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

• the present invention relates to a method of processing color photographic light sensitive materials and, in particular, to a method for processing color photographic light sensitive materials to prevent the color images thus formed from being faded or discolored by ultraviolet light.
• the remaining materials are attacked by ultraviolet light to leave undesirable color stains in the finished photographic emulsion layers.
• a color photographic light-sensitive material is, after exposure,
• the ultraviolet absorbents used in this invention have water-soluble sulfonic acid groups, absorb ultraviolet light rays having wavelengths between 300 m and 400 mu, transmit the light having wavelengths longer than 400 m and are suitable for achieving the aforesaid objects of the present invention.
• a color photographic light sensitive material may of course be processed. After light-exposure, and color development, in any processing solution having incorporated therein the above-mentioned ultraviolet absorbent during subsequent necessary processings, after development, or it may be processed, after completion of the color photographic processings, in an additional processing solution containing the aforesaid ultraviolet absorbent.
• the ultraviolet absorbent of this invention may be used as an aqueous solution alone or with an inorganic salt.
• the aqueous solution of the both components may be incorporated in a secondary fixing solution after bleaching by a ferricyanide and further when the above-mentioned ultraviolet absorbent is used together with borax, the deviation of the pH of the processing solution containing an aqueous solution of the ultraviolet absorbent alone may be considered.
• a color photographic light sensitive material in particular, a color photographic light sensitive printing paper
• a processing solution containing the aforesaid ultraviolet absorbent in this invention in any step of the subsequent processings or by processing further a color photographic light sensitive material, after finishing the photographic processing, in an additional processing solution containing the ultraviolet absorbent, an extremely fluorescent-whitened color photographic image is obtained, fading and discoloration of the image by ultraviolet light are prevented, and the image has almost no color stains.
• a suitable amount of the ultraviolet absorbent used in this invention is about 05-10 g. per liter of the processing solution in which the ultraviolet absorbent is incorporated, although the amount is not limited to this value.
• EXAMPLE 1 A color photographic light-sensitive printing paper having a silver halide red-sensitive emulsion layer containing a cyan coupler, a silver halide green-sensitive emulsion layer containing a magenta coupler, a silver halide bluesensitive emulsion layer containing a yellow coupler, and other subsidiary layers such as intermediate layers were image-exposed and then subjected to conventional photographic processings, such as, color development, stop-fixing, water-washing, bleach-fixing, water-washing, hardening, and water-washing. Thereafter, the printing paper thus processed was processed in an aqueous solution containing 5 g./liter of each of the above shown ultraviolet absorbents for about one minute.
• the color photographic printing paper thus processed was further exposed to light for twenty hours by using a xenon tester and then the fading percentage, that is, the reduction percentage in each color image density of 1.0 was measured.
• the results are shown in the following table.
• the xenon tester used in the experiment was a light source having a spectral distribution and an intensity very similar to sun light.
• the processing temperature in this example was 24 C.
• EXAMPLE 2 After exposure, a color photographic printing paper, as in Example 1, was subjected to photographic processings, such as, color development, stop-fixing, water-washing, bleaching, and water-washing and was processed for 2 minutes in an aqueous solution having the following composition followed by water-washing:
• an aqueous solution of sodium thiosulfate having incorporated therein the ultraviolet absorbent of this invention was as stable as a sodium thiosulfate solution containing no ultraviolet absorbent of this invention.
• the aqueous solution of sodium thiosulfate containing the ultraviolet absorbent was used as a solution for the secondary fixing of color photographic light sensitive materials to provide a fixing action as well as the fading-prevention and color-stain prevention eifects.
• the processing temperature in this example was 24 C.
• a method of producing color photographic images in a silver halide color material containing a color coupler by exposing the material and color developing the same with a primary aromatic amino developing agent, the improvement which comprises avoiding fading or discoloration due to ultraviolet radiation and the formation of color stains after exposing and color development by contacting the material, after exposure and development, with a processing solution containing at least one ultraviolet absorbent selected from the group consist- SOINB SOaNa SOINB SO
• the absorbent is SOaNa SO Na 3.
• the absorbent is Q Q ⁇ N 5.
• said processing solution further contains an inorganic salt.

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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=11784406

Family Applications (1)

Country Status (3)

Cited By (3)

Families Citing this family (1)

• 1967
  • 1967-02-23 JP JP1167067A patent/JPS4635240B1/ja active Pending
• 1968
  • 1968-02-23 BE BE711225D patent/BE711225A/xx unknown
• 1971
  • 1971-03-16 US US124936A patent/US3705036A/en not_active Expired - Lifetime

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