US2030904A - Photographic film of the monopack type adapted for color photography - Google Patents

Photographic film of the monopack type adapted for color photography Download PDF

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Publication number
US2030904A
US2030904A US738299A US73829934A US2030904A US 2030904 A US2030904 A US 2030904A US 738299 A US738299 A US 738299A US 73829934 A US73829934 A US 73829934A US 2030904 A US2030904 A US 2030904A
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US
United States
Prior art keywords
color
emulsion
dyes
sensitizing
stratum
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
US738299A
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English (en)
Inventor
Fraunhofer Hans Von
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.)
Omnichrome Corp
Original Assignee
Omnichrome Corp
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 Omnichrome Corp filed Critical Omnichrome Corp
Priority to US738299A priority Critical patent/US2030904A/en
Priority to DEO22165D priority patent/DE682674C/de
Priority to FR800372D priority patent/FR800372A/fr
Priority to BE413196D priority patent/BE413196A/xx
Application granted granted Critical
Publication of US2030904A publication Critical patent/US2030904A/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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/26—Silver halide emulsions for subtractive colour processes

Definitions

  • This invention relates to improvements in photographic films of the mono-pack type adapted for color photography, being particularly directed to sensitized multi-strata films and methods of producing the same.
  • each layer is 3 sensitized for its color value after it has been disposed on its carrier; (1)) an emulsion is sensitized for color and then spread upon the carrier on opposite sides thereof or one on top of the other, or (c) a layer of emulsion on a carrier is 40 subjected successively to sensitizers for warmer V and colder colors or vice versa, with the result that two layers are formed; in the first of the mono-pack methods diificulty is involved in the intermixture in a plurality of layers or the in- 45 complete distribution in respective layers of the color sensit
  • the sentizi ng solution being preferably so constituted as'to provide for red sensitization at the uppermost or emergent'strata, green sensitization for the middle 'or intermediate strata and blue sensitization for the lowermost or entrance strata.
  • the order and arrangeme'nt of strata may be reversed by difference in method of application of the sensitizing solution to the emulsion or by difference in particle size and constitution of the respective dyes in such solution. I Specifically, it is an object of this invention to.
  • layered photographic film a three-layered stratification oi the emulsion of such film, each stratum salt-dye reaction product formed in the stratum as to permit only the .reaction, from the standpoint of subtractive analysis, of the silver saltdye reaction product, with the light of a specific color in each such specific stratum, so that upon treatment of a single layer film with such sensitizing solution, the layen is acted upon -to form three strata, each of which is efiectively sensitized mating the natural coloration according to the demands of three color photography.
  • this invention contemplates the treatment of a monoapack film by incorporating in the emulsion thereof in a single operation, dyes for both color sensitization and in the particular instance, a three-layer strati-- fication of the film emulsion, the silver salt in the respective strata and the strata being sensitized and afiected as to provide acceptance by analysis of the primary color components of light so as to produce upon exposure of the film, images v incorporating the respective primary colors, in the different strata, and their derivatives, substantially reproducing natural coloration with full clarity and depth. It is to be understood that three-layer stratification and color sensitization thereof, as herein practiced, to produce three-color photography, in-
  • sensitizing solution which may, for the purpose of this disclosure, be considered a colloidal suspension in the form of dye particles in different sizes to provide Stratification, and which incorporates in a dispersion medium of alcohol and water color sensitizing and filtering dyes of the following nature and in the following proportion:
  • Pinorthol 1 which comprises essentially of a mixture of Pinachrom and Erythrosin and a slight amount of Rapid Filter Yellow, 1 g. of Rapid Filter Yellow and .4 g. of rose bengal,
  • the first stratum contains a preponderance of the slowly diffusing Pinacyanol particles, a much smaller amount of the relatively larger and faster diffusing Pinachrom, erythrosin, Orthochrom T, and rose bengal particles, and a very small amount of the fine and swiftly diffusing Rapid Filter Yellow particles, andin such layer the silver salt is essentially and for all practical purposes completely sensitized for only the color red and its derivatives.
  • the next adjacent stratum contains a pre-
  • the next adjacent or third stratum contains a preponderance of Rapid Filter Yellow comprising the fastest moving of all particles, and in such layer the silver salt, being normally predominantly sensitive toblue, becomes eflfective only to accept the blue component of light.
  • filter dyes is not considered with relation to the color sensitization of the silver salts in the respective layers and the formation of color images by the reaction product' of the sensitizing dyes in the respective strata with such salts, but their action in the respective strata is directed in the subtractive analysis of light upon exposure of the sensitized film to a control for limiting the passage of blue and green components of light beyond the stratum in which such colors are accepted; as, for example, the blue component of light being accepted in the furthermost stratum, by virture of the presence in such stratum of the silver salt which normally is predominantly sensitive to blue, and which is unaffected by the color sensitizing solution, the Rapid Filter Yellow being minus blue in its characteristics or properties, prevents the passage of blue components into the middle of the green stratum, and'the uppermost or red stratum; rose bengal being minus green in its characteristics or properties limits the passage of green component to the intermediate or green sensitized stratum, and prevents the passage of the greenlight component into the uppermost or red sensitized stratum.
  • sensitizing solution a solution in the nature of a colloidalsuspension, incorporating a dispersion medium carrying dyes of relatively different particle size, some of such dyes being capable of sensitizing silver salts in the emulsion of film by chemical reaction for diiferent color values, and others being adapted, upon dispersion within the film emulsion, to serve as color filter media; the sensitizing solution being so constituted upon application to emulsion as to provide diffusion of the dye particles therein, into the emulsion, to form a plurality of contiguous strata in the emulsion, in each of which the silver salt is acted upon or afi'ected so as to provide, upon exposure of the film, for the formation of images of its predetermined specific primary.
  • a method of treating a mono-pack film comprising diffusing into the emulsion of the film a reagent, incorporating sensitizing dyes and filter dyes of such particle size and rate of diffusion for such time as to produce in the emulsion a plurality of strata predominantly sensitized respectively to record difierent color aspects, each stratum being affected'to exclude substantially the recordation of color aspects other than its own.
  • a method of treating a mono-pack film comprising diffusing into the, emulsion of the film a reagent incorporating sensitizing dyes and filter dyes of such particle size and rate of diffusion for such time as to produce in the emulsion a three-strata formation, each stratum being predominantly sensitized to record different color aspects, each stratum being affected as to exclude substantially the recordation of color aspects other than its own.
  • a method of making a sensitized mono-pack film for use in color photography comprising subjecting the emulsion thereof to the action at one time of a single reagent, incorporating colorsensitizing dyes and filter dyes of such particle size and rate of diffusion for such time as to produce a multi-strata formation in the emulsion the silver salts in each stratum being affected to record predominantly a specific spectral range,
  • a method of making a sensitized mono-pack film for use in color photography comprising subjecting the emusion thereof to the action at one time of a. single solution incorporating color sensitizing dyes and filter dyes of such particle size and rate of difiusion for such time as toproduce a three-strata formation in the emulsion, the silver salts in each stratum being afi'ected to .record predominantlya specific spectral range and to be unaffected substantially as to the other spectral ranges recorded in the other strata.
  • a method of sensitizing a mono-pack film for use in color photography which comprises treating the emulsion of such film with a reagent incorporating color sensitizing dyes of such particle size and rate of diffusion for such time as fected as to exclude substantially the recordation of color aspects other than its own.
  • a method of sensitizing a mono-pack film for use in color photography which comprises treating the emulsion of such film with a reagent incorporating color sensitizing dyes and filter dyes of such particle size and rate of diffusion for such time as to produce in the emulsion a multi-strata formation, each stratum being predominantly sensitized to record different color aspects, the top stratum being affected to record only the 'red aspect, the intermediate stratum being afi'ected to record only the green aspect, and the lower stratum being affected to record only the blue aspect.
  • a method of sensitizing a mono-pack film for use in color photography which comprises treating the emulsion of such film with a reagent incorporating color sensitizing dyes and filter dyes of such particle size and rate of diffusion for such time as to produce in the emulsion a multi-strata formation, each stratum being predominantly sensitized to record different color aspects, the top stratum being affected to record sensitized.
  • a method of making a sensitized monopack film for use in color photographyfcom pris ing a silver halide emulsion upon a support, sub-' jecting the emulsion to a reagent containing color sensitizing dyes and filter dyes, the rate of diffusion of said dyes being controlled bythe particle size thereof, whereby a single treatment for a

