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
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/50—Reversal development; Contact processes

Definitions

• One of its objects is an improved process of producing multicolor photographs. Another object is a process of producing a multicolor photograph by a single development in color. Another object is a process of producing a multicolor photograph by a single exposure and a single development in color. Further objects will be seen 7 from the detailed specification following hereafter.
• the present invention relates to the treatment of a photographic layer in a simple manner to produce two-color or multicolor pictures without any developing operation in excess'of that for normal black-a'nd-white development.
• Layers suitable for the invention are of the kind which have been described in the co-pending application Ser. No. 90,726 filed July 15, 1936. They are silver halide emulsions, to which has been added, for example, a substance obtainable by the reaction of a compound which by known reactions is capable of forming dyestuffs, for example an amine, a phenol, an aminophenol, a naphthol or an amino-n'aphthol, or a compound having a reactive methylene-group, with a highly polymeric carboxylic acid or a derivative thereof, for instance, the condensation product from U polyvlnyl-maleic-acid-anhydride and p-amino- .phenyl-3-methylpyrazolon having probably the formula:
• maleic-acid-anhydride and m-arninophenol having probably the formula (on-oH-on-on coon ,OONH- So also the silver halide emulsion layers described in the copending application Ser. No. 72,718 filed April 11, 1936, may be used.
• These contain as coupling components for the color development such compounds as are fast to diiiusion in the binding agent used, for instance the gelatin or the like.
• Suitable groups which determine such fastness to diffusion are, for instance, diphenyl, stilbene, azoxy-benzene, hydroxynaphthoic acid amide, diaryl-urea, benzthiazole and certain phenols, aminophenols containing substituents in the 3:5-position and the like.
• Color-forming components in which these groups are introduced are, for example, phenols, anilines, naphthols,
• naphthylamines amino-naphthols; also all substances which have a reactive methylene-group, for example an acetoacetic ester, a cyanoacetic ester, a benzoyl-acetic ester, hydrindene, pyrazolone, cumaranone.
• Further suitable components are for instance a-hydroxynaphthoic-acid-benzi- [m hydroxyphenylaminocarboyll diphenyl or the like.
• these layers have the property that the incorporated color-former is converted into dyestuff by 'a secondary process during the color develop ment and is more strongly held in the light-sensitive layer, which generally comprises gelatin, than has been the case with the bodies hitherto proposed for the purpose; thus they withstand the usual photographic baths. treatment nor inthe subsequent washing with water are they dissolved or washed off. Only under these conditions is it possible to conduct in a single operation a development of all the contributory colors in three superimposed layers.
• this film is exposed in a photographic or cinematographic camera and then developed with 2. normal black and white developer to produce a nega tive.
• a developer which does not react with the coupling components incorporated in the layers, for instance, ,amidol, para-methylaminophenol, or hydroquinone.
• the film without being fixed, .is exposed to the general illumination, whereupon the residual silver halide is developed with a color-forming developer, ,for instance para-dimethylamino-aniline.
• the general illumination and color development following the first black-and-white development may advantageously be combined by merely conducting the color development in bright light.
• the silver present in the layers may be removed by any of the usual solvents for silver. It is also possible to remove already the silver formed in the first developing operation by means of the known silver dissolving agents.
• the process may similarly be conducted for producing copies by copying, optically or in contact, an exposed film made by the process above described, enlargement or diminuation being used if desired, on such a material and developing to a colored positive picture in the manner described.
• a support for instance a Celluloid film
• a support carries on its front face an orthochromatically color-sensitized layer in which incorporated diphenylcarboyl-4.4'-di-(paraamino-1-phenyl-3-methyl-5-pyrazolone) as a red developing component.
• a not specially sensitized layer which contains as the yellow developing component dibenzoylaceticbenzidide-3.3-dicarboxylic acid and at the same time a yellow filter color, for example tartrazine.
• a layer of emulsion which is sensitive to red light and contains as the blue developing component 4.4"-di-1-hydroxy-2- naphthoylamino) -diphenyl. Then this film is exposed and first developed for 10 minutes in an amidol developer (200 cc. of water, 1 gram of amidol, 10 grams of sodium sulfite crystals, 0.2
• a process of producing multicolor photographs which comprises producing a multilayer film having incorporated in the several gelatine silver halide emulsion layers a dye component capable of forming a dye with a developer adapt- -solved form of diffusing components and removing the developed silver from said film.
• a process of producing multicolor photographs which comprises producing a multilayer film having the emulsion layers arranged in superposition 0n the same side of the support and having incorporated in the several gelatine silver halide emulsion layers a dye component capable of forming a dye with a developer adapted for color development said dye components although soluble in aqueous photographic developing solutions being of such molecular constitution that they are incapable in such dissolved form of diffusing in gelatine in any photographic treating bath, exposing said multilayer film to a colored object,-developing the exposed film in a developer not capable of forming a color with said dye components, exposing said multilayer film a second time simultaneously developing all the layers of the exposed film in a developer capable of forming dyes with said dye components and removing the developed silver from said film.
• a process of producing multicolor photographs which comprises producing a multilayer film having incorporated in the several gelatine silver halide emulsion layers a dye component capable of forming a dye with a developer adapted for color development, said dye components although soluble in aqueous photographic developing solutions being of such molecular con-.
• a process of producing multicolor photographs which comprises producing a film having one side coated with an orthochromatically sensitized silver halide emulsion layer containing diphenyl 4.4" (para amino 1 phenyl 3 methyl-5-pyrazolone) and this emulsion layer with a silver halide emulsion layer which has not been specially sensitized and containing dibenzoylacetic-benzidide-3.3-dicarboxylic acid and a.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7193572

Family Applications (1)

Country Status (5)

Cited By (7)

• 0
  • BE BE417705D patent/BE417705A/xx unknown
  • NL NL58558D patent/NL58558C/xx active
• 1936
  • 1936-09-11 US US100319A patent/US2179234A/en not_active Expired - Lifetime
  • 1936-09-30 CH CH201642D patent/CH201642A/de unknown
  • 1936-10-01 FR FR811541D patent/FR811541A/fr not_active Expired

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