halide
US4269924A (en) * 1978-01-27 1981-05-26 Agfa-Gevaert N.V. Photographic material suited for the production of multicolor images by means of diffusion transfer of complexed silver halide
US4310617A (en) * 1979-08-01 1982-01-12 Ciba-Geigy Ag Process for the production of masked positive color images by the silver dye bleach process
US5437968A (en) * 1992-10-20 1995-08-01 Fuji Photo Film Co., Ltd. Silver halide color photographic light-sensitive material

Also Published As

Publication number Publication date
FR53515E (fr) 1946-03-04
FR53404E (fr) 1946-01-10
BE441852A (ko)
GB656131A (en) 1951-08-15
NL60610C (ko)
DE903532C (de) 1954-02-08
US2665986A (en) 1954-01-12
BE444784A (ko)
BE453209A (ko)
FR53502E (fr) 1946-03-04
FR873507A (fr) 1942-07-10
GB654630A (en) 1951-06-27
DE764572C (de) 1952-03-31
BE453237A (ko)
GB654631A (en) 1951-06-27
NL59365C (ko)
FR53513E (fr) 1946-03-04
BE444785A (ko)

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