US2177257A - Colored photographic pictures - Google Patents

Colored photographic pictures Download PDF

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Publication number
US2177257A
US2177257A US197866A US19786638A US2177257A US 2177257 A US2177257 A US 2177257A US 197866 A US197866 A US 197866A US 19786638 A US19786638 A US 19786638A US 2177257 A US2177257 A US 2177257A
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US
United States
Prior art keywords
image
silver halide
picture
silver
pictures
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
US197866A
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English (en)
Inventor
Jakob Lothar
Wendt Bruno
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.)
GAF Chemicals Corp
Original Assignee
Agfa Ansco 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 Agfa Ansco Corp filed Critical Agfa Ansco Corp
Application granted granted Critical
Publication of US2177257A publication Critical patent/US2177257A/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

  • Our present invention relates to the productionof photographic color pictures.
  • Another object is the provision of a process for the production of such pictures which has the advantage that difiusion oi the dyestufi component is greatly reduced, whereby the sharpness of the picture and also, in the case of multi-layer 7 material, the color rendering, is particularly good.
  • the diazotizable dyestufi component of a layer is transformed with the silver halide of the pictureinto a silver compound having a' solubility as low asvthat of the silver halide. l
  • the diazotization and the coupling in the layer then follow, during which the original combination with the silver, and therewith the low solubility of the compound, remains intact.
  • Cyanuric chloride can, for example, be caused to react withdiamines, nitro-amines or nitrophenols, whereby after substituting an SH-group for at least one chlorine atom and if necessary after reduction of theintro-group diazotizable mercapto-compounds, which, after coupling, give colors in all desired shades, are obtained.
  • Such compounds are, for example: Z-para-aminophen;
  • amines can, if desired, be caused to react in the form of their salts in alkaline solutionwith the silver halide of the picture, diazotized after washing and coupled with a component subsequently introduced into, or originally present in, the layer.
  • the silver halide can then be removed by fixing or in any other known manner.
  • Y instead of the amines there may be used their antidiazotates.
  • the invention In comparison with the process disclosed in U. S. Patent 'No. 1,963,197 one obtains by the invention the advantage that an extended range of dyestuffs can be used, since one can now use a number of antidiazotates of which the silver antidiazotates are too easily soluble for the reaction with silver halides.
  • the invention is well suited for the production of multi-color pictures in multi-layer material.
  • a silver bromide picture is bathed for 5 minutes in a solution of 1 per cent. strength of 6-amino-2-mercapto- ⁇ benzthiazole made weakly alkaline by caustic soda and containing 1 per cent. of sodium sulfite, washed with water containing sulfite for 15 minutes, diazotized in an acidified nitrite solution and, after washing out the, nitrite, coupled with a solution of p-naphthol in caustic soda to give a brown-red dyestufi.
  • the picture is diazotized in a solutioncontaining 300 cc. of water, 3 grams of sodium nitrite, 20 cc. of acetic acid of 10 per cent. strength and 2 grams of sodium acetate. After allowing penetration for 3-6 minutes and washing for a short time, the erucayl-K-acid present in the layer is coupled in dilute ammonia to give a purple picture.
  • a silver halide picture in a layer containing an azo-dyestuff 'coupling component fast to 'diffusion for example the pyrazolone produced by condensing a-hydrazino-stearic acid with acetoacetic ester, is treated for 10 minutes with 300 cc. of an aqueous solution of 3 grams oforthoaminophenyl-phenyl-ethinylcarbinol antidiazotate containing 4 cc. of caustic soda lye of per cent. strength.
  • the pyrazolone is converted into the diafionium compoundin a bath containing 1000 cc. of water, 10 grams of citric acid and 10 grams of common salt, coupled to form the dyestuff and fixed in a normal fixing bath.
  • the picture is yellow.
  • a process of producing colored photographic pictures which comprises exposing to light a photographic material provided with at least one emulsion layer containing a light-sensitive silver halide, transforming the latent image into a silver halide image, converting said silver halide image by a compound selected from the group consisting of an amine capable of being diazotized and an antidiazotate thereof, said compound containing a molecular grouping selected from the group consisting of mercapto-group, ethinylgroup and imino-group, the hydrogen atom of said molecular grouping being capable of being exchanged for a metal, into an image of the corresponding organic silver compound and transforming said image into an azo-dyestufi picture.
  • a process of producing colored photographic pictures which comprises exposing to light a' photographic material provided with at least one emulsion layer containing a light-sensitive silver halide, transforming the latent image into a silver halide image, converting said silver halide image by a compound selected from the group consisting of an amine capable of being diazo tized and an antidiazotate thereof, said compound containing a molecular grouping selected from the group consisting of mercapto-group, ethinylgroup and imino-group, the hydrogen atom of said molecular grouping being capable of being exchanged for a metal, into an image of the corresponding organic silver compound, transforming said image into an azo-dyestufi picture and removing the remaining silver halide.
  • a process of producing colored photographic pictures which comprises exposing to light a photographic material provided with at least one emulsion layer containing a light-sensitive silver halide, transforming the latent image into 'a silher halide image, converting said silver halide image by 6-amino-2-mercapto-benzthiazole into an image'of the corresponding organic silver. compound and transforming said image into an azo-dyestuif picture.
  • a process of producing colored photographic pictures which comprises exposing to light a photographic material'provided with at least one emulsion layer containing a light-sensitive silver halide, transforming the latent image into a silver halide image, converting said silver 'halide image by 3-amino-4-methoxyphenyl-methylethinylcarbinol into an image of the corresponding organic silver compound and transforming said image into an azo-dyestufi picture.
  • a process of producing colored photographic pictures which comprises expo ng to light a photographic material provided'with at least one emulsion layer containing a light-sensitive silver halide with the pyrazolone produced by condensing a-hydrazino-stearic acid with acetoacetic ester, transforming the latent image into a silver halide image, converting saidsilver halide image by ortho-aminophenyl-phenyl-ethinylcarbinolantidiazotate into an image of the corresponding 0 organic silver compound and transforming said image into an azo-dyestufi :picture; I LOTHAR JAKOB.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US197866A 1937-04-09 1938-03-24 Colored photographic pictures Expired - Lifetime US2177257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0057661 1937-04-09

Publications (1)

Publication Number Publication Date
US2177257A true US2177257A (en) 1939-10-24

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ID=7194607

Family Applications (1)

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US197866A Expired - Lifetime US2177257A (en) 1937-04-09 1938-03-24 Colored photographic pictures

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US (1) US2177257A (en)van)
BE (1) BE427309A (en)van)
FR (1) FR835971A (en)van)
GB (1) GB513244A (en)van)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671023A (en) * 1949-12-16 1954-03-02 Gen Aniline & Film Corp Preparation of azo dye images in photographic materials
US20170245863A1 (en) * 2013-04-26 2017-08-31 Boston Scientific Scimed, Inc. Devices for obstructing passage of air or other contaminants into a portion of a lung and methods of use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671023A (en) * 1949-12-16 1954-03-02 Gen Aniline & Film Corp Preparation of azo dye images in photographic materials
US20170245863A1 (en) * 2013-04-26 2017-08-31 Boston Scientific Scimed, Inc. Devices for obstructing passage of air or other contaminants into a portion of a lung and methods of use

Also Published As

Publication number Publication date
GB513244A (en) 1939-10-06
FR835971A (fr) 1939-01-06
BE427309A (en)van)

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