US1695045A - Color photography and the like - Google Patents

Color photography and the like Download PDF

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Publication number
US1695045A
US1695045A US623020A US62302023A US1695045A US 1695045 A US1695045 A US 1695045A US 623020 A US623020 A US 623020A US 62302023 A US62302023 A US 62302023A US 1695045 A US1695045 A US 1695045A
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Prior art keywords
silver
dyes
image
dye
color
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US623020A
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English (en)
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Hamburger Aron
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/48—Mordanting
    • 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
    • G03C7/20—Subtractive colour processes using differently sensitised films, each coated on its own base, e.g. bipacks, tripacks

Definitions

  • This invention relates to the production by photographic methods of pictures in color by dye toning, whether for direct observation or projection.
  • the invention is applicable in connection with color cinematography and for the pro duction of color transparencies, color prints on a paper or other nontransparent base. It will herein be described mainly in connection with the production of color cinematograph films for projection in the usual projector. At present the processes for producing cinematograph films in colors are very complex or the results are not entirely pleasing. As a means towards reducing the complexity of the problem two color processes of cinematography have beenprovided in recent years but in these the color rendering is by no means akin to the colors of the originals from which the pictures have been made.
  • the object of the present invention is to provide an improved process which may be carried into efiect in a very simple manner and give pictures pleasing in character with a wide range of colors and readily producible on an industrial basis free of the disadvantages referred to above.
  • the invention in brief consists in applying to an emulsion containing a silver positive image a combination of dyes of different colors so chosen that on subsequent treatment of the film they will be retained in the film in accordance with the gradations of light and shade and yield colors due to the dye components substantially individually and to a certain extent in addition owing to the blending of the colors of the components.
  • Figure 1 illustrates one form of the present invention in which a supporting film is coated on two sides;
  • Figure 2 illustrates a modification in which a film in coated on one side only and indicates suitable dyestuffs applied thereto;
  • Figure 3 shows two supporting films, each coated with emulsion applied thereto, the two supports being superposed and registered.
  • one method I employ two films (a) and (b),one, the (a) film, sensitized principally to green and blue-violet colors by erythrosine, and the other or (b) film sensitized principally to red, orange and yellow by bathing in a solution of pinacyanol (understood to be 1 1-diethyl-carbocyanine iodide)
  • the film may be exposed without a light filter and the (b) film exposed through a tricolor red or red orange filter.
  • the negatives after developing, fixing, washing and drying in the usual manner are printed onto films to form positives. I prefer to print them onto opposite sides of a film coated on both sides with light-sensitive emulsion.
  • a middle supporting film C is shown coated on one side by a layer A which is intended to indicate the positive silver image representation of the yellow and red components and on the other side with a layer B, being the positive silver image representation of the blue and green components.
  • Short lines D through the layer A are inserted to indicate division of the portion of film shown into a series of images.
  • Next I apply a mixture of two or more dyes to each of the emulsions forming the two images one on each side of the film.
  • a bleaching liquor formed for example of a mixture of equal parts of 1% solutions of pure chromic acid and pure potassium ferricyanide to which l/lOth part of a 2% solution of thiocarbamide may be added. It remains in this bath for a few minutes until the silver has been thoroughly bleached and on removal therefrom is washed until the high lights and non-silver parts of the film are sufficiently clear.
  • the double-coated film ives approximately the effect of a fourcolor process, or more accurately, a five-color process when proceeding on the lines given above because the bleached silver image of itself acts to give a ground work or greyish key varying in intensity according to the lights and shades of the object photographed.
  • the yellow dye should be such that it will on subsequent bleaching of the silver represent ap proximately the amount of pure yellow required to saturate the silver in the image which represents the yellow value of the negative from which it was printed.
  • the dye on the other side which represents the green and blue components of the picture is adjusted in strength to the green and blue values of the negative from which it was printed.
  • the silver or the reduction compound formed in the nascent state in the reducing bath has a greater afiinity for the yellow dye than for the red dye so that there is a definite selection of the one color. namely the yellow, first from the mixture of the two colors, namely the yellow and red, as distinct from any eiiect due to dilution of a mixture. If therefore yellow mixed with'red which would form a light shade of orange. In the deep red parts of the image the small amount of yellow employed is not suflicient to materially affect the color.
  • the double coated film may be dyed as to the appropriate side first yellow and then re-dyed with a suitable red dye, the other side of the film first being dyed, say, green and then re-dyed with a. suitable blue d e.
  • the second dye coatings should be sufficiently concentrated to yield on subsequent bleaching fully dyed silver images which thus become saturated with color, bleaching not being efliected until all.dyeing has been completed; the strength of both dye solutions and the strength of the bleach should be adjusted so that the bleaching and dyeing of the image take place practically simultaneously.
  • FIG. 2 Such a modification is illustrated in Figure 2 in which a central supporting film E is coat, ed on one side with a positive representation of two colors, this being indicated by the reference F, a mixture of suitable dyes being indicated at G so that the representationillustrates the film prior to its introduction into the bleaching solution.
  • the part F is shown divided into a series of images by reference lines H.
  • FIG. 3 shows amodification of this kind, the two supporting films being indicated by the reference letters I and J, respectively, the emulsions on them being the, positive representations of, in one case, yellow to red components and, in the other case, greento blue components, being indicated by the reference letters K and L, respectively.
  • Subdivision into a series of images is shown by the short lines M and N and registration by the dotted lines 0
  • commercial panchromatic emulsions may be employed with the appropriate color filter.
  • any other suitable color sensitizers than those mentioned above may be used.
