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
  • G03C5/261—Non-bath processes, e.g. using pastes, webs, viscous compositions

Definitions

• the conventional processing of color-photographic materials comprises, development, bleaching and fixing. It is necessary to rinse the material very thoroughly after color-forming development and before the treatment with the bleaching bath in order to remove substantially all the excess developer. This is necessary, because the surplus developer would itself be oxidized in the bleaching bath and react in the oxidized form with color-couplers to yield an undesirable color fog. Times of l520 minutes are necessary for this rinsing, so that this step takes up a large part of the processing time.
• the liquid processing baths for bleaching can be replaced by viscous pastes, which contain the necessary processing agents.
• This paste is applied by conventional devices as a layer on the exposed photographic material. After this treatment, this layer is sprayed off with water.
• viscous pastes the long rinsing of the developed material could not be avoided. Up until now the use of such pastes has consequently been restricted to the processing of black-and-white materials and to the developing step when processing color photographic films.
• the processing method according to the invention makes it possible to shorten successfully the wet processing time for color-photographic negative material by about 50 percent. Similarly the time needed for the wet processing of colorphotographic positive and reversal materials can also be considerably shortened.
• the conventional arrangements can be used for the application of the processing layers.
• the layer thicknesses of the pastes containing the fixing agent and the bleaching agent are preferably between 0.1 and 1 mm., advantageously between 0.3 and 0.5 mm.
• the most suitable thickness of thelayer depends on the concentration of the active substance in the layer, on the photographic material and on the required processing time. The most favorable conditions can be easily established by simple routine tests.
• the viscosity of the processing pastes at 50 C. is between 300 and 2000 c.p.s., preferably between 1000 and 1300 c.p.s. It has been found desirable that the viscosity of the bleaching paste be somewhat less than that of the fixing paste.
• the processing can be carried out at temperatures between and 70 C., preferably between and 40 C.
• the processing pastes have the usual compositions. They differ substantially from the conventional baths in that they contain thickeners which produce the pasty consistency. Processing baths which can be used are described in the book by H. Berger Agfacolor 1962, or in he work by E. MUtter Farbphotographie, Why und Kir, Springer Verlag, Vienna 1967. Suitable thickeners for such baths are: cellulose,
• cellulose such as cellulose ethers, for instance hydroxyethyl cellulose or carboxymethyl cellulose; starch or derivatives thereof; alginates or derivatives thereof, such as salts, carrhagenates, synthetic thickeners such as polyvinyl pyrrolidone, polyvinyl alcohol or other water-soluble polymers, for example, the semiarnide of the copolymer of methyl vinyl ether and ammonium maleate.
• cellulose ethers for instance hydroxyethyl cellulose or carboxymethyl cellulose
• starch or derivatives thereof alginates or derivatives thereof, such as salts, carrhagenates
• synthetic thickeners such as polyvinyl pyrrolidone, polyvinyl alcohol or other water-soluble polymers, for example, the semiarnide of the copolymer of methyl vinyl ether and ammonium maleate.
• EXAMPLE A convention commercial color-photographic material comprising a red-sensitive layer containing a cyan coupler arranged on a support, a green-sensitive layer containing a magenta coupler and a blue-sensitive layer containing a yellow coupler is exposed and developed with a developer having the following conposition:
• the layer thickness is 0.6 mm.
• both layers are rinsed off using a flat jet nozzle and the film is then rinsed in water.

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

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Cited By (4)

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Citations (3)

• 1967
  • 1967-10-14 DE DE19671597489 patent/DE1597489A1/de active Pending
• 1968
  • 1968-10-01 US US764305A patent/US3607277A/en not_active Expired - Lifetime
  • 1968-10-08 CH CH1503168A patent/CH499132A/de not_active IP Right Cessation
  • 1968-10-10 GB GB48022/68A patent/GB1195496A/en not_active Expired
  • 1968-10-11 BE BE722150D patent/BE722150A/xx unknown
  • 1968-10-14 FR FR1589302D patent/FR1589302A/fr not_active Expired

Patent Citations (3)

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