US2665986A - Process of producing colored reversal images - Google Patents

Process of producing colored reversal images Download PDF

Info

Publication number
US2665986A
US2665986A US767662A US76766247A US2665986A US 2665986 A US2665986 A US 2665986A US 767662 A US767662 A US 767662A US 76766247 A US76766247 A US 76766247A US 2665986 A US2665986 A US 2665986A
Authority
US
United States
Prior art keywords
layer
silver halide
light
developer
silver
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
US767662A
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English (en)
Inventor
Rott Andre
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 US2665986A publication Critical patent/US2665986A/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

  • This invention relates to the production of color images by means of silver halide diifused from an exposed light-sensitive silver halide emulsion layer into a layer, inert to light, which is-in contact with the layer first mentioned.
  • the present invention is an improvement of the process and material described in my patent of the United States, No. 2,352,014, which relates to the production of photographic reversal images by the diffusion of the silver halide not affected by the light in an exposed silver halide layer into a receiving layer which is not sensitive to light, and reducing the diffused silver halide in the receiving layer.
  • the sensitive layer and the receiving layer may be mounted on two separate supports. After exposure, the sensitive layer was pressed upon the reception layer in presence of the substances capable of producing the positive reversal image, either by direct reaction with the diffused silver halide in the reception layer or by induced reaction or by catalytic reaction.
  • both these-layers are preferably coated in superposition upon one and the same support.
  • Substances of the kind referred to in my prior patent mentioned above as fogging agents, which are capable of accelerating the reduction of the silver halide not affected by the light and of forming crystallisation nuclei for silver halide may be admixed to the light-sensitive layer. If they are present ina receiving layer-containing an adequate'dyestuff, also color images can be obtained, this dye-'- stufi being then bleached out in proportion to v the silver of the reversal image in the reception layer,- and in this way, the color image is pro loud.
  • the reversal image may also be formed by color development.
  • a first method consists in developing the exposed material in an ordinary developer, allowing the non-light-affected silver halide to diffuse into the reception layer, then developing the reversal image in an ordinary developer, rehalogenizing the reversal image and finally redeveloping the halide thus formed in a color developer. After removing the two silver images, a colored reversal image is left.
  • both the diffusion and the color image formation may also be carried out in a single treatment.
  • the material is washed after the first usual development in order to remove entirely the developer.
  • it is treated in a color developer containing a silver salt solvent.
  • the not-reduced silver salt diffuses into the receiving layer forming therein both a silver image and a dyestuff image by the action of the substances accelerating the reduction.
  • the color couplers may be present in the color developer or in the receiving layer.
  • the silver salt solvent may be added to the primary developer.
  • the diffusion of the non-reduced silver halide consequently takes place already in the first development phase, and in such a way that an image is formed in the emulsion layer and at the same time a reversal image in the receiving layer.
  • the two silver images are re-halogenized and re-developed in a color developer; now a silver image is formed in the emulsion layer and in the receiving layer a color image as well as a reversal silver image.
  • a light-sensitive multi-layer material may be used comprising more than one light sensitive layer and/or more than one receiving layer.
  • pairs of co-acting layers composed of a light sen sitive layer and a reception layer may be isolated by a barrier layer able to check any unwanted diffusion of silver halide.
  • a suitable barrier layer may be constituted by a reception layer in which the diffusing silver halide is fixed by reduction and is thus prevented from diffusing into an adjacent layer. 'The silver image formed in the barrier layer is removed during the further processing of the material.
