[go: up one dir, main page]

US2304940A - Color photography - Google Patents

Color photography Download PDF

Info

Publication number
US2304940A
US2304940A US314689A US31468940A US2304940A US 2304940 A US2304940 A US 2304940A US 314689 A US314689 A US 314689A US 31468940 A US31468940 A US 31468940A US 2304940 A US2304940 A US 2304940A
Authority
US
United States
Prior art keywords
layer
water
emulsion
photographic
silver halide
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
US314689A
Other languages
English (en)
Inventor
Leopold D Mannes
Jr Leopold Godowsky
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US2304940A publication Critical patent/US2304940A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/835—Macromolecular substances therefor, e.g. mordants
    • 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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • 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
    • G03C7/388—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor
    • G03C7/3882—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor characterised by the use of a specific polymer or latex
    • 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
    • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
    • Y10S516/924—Significant dispersive or manipulative operation or step in making or stabilizing colloid system
    • Y10S516/928—Mixing combined with non-mixing operation or step, successively or simultaneously, e.g. heating, cooling, ph change, ageing, milling

Definitions

  • vtype which is Widely used commercially involves the coupling of a color forming compound with' a primary aromatic amino developing agent to form a colored image.
  • the coupling compounds used in this process are those having a reactive methylene group or a reactive' phenolic group which couples with the oxidation product of the primary aromatic amino developing agent on photographic development. Suggestions have been made for incorporating these coupling compounds either in the developing solution or in the sensitive layer before exposure.
  • the coupling compounds When the coupling compounds are incorporated in the developing solution, it is desirable that they be as soluble ⁇ as possible in the developing solution so that upon photographic development they will penetrate the gelatin or other colloidal material of the sensitive layer and thereby permit the formation of a dye image in any exposed portion of the layer.
  • the coupling compounds when the coupling compounds are to be incorporated in the sensitive layer prior to exposure, they should be insoluble in order that they do not wander out of the layer during coating of a multi-layer material or during photographic development. Methods have been proposed for keeping the coupler, compounds in the photographic layer, most of these involving the use of large molecules of coupler to prevent diffusion.
  • Fischer describes a multi-color process using coupling compounds incorporated in the photographic layers.
  • the coupling compounds known to Fischer could not be kept in the respective layers of a multi-layer material by merely mixing them with the gelatin of the emulsion'. All of the compounds disclosed by Fischer diiuse from the layer and no color separation can be obtained in Fischers process.
  • Our method consists in surrounding or mixing the coloringv material, such as a coupling compound, with a water-insoluble but water permeable cellulosic binder and then dispersing this l material in a colloidal material such as gelatin.
  • a coloringv material such as a coupling compound
  • a water-insoluble but water permeable cellulosic binder and then dispersing this l material in a colloidal material such as gelatin.
  • the coupling compounds with the cellulosie binder can best be suspended in the gelatin or other Water permeable material by means of an organic solvent which is immiscible with water and, therefore, it is possible to use couplers which are extremely insoluble in aqueous alkaline solution and Whose very insolubility in aqueous solutions hitherto made it diilicult to incorporate them in materials such as gelatin.
  • a water-miscible solvent such as alcohol
  • induces crystallization or wandering of the coupler and for this reason it is frequently desirable to use water-immiscible solvents in dissolving the coupler.
  • a photographic element having a plurality of differentially color sensitive photographic emulsions on a single support. at least one such photographic emulsion containing a' coupling compound dispersed in a water-insoluble but water-permeable material.
  • the elemeni-l may have a plurality of layers of diierentially color-sensitive emulsions on a single support, one at least of which layers consists of a dispersion of a water-insoluble but water-permeable binder containing a coupling compound in a gelatine-silver halide emulsion.
  • the photographic element may have an emulsion consisting of silver halide in gelatin, the gelatin having distributed therein finely dispersed particles of water-insoluble. water-permeable binder containing the coupling compound.
  • a plurality of layers may be coated in this way each containing in the water-insoluble, water-permeable. cellulosic binder a coupling compound corresponding in a suitable manner to the sensitivity of the layer.
  • a red sensitive photographic emulsion would be chosen containing a blue-green coupling compound, a green-sensitive emulsion containing a magenta coupling compound and a blue-sensitive emulsion containing a yellow coupling compound.