  • any other suitable bleaching solution may be used.
  • a transparent base having on one side a single film continuous tone positive image corresponding substantially to yellow and red sensations and on the other a single film con tinuous tone positive image corresponding substantially to green and blue-green sensations of the same object.
  • a translucent film having on one side a series of single layer continuous tone positive images suitable for projection, each corresponding substantially to yellow and red sensations and on the other side a series of single layer continuous tone positive images suitable for projection corresponding substantially to green and blue-green sensations.
  • a process for producing photographs in colors which consists in coating a positive silver image with a mixture of basic dyes and submitting the coated emulsion to a chromium reducing solution.
  • a process tor producing photographs in colors which consists in coating an emulsion containing a positive imagein silverwith a mixture of basic dyes and submitting the coated emulsion to a solution containing chromic acid and potassium terricyanide.
  • a process for the production of a colored image which consists in applying an organic dyestuil' to an emulsion containing a photographic silver image and submitting the resultant product to the action of a photographic reducing agent.
  • a process for the production of a colored image which consists in applying an organic dyestuft to an emulsion containing a photographic silver image and submitting the resultant product to the action of a photographic reducing agent formed of potassium i'erri-cyanide and chromic acid.
  • a method of producing color effects which includes the step of applying to a positive silver image av combination of dyes ofv different colors separable during a process of reduction to form translucent dye silver pigments suitable for projection.
  • a method for producing color etl'ccts which consists in applying to a positive silver image a combination of dyes of different colors which will separate during a process of reduction to a dye silver pigment state in proportion to density.
  • a support an emulsion on said support and stable dye salts of silver in said emulsion.
  • a colored photographic image substantially insoluble in water and comprising a complex of silver, chromium and an organic dyestuii' varying in intensity substantially in accordance with gradations of light and shade.
  • a cinematograph film including a series of colored photographic images substantially insoluble in water each comprising a complex of silver, chromium and an organic dyestuii' varying in intensity substantially in accordance with gradations of light and shade.
  • a method of producing color eil'ccts which includes the step of applying to two emulsions on a single support, each emulsion containing a positive silver image, a combination of two separable dyes of different colors to one emulsion and a different combination of two separable dyes of different colors to the other emulsion.
  • a method of producingcolor effects which includes the step of applying to two emulsions on a single support, each emulsion containing a positive silver image. a combination ot' a mixture of red and yellow dyes to one emulsion and a mixture of green and blue dyes to the other emulsion.
  • a method of producing color ciiects which includes the step of applying to two emulsions on a single support, each emulsion containing a positive silver image, a combina tion of a mixture of auramine and rhodamine to one emulsion and a mixture of brilliant green and malachite green containing a small proportion of xylene red to the other emulsion.
  • a process for producing photographs in colors which consists in coating a photographic silver image with a mixture of dyes and subsequently submitting this dye coated silver image to the action of a reducing agent in which the dyes are substantially insoluble.
  • a process for producing photographs in colors which consists in coating a photographic silver image with a mixture of dyes, one of which is brilliant green and submitting this dye coated silver in'iage to the action of a reducing agent in which the dyes are substantially insoluble.
  • a process for producing photographs in colors which consists in coating a photographic silver image with a mixture of dyes of which one is auramine and subsequently submitting this dye coated silver image to the action of a reducing agent in which the dyes are substantially insoluble.
  • a process for the production of a colored image which consists in applying an organic dyestufi to an emulsion containing a photographic silver image and submitting the resultant product to the action of a photographic reducing agent in which the organic 26.
  • Aphotographicrepresentationincolors comprising a support, an emulsion on one side thereof, a photographic image containmg a salt of silver in said emulsion and also containing at least two distinct colors substantially insoluble in water which vary substantially in accordance with the depth of the image for any particular color and are resistant to the action of a solution of potassium meta bisulphite.
  • a colore photographic image comprising a complex including silver and an organic dyestufi substantia 1y insoluble in water and substantially resistant to the action 29.
  • a colored photographic image comprising a complex containing silver and a basic organic dyestufi varying in intensity substantially in accordance with gradations of light and shade and substantially resistant to the action of water and a solution of potassium meta bisulphite.
  • a support an emulsion on said support and stable derivatives of silver and of an organic dyestufi' substantially insoluble in water and substantially resistant to the action of, an aqueous solution of potassium meta bisulphite in said emulsion.
  • a support an emulsion on said support and stable salts of silver and of an organic dyestuff substantially insoluble in water and substantially resistant to the action of an aqueous solution of potassium meta bisulphite, said salts comprisin a complex of silver and of a dyestufi' as aforesaid varying in intensity substantially in accordance with gradations of light and shade.

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  • 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)
US623020A 1922-03-07 1923-03-05 Color photography and the like Expired - Lifetime US1695045A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6722/22A GB203358A (en) 1922-03-07 1922-03-07 Improvements relating to colour photography and the like

Publications (1)

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US1695045A true US1695045A (en) 1928-12-11

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US623020A Expired - Lifetime US1695045A (en) 1922-03-07 1923-03-05 Color photography and the like

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US (1) US1695045A (fr)
DE (1) DE388345C (fr)
FR (1) FR563381A (fr)
GB (1) GB203358A (fr)

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US5722846A (en) * 1990-04-30 1998-03-03 The Boeing Company Bayonet coupling, low impedance, vibration resistant cable clamp

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Publication number Publication date
GB203358A (en) 1923-09-07
FR563381A (fr) 1923-12-04
DE388345C (de) 1924-01-11

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