  • a preferred embodiment of the invention comprises exposing to light a photographic material containing at least two pairs of coacting layers located on the same side of their support,.each' pair consisting of a light-sensitive silver halide
  • EXAMPLE 1 Manufacture of the photographic material Solution A:
  • Solution B I Y Gelatine 20 per cent i cc 200 Hydroquinone g 1 At a temperature of 35 C. the solutions are mixed, jellified, shredded and washed. The
  • Washed mixture is melted and used in the prep aration of the following solution:
  • This mixture is coated upona filrn, provided already with a subbing layer.
  • the coating is thoroughly dried.
  • a not hardened silver halide emulsion is coated upon this layer.
  • the layer is dried.
  • EXAMPLE 2 Manufacture of the photographic material An emulsion layer and a reception layer are successively coated on a photographic film support as described in Example 1. To the reception layer coating solution are added however 50 cos. of a 15 per cent acetonic solution of di bromo-2A-alpha-naphthol per 100 cos. of coating solution.
  • Production 09 the image The exposure, the development and the washing are effected as in Example 1.
  • a photographic material comprising a silver halide emulsion layer is exposed and together with the above described reception material is placed in a metol hydroquinone developing, solution. After development, the silver halide material and the receiving material ar squeezed together. After three minutes, the two materials. are separated. The reception material is freed from silver by means of farmers reducer and; washed. In this way an orange-red image is left in the receiving material.-
  • the photographic process of producing dyestuff images which comprises exposing to light a photographic material containing a light-sensitive silver halide emulsion layer, and then developing said material while said layer is in contact with a reception layer containing a binder and approximately 0.5 to 1.5 g. per g. of the binder of a substance accelerating reduction and forming nuclei and selected from the class consisting of colloidal silver, sulfides and substances containing a labile sulfur atom, in the presence of a color coupler which couples with the oxidation product of an aromatic amino developer with a developer containing an amino-aromatic developing agent and a thiosulfate silver halid solvent.
  • the photographic process of producing dyestufi images which comprises exposing to light a photographic material containing a light-sensitive silver halide emulsion layer, contacting said layer with a reception layer containing a binder and approximately 0.5 to 1.5 g. per 100 g. of the binder of a substance accelerating reduction and forming nuclei and selected from the class consisting of colloidal silver, sulfide and substances containing a labile sulfur atom, and developing said layer in the presence of a color coupler which couples with the oxidation product of an aromatic amino developer with a developer containing an amino-aromatic developing agent and a thiosulfate silver halide solvent.
  • the photographic process of producing dyestufi images which comprises exposing to light a photographic material containing a light-sensentive silver halide emulsion layer, contacting said layer with a reception layer containing a binder and approximately 0.5 to 1.5 g. per 100 g. of the binder of a substance accelerating reduction and forming nuclei and selected from the class consisting of colloidal silver, sulfides and substances containing a labile sulfur atom and a color coupler which couples with the oxidation product of an aromatic amino developer and developing said layer with a' developer containing an amino-aromatic developing agent and a thiosulfate silver halide solvent.
  • the photographic process of producing dyestufi images which comprises exposing to light a photographic material containing at least two layers arranged in superposition on one and the same side of a support, one layer being a lightsensitive silver halide emulsion layer, the other layer a reception layer containing a binder and approximately 0.5 to 1.5 g. per 100 g. of the binder of a substance accelerating reduction and forming nuclei and selected from the class consisting of colloidal silver, sulfides and substances containing a labile sulfur atom, and developing said material with a developer containing an aminoaromatic developing agent and a thiosulfate silver halide solvent, in the presence of a color coupler which couples with the oxidation product of an aromatic amino developer.