  • the cellulosic particles themselves may contain the silver halide as well as the coupling compound.
  • particles of cellulosic binder may be prepared each containing the appropriate coupling compound and properly sensitized silver halide grains and these may be separately dispersed in a plain gelatin layer s that a single layer element is obtained in which three differently colored images may be formed.
  • the color sensitizer where one is employed, is included with the silver halide in any case.
  • the water-insoluble, water-permeable cellulosic binder used to surround the particles of coupler may be a cellulose ester, such as cellulose nitrate or cellulose acetate, or a mixed organic ester of cellulose. such as cellulose acetate phthalate. Cellulose ethers may also be used. Collodion solutions, well known in the photographic art. may also be employed.
  • the cellulosic binders a1- though they prevent the diffusion of the coupler into adjacent water soluble layers, that is into the gelatin, are suillciently accessible to the developing and other processing baths to enable the usual methods of color processing to be applied.
  • known coupler compounds may be incorporated in photographic layers and the layers may be processed in the ordinary way.
  • the color processing baths may contain ingredients such as organic solvents or wetting agents to facilitate the penetration into the water soluble binder.
  • Etherls Ethylene glycol monobenzyl ether Diethylene glycol monobutyl ether Diethylene glycol monobutyl ether monoacetate Diethylene glycol monoethyl ether Diethylene glycol diethyl ether Ethylene glycol monophenyl ether.
  • Porosity may be effectively decreased by hardening with chromium salts, particularly where cellulose acetate is used as the water-insoluble, water-permeable binder.
  • Example 1 An emulsion is m-ade by preparing a solution of the following ingredients:
  • Gardinal (fatty alcohol sulfate) g-- 2 1/z Water *n cc-- 1250 'I'he whole mixture is heated on a steam bath at C. with constant stirring to evaporate all of the butyl acetate and some lof the water. At the end of the evaporation process the volume has been reduced to about 300 cc. 'I'his dispersion of cellulose nitrate particles containing the coupler is added to 1000 cc. 'of a red-sensitive gelatino-silver halide emulsion. The resulting emulsion is coated on a suitable support. A yellow lter layer is then coated on the emulsion, consisting of tartrazine in gelatin.
  • 'I'he top layer consists of a green-sensitive silver halide gelatin emulsion to which has been added a cellulose nitrate dispersion made as described in the preceding paragraph, but using as the coupler a mixture yielding an orange-red dye upon development.
  • Suitable .couplers for this purpose are n-propyl-pbenzoyl acetamino benzene sulfonate and 2-cyanoacetylnaphthalenesulfon-N-methyl anilide. These couplers are used in the amount of 5 grams each and producing an orange red dye upon development in a couplingy developer.
  • 'I'his emulsion is coated as the top layer to produce a two-layer sensitive material.
  • the film may contain a yellow dye throughout the emulsions which is removable during processing either by virtue of its solubility or its susceptibility to a chemical action of one of the processing baths.
  • Example 2 A three-layer sensitive film is made as follows: The bottom layer consists of a red-sensitive gelatine-silver. halide emulsion to which has been added a dispersion of cellulose nitrate containing, as a bluegreen coupler, 5phenoxy acetamino-l-naphthol, made as described in Example 1. The middle layer is a green-sensitive gelatino-silver halide emulsion with a cellulose nitrate dispersion containing as a magenta coupler 2cyanoacetylnaphthalene-sulfon-N-methylanilide.
  • the top layer is unsensitized silver halide emulsion containing Y as a yellow coupler w-benzoylacet-o-chloranilide and cellulose nitrate dispersion made as in Example 1.
  • the amount of coupler used in these dispersions may vary over wide limits. It is found necessary to adjust the coupler concentration in each particular case depending upon the dye density to be produced the thickness of the layers and other factors. In general the coupler concentrations may range from about 21/9 grams kto about grams of coupler per liter of emulsion. The cellulose nitrate and other ingredients of the emulsion may also be Variedover a wide range, depending upon properties of the particular combination being used.
  • Example 3 A high speed photographic multi-layer material is made by coating three gelatino-silver halide emulsion sensitive respectively to the red, green and blue regions of the spectrum on a single support, each emulsion containing nely dispersed particles of collodion or another cellulose derivative containing no silver halide but merely the coupling compound required for that layer.
  • the coupling compound (l-naphthol-Z-carboxylic-a-naphthylide) may be used, for the green-sensitive layer the coupling compound 2-cyanoacety1l naphthalene sulfon-N-methyl anilide may be used and for the blue sensitive layer the coupling compound benzoyl acct-2,5-dichloroanilide may be used.
  • 'I'hese couplers produce respectively bluegreen, magenta and yellow images upon photographic development.
  • the processing of this iilm may be carried out either to produce a negative image by immediate immersion in a color-forming developer or it may be developed initially in an ordinary MQ developer or a positive image may be formed by exposing the :film to white light after the ordinary rst development and then developing the residual halide in a color forming developer.
