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
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/407—Development processes or agents therefor
  • G03C7/413—Developers
  • G03C7/4136—Developers p-Phenylenediamine or derivatives thereof

Definitions

• the present invention relates to color photo raphy and more particularly to a process of color forming development.
• a multilayer film is used, in which the diiferently sensitized silver halide emulsion layers contain diffusion-fast color'formers.
• suitable developers By exposing the film and developing the same with suitable developers, colored photographic pictures are obtained.
• dye-stuffs are formed from the dyestufi components or color formers together with the developed silver, whereas at the places which have not been exposed to light, the colorless diffusion fast dye-stuff components remain unchanged and do not influence the picture.
• a further object of the invention consists in the provision of. color photographic pictures obtained by color-forming development, which are capable of being modified by chemical after-treatment.
• a further object of the invention is the pro- I vision of a color-forming developer containing a developing agent having in its molecule groups capable of being further reacted.
• the excess dye-stuff components remaining in the white parts of the picture can be limited to the already formed picture-dyes in th'e'finished picture, while excluding from the after-treatment reaction the excess dye-stuff components remaining in the white parts of the picture, by employing color-forming substances, containing in their molecule groups, which are capable of being further reacted, for instance quaternary nitrogen atoms. Groups or this kind may easily be reacted with acid dyes or organic, inorganic or complex acids. The developing substances containing such groups must of course be easily soluble. They react only at the exposed places with the color former, so that the reactive group in the finished picture is only present at those places, where the picture dyes are and where they are only desired. 4
• the process of the invention is applicable generally in color forming development and is especially useful in the production of photographic pictures from silver halide emulsion layers containing dye-stuff components fast to diffusion, such as described in the U. S. Patents Nos. 2,178,612, 2,179,238, 2,179,239, 2,179,244, 2,186,849 and the like, assigned to applicants present assignee.
• the invention is examples.
• Example I A multilayer photographic material containing diffusion-fast color formers is developed after exposure with p-aminophenylbutylaminoethyltrimethylammoniumchloride of the formula For correcting the color shade of the picture it can be aftertreated according to the desired change with a yellow, purple, blue-green, or green acid dye-stuff.
• Example 2 A multi-color picture obtained in a multi-layer photographic element by developing with a developer described in Example 1 is after-treated in order to increase the fastness to light thereof with colorless or practically colorless complex acids, such as for instance ,phospho-molybdic blue, red
• Example 3 A multi-color picture obtained in a multi-layer element by developing with a developer of Example 1, which multi-colored picture contains a sound track is after-treated for the purpose of increasing the infra-red absorption of the sound track with an acid having the efiectof increasing the infra-red absorption, for instance the complex metal acids enumerated in Example 2 or with infra-red absorbing dyes.
• a process of developing silver. halide emulsions containing color-formers fast to diffusion comprises developing said emulsions with a developer containing p-arninophenylbutylaminoethyltrimethylammoniumchloride.
• a color-forming developer comprising as a developing agent p-aminophenylbutylaminoethyltrimethylammoniumchloride.
• a process of developing silver halide emulsions containing color formers fast to diifusion which comprises developing said emulsions with a developer containing p-aminophenylbutylaminoethyl-trimethylammonium chloride and treating the dyestufif image thus obtained with an acid compound capable of reacting with said trimethylammonium radical to form a modified dyestuif.
• a process of developing silver halide, emulsions containing c'olor formers fast to difiusion which comprises developing said emulsions with a developer containing p-aminophenylbutylaminoethyl trimethylammoniumchloride and treating the dyestufi' image thus obtained with a compound selected from the group consisting of an acid dye and a complex metal-containing acid.
• a process of developing silver halide emulsions containing color formers fast to diffusion which comprises developing said emulsions with a developer containing p-aminophenylbutyl aminoethyl trimethylammoniumchloride and treating the dyestufi image thus obtained with phospho-molybdic acid.
• a color-forming developer comprising as a developing agent a compound of the following formula:
• R is a phenyl radical
• X is halogen
• R is a phenyl radical
• X is halogen
• the amino groups stand in the 1- and 4-positions of the phenyl radical.
• a process of developing silver halide emulsions containing color formers fast to diffusion which comprises developing exposed picture and sound areas of said emulsions with a developer containing p-amino phenyl-butyl-amino-ethyltrimethyiammoniumchloride and treating the dyestuff image thus obtained in the sound track area with an acid compound capable of reacting with said trimethyl ammonium radical to increase the absorption of the sound track area to infrared.
• WILHELM SCHNEIDER RICHARD SCHAAR SCHMIDT. I GUSTAV VVILMIANNS.

Landscapes

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=7195824

Family Applications (1)

Country Status (4)

Cited By (1)

• 0
  • BE BE437255D patent/BE437255A/xx unknown
• 1939
  • 1939-12-04 CH CH217513D patent/CH217513A/de unknown
  • 1939-12-07 US US307986A patent/US2307161A/en not_active Expired - Lifetime
• 1941
  • 1941-07-09 FR FR873756D patent/FR873756A/fr not_active Expired

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