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)
US767662A 1939-11-02 1947-08-08 Process of producing colored reversal images Expired - Lifetime US2665986A (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
US2665986A true US2665986A (en) 1954-01-12

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 Before (1)

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

Country Status (6)

Country Link
US (2) US2673800A (da)
BE (5) BE444784A (da)
DE (2) DE764572C (da)
FR (5) FR873507A (da)
GB (3) GB654630A (da)
NL (2) NL59365C (da)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806798A (en) * 1953-07-08 1957-09-17 Du Pont Process for preparing yellow colloidal silver
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
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
US2969014A (en) * 1958-02-19 1961-01-24 Dick Co Ab Photochemical stencil and method for manufacture
US3837854A (en) * 1972-08-14 1974-09-24 Gaf Corp Photographic color process based on controlled flow of silver ions
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
WO1993012462A1 (en) * 1991-12-18 1993-06-24 Kodak Limited Method and material for photographic processing
US5478703A (en) * 1991-12-18 1995-12-26 Eastman Kodak Company Method and material for photographic processing

Families Citing this family (54)

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BE453237A (da) * 1939-11-02
US2692830A (en) * 1944-11-03 1954-10-26 Polaroid Corp Photographic silver halide transfer process
BE471336A (da) * 1946-04-13
US2698245A (en) * 1946-04-13 1954-12-28 Polaroid Corp Photographic product and process for making a positive transfer image
NL60845C (da) * 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 (da) * 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 (da) * 1952-01-08
US3032413A (en) * 1952-03-02 1962-05-01 Fraunhofer Hans Von Colour photographic processes and materials
US2725298A (en) * 1952-05-03 1955-11-29 Eastman Kodak Co Transfer process of photographic printing
BE538152A (da) * 1952-05-03
BE521045A (da) * 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
BE534464A (da) * 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
US2937086A (en) * 1955-07-26 1960-05-17 Eastman Kodak Co Multilayer reversal color material
NL105918C (da) * 1956-02-13 1900-01-01
FR75676E (da) * 1956-03-07
BE572336A (da) * 1957-10-25
US2983606A (en) * 1958-07-14 1961-05-09 Polaroid Corp Processes and products for forming photographic images in color
DE1105716B (de) * 1958-08-22 1961-04-27 Eastman Kodak Co Farbphotographisches Diffusionsuebertragungsverfahren
DE1101954B (de) * 1958-08-22 1961-03-09 Eastman Kodak Co Farbphotographisches Diffusions-uebertragungsverfahren und zugehoeriges photographisches Material
BE619300A (da) * 1959-04-06
NL263591A (da) * 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
NL280240A (da) * 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
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
CH596580A5 (da) * 1974-10-28 1978-03-15 Ciba Geigy Ag
US4188217A (en) * 1975-07-14 1980-02-12 Eastman Kodak Company Catalytic activation of cobalt complex imaging by cobalt sulfide
CH633641A5 (de) * 1977-07-21 1982-12-15 Ciba Geigy Ag Verfahren zur herstellung maskierter positiver farbbilder nach dem silberfarbbleichverfahren.
DE2961488D1 (en) * 1978-01-27 1982-01-28 Agfa Gevaert Nv Photographic material suited for the production of multicolour images by means of diffusion transfer of complexed silver halide
US4284716A (en) * 1979-07-06 1981-08-18 Drexler Technology Corporation Broadband reflective laser recording and data storage medium with absorptive underlayer
US4278756A (en) * 1979-07-06 1981-07-14 Drexler Technology Corporation Reflective data storage medium made by silver diffusion transfer
DE3066277D1 (en) * 1979-08-01 1984-03-01 Ciba Geigy Ag Process for the production of masked positive colour images by the silver dye bleach process and the photographic silver dye bleach material for use therein
FR2484119B1 (fr) * 1980-06-04 1985-12-06 Drexler Tech Procede de reproduction photographique d'informations de milieux optiques de memorisation de donnees, et milieu ainsi reproduit
JP2855035B2 (ja) * 1992-10-20 1999-02-10 富士写真フイルム株式会社 ハロゲン化銀カラー写真感光材料