  • the coupling compound remains within the cellulose particle into which, however, the oxidized coupling developer penetrates freely in those localities where it has been oxidized by developing the sensitive silver halide grains. A dye image is thus built up in those cellulose particles most nearly adjacent to the exposed silver halide grains.
  • Example 4 A sensitive photographic layer containing a coupler together with silver halide in a cellulosic binder the whole being dispersed in gelatin was made as follows:
  • cc. of a commercial collodion emulsion were diluted with 20 cc. of N-butyl acetate and this solution was then added to 100 cc. of a 0.1% solution of a higher fatty alcohol sulfate in water.
  • This latter compound which is sold under the trade name Gardinolis a well known dispersing agent.
  • To this solution there was added 0.25 gram of 5-phenoxyacetamino'-l-naphthol and the mixture was then run through a small homogenizer and was recirculated for five minutes. Subsequently it was vacuum distilled to remove solvents employed in the preparation of the collodion emulsion and the butyl acetate which was added as noted above.
  • a collodion silver halide emulsion is made in the usual manner and divided into three parts A, B and C.
  • a and B are added respectively suitable quantities of non-water-soluble red and green sensitizers, for example, pinacyanol or the neothiazolocarbocyanine derived' from. 2,4-dimethyl thiazole ethiodide for the red, and erythrosin for the green.
  • suitable quantities of coupling compounds which, with a developer such as diethyl-p-phenylene-diamine, will yield blue-green, magenta and yellow dye images.
  • Suitable compounds are 5,7-dibromo-8-hydroxyquinoline for blue-green, p-phenylbenzoyl acetonitrile for the magenta and -naphthoyl acetone for the yellow.
  • Sensitizers and couplers are contained in true solution in the organic solvents used for the collodion.
  • aqueous gelatin solution is then prepared and maintained at a pH low enough to prevent dissolving the coupling components.
  • minutedried particles of the three collodionemulsions which have been spray dried or otherwise dispersed. These particles will be about the size of ordinary negative emulsion grains but each will contain a number of exceedingly ne silver halide particles suspended in the collodion and in intimate contact with the sensitizing dye and coupling compound.
  • the gelatin carrier containing them is coated as a single layer ona photographic support.
  • a single developer such as diethyl-p-phenylenediamine this layer forms three differently colored images.
  • Example 6 The following example illustrates the dispersion of an originally colored material in a cellulosic compound, in a gelatino-silver halide emulsion.
  • a solution is prepared containing 20 grams of cellulose nitrate, 10 grams of ethylene glycol monobenzyl ester, 10 grams of benzene azo cresol and 750 cc. of butyl acetate.
  • This solution is emulsifled, for example, by homogenization with 1000 cc. of a 0.2% aqueous solution of a higher fatty alcohol sulfate.
  • the emulsion is heated with stirring to expel the butyl acetate and the remaining iine suspension of dyed cellulose nltrate particles are added to 1000 cc. of a gelatine.
  • coupler compounds are suitable for use in our invention where the photographic layer is designed to be developed with an aromatic amino developing agent.
  • couplers may be used which would not be suitable for incorporating in a. gelatin emulsion without the use of some special means to prevent diffusion.
  • the couplers which we may use have a molecular size and shape such that, although capable of diffusing through gelatin, they are readily rendered non-diiusing by physically combining them with a dispersed cellulosic material.
  • a support I0 of any suitable material such as cellulose nitrate or cellulose acetate, synthetic resin, or paper, is coated with a plain gelatin layer II .and a plain gelatin layer I2 each containing dispersed particles oi' a suitable water permeable but water insoluble cellulosic binder.
  • Emulsion layer I2 contains the cellulosic particles I3 containing coupler A and silver halide.
  • Gelatin layer II contains dispersed particles Il of cellulosic material containing coupler B and silver halide.
  • the silver halide is dispersed in the cellulosic particle and that the coupler is dissolved in it, and that the drawing is not intended to indicate that the silver halide and the coupler occupy concentric portions in the cellulosic particle.
  • the support I0 is coated with gelatino silver halide emulsion layers I5, I6 and I1 sensitive respectively to the red, green and blue regions of the spectrum.
  • Emulsion layer I'I contains cellulosic particles I8 containing coupler A'
  • emulsion layer I6 contains cellulosic particles I9 containing coupler B'
  • emulsion layer I5 has dispersed therein cellulosic particles 20 containing coupler C'.
  • 'I'he blue, green and red sensitive silver halide particles in the respective emulsion layers are represented by numerals 2
  • Fig. 3 shows a support I Il containing a gelatin layer I I containing differentially sensitized particles of cellulosic binder.
  • 2l is a particle of cellulosic binder containing coupler A' and silver halide grains
  • 25 is a particle of cellulosic binder containing coupler B' and silver halide grains sensitized to another region of the spectrum
