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
  • G03C7/3046—Processing baths not provided for elsewhere, e.g. final or intermediate washings

Definitions

• a waterwashing accelerator for silver halide color photo graphic light-sensitive elements whlch comprises an aqueous solution containing at least one of the following: acetic acid, [30] Foreign Application Priority Data propionic acid, butyric acid, itaconic acid, citraconic acid, aconitic acid, phthalic acid, and derivatives thereof.
• a process Oct. 2, 1967 Japan ..42/63360 for accelerating the removal ofchemicals remaining in aggregater photographic light-sensitive element comprises processing the U-s. [5 [58] Field of Search ..96/56, 55, 60, 61, 62
• the present invention relates generally to color photography, and more particularly to a composition for accelerating water washing of silver halide color photographic light-sensitive elements.
• a single or double weight black and white photographic paper must usually be washed in flowing water for about 1-2 hours to preserve the images obtained for a long period of time.
• silver images are not present, as they are removed by bleaching. It could be assumed that the influence of the remaining thiosulfate is less than in the case of the black and white photographic paper, but it is still necessary in treating color photographic papers to wash them for a considerable period of time.
• a bath of various inorganic salts in particular, an aqueous solution of sodium sulfite, is usually employed in the photographic processing of black and white photographic light-sensitive elements.
• the washing period can be shortened to one-third to one-fourth of the time required when such salts are not used.
• This composition may also be utilized in a novel process for accelerating the removal of chemicals remaining in a color photographic light-sensitive element which has been subjected to photographic processing.
• the novel process basically comprises subjecting the color photographic light-sensitive element to processing in the presence of a member selected from the group consisting of acetic acid, propionic acid, butyric acid, itaconic acid, citraconic acid, aconitic acid, phthalic acid, and derivatives thereof, after the photographic light-sensitive element has been fixed.
• the inventors have investigated water-washing accelerators and have found that certain carboxylic acids and derivatives thereof are effective for accelerating the water-washing of the thiosulfate in photographic light-sensitive elements.
• an object of this invention is to provide a water-washing accelerator composition for color photographic light-sensitive elements which does not have an undesirable influence on the color images.
• the water-soluble carboxylic acids and the derivatives thereof employed in the present invention as the improved water-washing accelerator are acetic acid, propionic acid, butyric acid and the alkali metal salts of the acids; itaconic acid, aconitic acid, citraconic acid, mesaconic acid, and the alkali metal salt anhydrides of these acids or the esters of the acids; and phthalic acid, phthalic anhydride and alkali metal salts of phthalic acid.
• These compounds can be used as a water-washing accelerator for shortening the washing period of time to one-fourth to one-sixth of the washing period of time by conventional water washing, and have no undesirable influence on the color images.
• the water-washing accelerator may, of course, be added to a washing solution or water-washing accelerating bath after fixing and it may be added to other baths between fixing processing and water-washing, such as, a hardening bath or a stabilizing bath.
• the effective amount of the water-washing accelerator is more than 0.01 mole/liter, but best results are obtained in the range of ODS-0.5 mole/liter.
• the pH of the solution for the water-washing acceleration of color photographic elements is preferably 4.59.
• the pH of the water-washing accelerator solution may be adjusted by using sodium hydroxide, acetic acid or sulfuric acid without giving any undesirable influence on color images.
• the water-washing accelerator solution of this invention may contain other additives such as precipitation preventing agents, buffers, ultraviolet absorbers, fluorescent whitening agents, and the like, in amounts which give no undesirable influence on the color images. These are commonly used materials by those skilled in the art.
• Experiment 1 stands for a control using only water; experiments 2 to 10 stand for the examples of the compounds suitable for the purposes of the present invention, and experiments ll to 14 stand for the examples of unsuitable compounds.
• an aqueous solution of 0.2 mole/liter of the additive was used, and the temperature and the pH of the solution were 20 C. and 7, respectively.
• the amount of sodium thiosulfate was less than one-half of that of the control.
• the photographic paper In order to reduce the amount of the remaining sodium thiosulfate in the color photographic paper to less than wig/cm, the photographic paper must be washed in flowing water for more than 30 minutes. Accordingly, it is clear that the water-washing period is reduced to about one-fifth that of the control by employing the compounds of this invention, without giving any substantial undesirable influence on the color images.
• a process for accelerating the water washing of a color photographic light-sensitive element subjected to photographic processings which comprises processing said color photographic light-sensitive element after fixing and before washing in an aqueous solution containing a member selected from the group consisting of itaconic acid, aconitic acid, phthalic acid, phthalic anhydride, and an alkali metal salt of phthalic acid.

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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=13226997

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (1)

Citations (2)

• 1968
  • 1968-09-30 GB GB1230435D patent/GB1230435A/en not_active Expired
  • 1968-10-01 FR FR1583142D patent/FR1583142A/fr not_active Expired
  • 1968-10-01 DE DE19681800377 patent/DE1800377A1/de active Pending
  • 1968-10-01 BE BE721678D patent/BE721678A/xx unknown
  • 1968-10-02 NL NL6814115A patent/NL6814115A/xx unknown
  • 1968-10-02 US US764614A patent/US3649277A/en not_active Expired - Lifetime

Patent Citations (2)

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