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US1228680A (en) * 1913-12-13 1917-06-05 Frank William Kent Photographic printing paper and transfer process.
US1499230A (en) * 1921-07-25 1924-06-24 Lage Ernst August Method of producing photographic plates for indirect tricolor photography
FR716428A (fr) * 1930-06-05 1931-12-21 Schering Kahlbaum Ag Procédé et produits pour l'obtention des positifs directs
US1900870A (en) * 1932-04-26 1933-03-07 Eastman Kodak Co Photographic color process
US1905438A (en) * 1930-02-25 1933-04-25 Eastman Kodak Co Photographic color process
US1939231A (en) * 1931-08-07 1933-12-12 Eastman Kodak Co Photographic reversal process
US2091713A (en) * 1935-02-27 1937-08-31 Eastman Kodak Co Developer
US2179234A (en) * 1935-10-03 1939-11-07 Agfa Ansco Corp Manufacture of multicolor photographs
US2196226A (en) * 1937-01-22 1940-04-09 Veracol Film Syndicate Ltd Chemical treatment of photographic images
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
FR879995A (fr) * 1941-01-24 1943-03-10 Ig Farbenindustrie Ag Procédé pour la constitution d'images photographiques positives
US2328034A (en) * 1940-12-14 1943-08-31 Du Pont Photographic element and process
US2336327A (en) * 1941-11-13 1943-12-07 Eastman Kodak Co Preventing color stain in photographic emulsions
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
US2363764A (en) * 1940-08-01 1944-11-28 Du Pont Color photography
US2369171A (en) * 1940-12-14 1945-02-13 Du Pont Methods of photography
US2371740A (en) * 1942-03-20 1945-03-20 Eastman Kodak Co Developers containing silver halide solvents
US2543181A (en) * 1947-01-15 1951-02-27 Polaroid Corp Photographic product comprising a rupturable container carrying a photographic processing liquid

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FR757376A (fr) * 1932-06-23 1933-12-26 Procédé de production d'images photographiques en couleurs
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

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US1228680A (en) * 1913-12-13 1917-06-05 Frank William Kent Photographic printing paper and transfer process.
US1499230A (en) * 1921-07-25 1924-06-24 Lage Ernst August Method of producing photographic plates for indirect tricolor photography
US1905438A (en) * 1930-02-25 1933-04-25 Eastman Kodak Co Photographic color process
FR716428A (fr) * 1930-06-05 1931-12-21 Schering Kahlbaum Ag Procédé et produits pour l'obtention des positifs directs
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
US2091713A (en) * 1935-02-27 1937-08-31 Eastman Kodak Co Developer
US2179234A (en) * 1935-10-03 1939-11-07 Agfa Ansco Corp Manufacture of multicolor photographs
US2196226A (en) * 1937-01-22 1940-04-09 Veracol Film Syndicate Ltd Chemical treatment of photographic images
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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FR879995A (fr) * 1941-01-24 1943-03-10 Ig Farbenindustrie Ag Procédé pour la constitution d'images photographiques positives
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2336327A (en) * 1941-11-13 1943-12-07 Eastman Kodak Co Preventing color stain in photographic emulsions
US2371740A (en) * 1942-03-20 1945-03-20 Eastman Kodak Co Developers containing silver halide solvents
US2543181A (en) * 1947-01-15 1951-02-27 Polaroid Corp Photographic product comprising a rupturable container carrying a photographic processing liquid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806798A (en) * 1953-07-08 1957-09-17 Du Pont Process for preparing yellow colloidal silver
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
US2944894A (en) * 1955-09-28 1960-07-12 Polaroid Corp Photographic processes utilizing screen members
US2969014A (en) * 1958-02-19 1961-01-24 Dick Co Ab Photochemical stencil and method for manufacture
US3837854A (en) * 1972-08-14 1974-09-24 Gaf Corp Photographic color process based on controlled flow of silver ions
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
WO1993012462A1 (en) * 1991-12-18 1993-06-24 Kodak Limited Method and material for photographic processing
US5478703A (en) * 1991-12-18 1995-12-26 Eastman Kodak Company Method and material for photographic processing

Also Published As

Publication number Publication date
BE444784A (da)
DE903532C (de) 1954-02-08
GB654631A (en) 1951-06-27
GB654630A (en) 1951-06-27
FR53404E (fr) 1946-01-10
DE764572C (de) 1952-03-31
BE453237A (da)
BE453209A (da)
FR873507A (fr) 1942-07-10
BE444785A (da)
FR53502E (fr) 1946-03-04
FR53513E (fr) 1946-03-04
FR53515E (fr) 1946-03-04
NL60610C (da)
GB656131A (en) 1951-08-15
US2673800A (en) 1954-03-30
NL59365C (da)
BE441852A (da)

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