  • 26 is a particle of cellulosic binder containing couplers C' and silver halidel grains sensitized to a third region of the spectrum.
  • a light-sensitive layer for producing a colored image comprising a gelatino-silver halide emulsion containing ilnely divided particles of a water-insoluble but water-permeable cellulose ester containing a color former in physical mixture therewith, dispersed in the gelatin.
  • a light-sensitive layer for producing a colored image comprising an emulsion of silver halide in a water-soluble, water-permeable colloidal medium, said emulsion containing finely divided particles of a water-insoluble but waterpermeable cellulose ester containing a color former in physical mixture therewith, dispersed in the water-soluble, waterpermeable colloidal medium.
  • a light-sensitive element for producing a colored image comprising a layer of a waterpermeable silver halide-colloidal medium having dispersed therein finely-divided particles of a water-insoluble but water-permeable cellulose ester containing a color-former in physical mixture therewith.
  • the method of producing a color-forming photographic layer which comprises mixing a water-insoluble but water permeable cellulose compound in an organic solvent with a colorforming compound capable oi reacting with a primary aromatic amino developing agent on :giotcgraphic development, dispersing the mixture of cellulose compound and color-forming compound in a gelatino-silver halideemulsion, and coating said dispersion on a support.
  • the method of producing a color-forming photographic layer which comprises mixing a water-insoluble but water permeable cellulose nitrate with a color-formingl compound capable of reacting with a primary aromatic amino.
  • developing agent on photographic development dispersing the mixture of cellulose nitrate and color-forming compound in a gelatino-silver halide emulsion, and coating said dispersion on a support.
  • the method of producing a color-forming photographic layer which comprises mixing a water-insoluble but water-permeable cellulose acetate with a color-forming compound capable of reacting with a primary aromatic amino developing agent on photographic development, dispersing the mixture of cellulose acetate and color-forming compound in a gelatine-silver halide emulsion, and coating saiddispersion on a support.
  • the method of producing a color-forming photographic layer which' comprises mixing with a water-insoluble but water-permeable cellulose compound a porosity modifier for the material and a color-forming compound capable 'of reacting with a primary aromatic am'ino developing agent on photographic development, dispersing the mixture of cellulose compound and colorforming compound in a gelatino-silver halide emulsion, and coating said dispersion on a support.
  • the method of producing a color-forming photographic layer which comprises mixing with a water-insoluble hut water-permeable cellulose nitrate a porosity modier for the cellulose nitrate and a color-forming compound capable of reacting with' a primary aromatic amino developing agent on photographic development, dispersing the mixture of cellulose nitrate and colorforming compound in a. gelatino-silver halide emulsion, and coating said dispersion on a .sup- DOrt.
  • the method of producing a color-forming photographic layer which comprises mixing with a water-insoluble but water-permeable cellulose acetate a porosity modifier for the cellulose acetate and a color-forming compound capable of reacting with a primary aromatic amino developing agent on photographic development, dispersing the mixture of cellulose acetate'and colortorming compound in a. gelatino-silvei' halide graphic development, and a porosity modier for the cellulose compound which increases the per-7 meability of the cellulose compound to developing solutions when incorporated in a gelatin emulsion layer, and dispersing the cellulose compound containing the color-forming compound and porosity modifier in a gelatin layer.
  • a sensitive photographic element capable of being developed to form a colored image
  • the steps which comprise dissolving in a water-insoluble but waterpermeable cellulose nitrate a color-forming compound capable of reacting with a primary aromatic amino developing agent on photographic development, and a porosity modier for the cellulose nitrate which increases the permeability of the cellulose nitrate to developing solutions when incorporated in a gelatin emulsion layer, and dispersing the cellulose nitrate containing the colorforming compound and porosity modifier in a gelatin layer.
  • a photographic element for producing multi-'color photographic images comprising gelatin having dispersed therein a water-insoluble but .water permeable cellulose compound containing in separate particles different color formers in physical mixture therewith and differentlysensitized silver halides.
  • a photographic element for producing multi-color photographic images comprising a gelatin layer having dispersed therein a waterinsoluble but water-permeable cellulose ester containing in separate particles diierent colorformers infphysical mixture therewith and differently-sensitized silver halides.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
US314689A 1939-01-23 1940-01-19 Color photography Expired - Lifetime US2304940A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB236780X 1939-01-23
GB281239X 1939-12-28
GB291239X 1939-12-29
GB190140X 1940-01-19
GB230240X 1940-02-23