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US738299A 1934-08-03 1934-08-03 Photographic film of the monopack type adapted for color photography Expired - Lifetime US2030904A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US738299A US2030904A (en) 1934-08-03 1934-08-03 Photographic film of the monopack type adapted for color photography
DEO22165D DE682674C (de) 1934-08-03 1935-12-24 Verfahren zur Herstellung von photographischen Schichten fuer die Herstellung von Mehrfarbenbildern
FR800372D FR800372A (fr) 1934-08-03 1936-01-04 Pellicule photographique à couches mulitples sensibilisées convenant pour la photographie en couleurs
BE413196D BE413196A (is") 1934-08-03 1936-01-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US738299A US2030904A (en) 1934-08-03 1934-08-03 Photographic film of the monopack type adapted for color photography

Publications (1)

Publication Number Publication Date
US2030904A true US2030904A (en) 1936-02-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US738299A Expired - Lifetime US2030904A (en) 1934-08-03 1934-08-03 Photographic film of the monopack type adapted for color photography

Country Status (4)

Country Link
US (1) US2030904A (is")
BE (1) BE413196A (is")
DE (1) DE682674C (is")
FR (1) FR800372A (is")

Also Published As

Publication number Publication date
DE682674C (de) 1939-10-20
FR800372A (fr) 1936-07-03
BE413196A (is") 1936-02-29

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