Publications (1)

Publication Number Publication Date
US2304940A true US2304940A (en) 1942-12-15

Family

ID=27516200

Family Applications (4)

Application Number Title Priority Date Filing Date
US314689A Expired - Lifetime US2304940A (en) 1939-01-23 1940-01-19 Color photography
US363012A Expired - Lifetime US2318788A (en) 1939-01-23 1940-10-26 Incorporation of couplers in nongelatin emulsions
US371776A Expired - Lifetime US2311020A (en) 1939-01-23 1940-12-26 Method of dispersing coloring materials in water swellable colloids
US371650A Expired - Lifetime US2279406A (en) 1939-01-23 1940-12-26 Color process using cellulose ester emulsions

Family Applications After (3)

Application Number Title Priority Date Filing Date
US363012A Expired - Lifetime US2318788A (en) 1939-01-23 1940-10-26 Incorporation of couplers in nongelatin emulsions
US371776A Expired - Lifetime US2311020A (en) 1939-01-23 1940-12-26 Method of dispersing coloring materials in water swellable colloids
US371650A Expired - Lifetime US2279406A (en) 1939-01-23 1940-12-26 Color process using cellulose ester emulsions

Country Status (6)

Country Link
US (4) US2304940A (fr)
BE (1) BE440854A (fr)
CH (1) CH236780A (fr)
FR (3) FR51566E (fr)
GB (2) GB540368A (fr)
NL (2) NL65241C (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428208A (en) * 1945-06-20 1947-09-30 Eastman Kodak Co Dichromate bleach bath containing a wetting agent and method of bleaching therewith
US2454043A (en) * 1944-04-04 1948-11-16 Ilford Ltd Gelatino-silver halide photographic elements containing higher fatty alcohols
US2478400A (en) * 1945-08-17 1949-08-09 Eastman Kodak Co Silver halide photographic emulsion with developer and color coupler dispersed therein
US2527261A (en) * 1944-10-30 1950-10-24 Ilflord Ltd Production of photographic silver halide emulsions from gelatinanion soap complexes
US2527262A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-anion soap complexes and their preparation
US2527267A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-sulfonic acid complexes, and their preparation
US2527268A (en) * 1944-10-30 1950-10-24 Ilford Ltd Production of photographic emulsions
US2528496A (en) * 1946-04-30 1950-11-07 Chalkley Lyman Photosensitive leucocyanide composition
US2534654A (en) * 1946-01-11 1950-12-19 Polaroid Corp Ultraviolet absorbing filter
US2571725A (en) * 1946-08-15 1951-10-16 Eastman Kodak Co Eliminating stain in photographic color material
US2576850A (en) * 1945-04-26 1951-11-27 Du Pont Gelling of polymeric compounds
US2577127A (en) * 1946-11-23 1951-12-04 Du Pont Photographic element with colloid layer containing color former and nonionic wettingagent
US2640776A (en) * 1947-08-29 1953-06-02 Eastman Kodak Co Sensitized photographic emulsion containing color couplers
US2772163A (en) * 1953-04-17 1956-11-27 Eastman Kodak Co Photographic emulsions containing couplers and hydrosols
US2870012A (en) * 1955-12-23 1959-01-20 Eastman Kodak Co Microdispersions of photographic color couplers
DE1075431B (de) * 1957-09-04 1960-02-11 General Aniline &. Film Corporation, New York, N. Y. (V. St. A.) Photographisches, insbesondere farbenphotographisches Aufnahme- und Kopiermaterial
DE1081313B (de) * 1957-11-01 1960-05-05 Gen Aniline & Film Corp Verfahren zur Herstellung eines photographischen Einschichtmaterials fuer die Farbentwicklung nach dem Mischkornprinzip
US3000740A (en) * 1955-10-01 1961-09-19 Gevaert Photo Prod Nv Photographic material
US3033680A (en) * 1958-01-13 1962-05-08 Eastman Kodak Co Plasticized gelating compositions
US3121011A (en) * 1959-05-25 1964-02-11 Polaroid Corp Photographic products and processes
US4254216A (en) * 1977-09-12 1981-03-03 Konishiroku Photo Industry Co., Ltd. Color photographic material
US4358533A (en) * 1980-03-11 1982-11-09 Konishiroku Photo Industry Co., Ltd. Silver halide photographic material
EP0200502A2 (fr) 1985-04-30 1986-11-05 Konica Corporation Matériau photographique couleur à l'halogénure d'argent sensible à la lumière
EP0204530A2 (fr) 1985-05-31 1986-12-10 Konica Corporation Procédé de formation d'une image directement positive en couleur
EP0228914A2 (fr) 1985-12-28 1987-07-15 Konica Corporation Procédé de traitement d'un matériau photographique couleur à l'halogénure d'argent sensible à la lumière
US5700608A (en) * 1995-07-31 1997-12-23 Eastman Kodak Company Process for making photographic emulsions and photographic elements and emulsions containing latent image forming units internally containing sensitizing dye

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415382A (en) * 1944-03-31 1947-02-04 Du Pont Photographic elements including hydrophilic color formers
US2565418A (en) * 1947-08-13 1951-08-21 Eastman Kodak Co Method of preparing photographic silver halide emulsions
BE543744A (fr) * 1954-12-20
US2843489A (en) * 1955-07-29 1958-07-15 Eastman Kodak Co Mixed packet photographic emulsions with polyvinyl resin continuous phase
JPS55129136A (en) * 1979-03-27 1980-10-06 Fuji Photo Film Co Ltd Emulsifying method
IT1197427B (it) * 1982-05-14 1988-11-30 Gian Franco Menicucci Metodo di formulazione di leghe metalliche ad uso odontoiatrico e complesso di leghe cosi' ottenute

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454043A (en) * 1944-04-04 1948-11-16 Ilford Ltd Gelatino-silver halide photographic elements containing higher fatty alcohols
US2527261A (en) * 1944-10-30 1950-10-24 Ilflord Ltd Production of photographic silver halide emulsions from gelatinanion soap complexes
US2527262A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-anion soap complexes and their preparation
US2527267A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-sulfonic acid complexes, and their preparation
US2527268A (en) * 1944-10-30 1950-10-24 Ilford Ltd Production of photographic emulsions
US2576850A (en) * 1945-04-26 1951-11-27 Du Pont Gelling of polymeric compounds
US2428208A (en) * 1945-06-20 1947-09-30 Eastman Kodak Co Dichromate bleach bath containing a wetting agent and method of bleaching therewith
US2478400A (en) * 1945-08-17 1949-08-09 Eastman Kodak Co Silver halide photographic emulsion with developer and color coupler dispersed therein
US2534654A (en) * 1946-01-11 1950-12-19 Polaroid Corp Ultraviolet absorbing filter
US2528496A (en) * 1946-04-30 1950-11-07 Chalkley Lyman Photosensitive leucocyanide composition
US2571725A (en) * 1946-08-15 1951-10-16 Eastman Kodak Co Eliminating stain in photographic color material
US2577127A (en) * 1946-11-23 1951-12-04 Du Pont Photographic element with colloid layer containing color former and nonionic wettingagent
US2640776A (en) * 1947-08-29 1953-06-02 Eastman Kodak Co Sensitized photographic emulsion containing color couplers
US2772163A (en) * 1953-04-17 1956-11-27 Eastman Kodak Co Photographic emulsions containing couplers and hydrosols
US3000740A (en) * 1955-10-01 1961-09-19 Gevaert Photo Prod Nv Photographic material
US2870012A (en) * 1955-12-23 1959-01-20 Eastman Kodak Co Microdispersions of photographic color couplers
DE1075431B (de) * 1957-09-04 1960-02-11 General Aniline &. Film Corporation, New York, N. Y. (V. St. A.) Photographisches, insbesondere farbenphotographisches Aufnahme- und Kopiermaterial
DE1081313B (de) * 1957-11-01 1960-05-05 Gen Aniline & Film Corp Verfahren zur Herstellung eines photographischen Einschichtmaterials fuer die Farbentwicklung nach dem Mischkornprinzip
US3033680A (en) * 1958-01-13 1962-05-08 Eastman Kodak Co Plasticized gelating compositions
US3121011A (en) * 1959-05-25 1964-02-11 Polaroid Corp Photographic products and processes
US4254216A (en) * 1977-09-12 1981-03-03 Konishiroku Photo Industry Co., Ltd. Color photographic material
US4314011A (en) * 1977-09-12 1982-02-02 Konishiroku Photo Industry Co., Ltd. Color photographic material
US4358533A (en) * 1980-03-11 1982-11-09 Konishiroku Photo Industry Co., Ltd. Silver halide photographic material
EP0200502A2 (fr) 1985-04-30 1986-11-05 Konica Corporation Matériau photographique couleur à l'halogénure d'argent sensible à la lumière
EP0204530A2 (fr) 1985-05-31 1986-12-10 Konica Corporation Procédé de formation d'une image directement positive en couleur
EP0228914A2 (fr) 1985-12-28 1987-07-15 Konica Corporation Procédé de traitement d'un matériau photographique couleur à l'halogénure d'argent sensible à la lumière
US5700608A (en) * 1995-07-31 1997-12-23 Eastman Kodak Company Process for making photographic emulsions and photographic elements and emulsions containing latent image forming units internally containing sensitizing dye

Also Published As

Publication number Publication date
GB540525A (en) 1941-10-20
FR51566E (fr) 1943-02-05
US2318788A (en) 1943-05-11
CH236780A (de) 1945-03-15
FR951528A (fr) 1949-10-27
NL65241C (fr)
NL63641C (fr)
GB540368A (en) 1941-10-15
US2279406A (en) 1942-04-14
BE440854A (fr)
US2311020A (en) 1943-02-16
FR57149E (fr) 1952-12-15

Similar Documents

Publication Publication Date Title
US2304940A (en) Color photography
US2322027A (en) Color photography
US2397452A (en) Photographic element
US2322005A (en) Photographic bleach-out layer
US2403721A (en) Preventing color fog in photographic material
US2304939A (en) Multilayer photographic material containing color formers
US2527583A (en) Merocyanine filter and backing dyes
US3152907A (en) Method for controlling speed and contrast of photographic emulsions
US3497350A (en) Multicolor elements for color photography
JPS6177847A (ja) ハロゲン化銀カラー写真感光材料
US2478400A (en) Silver halide photographic emulsion with developer and color coupler dispersed therein
US1996928A (en) Sensitized photographic element and process of making same
US2742832A (en) Controlling grain and contrast in color photography
US3449123A (en) Color turbidity agent in color photographic materials
US2271230A (en) Sulphonamides of dyes
US2220187A (en) Filter layer for photographic color films and plates
US2168182A (en) Photographic material for color photography
US2186719A (en) Photographic silver halide emulsions
JPH0218554A (ja) ハロゲン化銀写真感光材料
US2544640A (en) Mixed grain photographic emulsions
US2238495A (en) Method of color photography
GB804662A (en) Improvements in sensitive materials for colour photography
US2210146A (en) Color photography
US3000740A (en) Photographic material
DE69123436T2 (de) Purpurrote Farbstoffe liefernde Kuppler für photographische Materialien