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
  • G03C5/38—Fixing; Developing-fixing; Hardening-fixing
• • 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 stabilization composition for use in processing photographic printing papers comprising a water-soluble alumi num salt, a polycarboxylic acid or a salt thereof, and benzoic acid or a salt thereof, is disclosed.
• the present invention relates to a stabilizing bath for color photographic printing papers and more particularly to a stabilizing bath or composition for color photographic printing papers for improving the physical properties of the color photographic papers processed, resulting in excellent and stable images on said printing papers, which can be stored for long periods of time, and also having excellent stability thereof.
• the stabilizing bath of the present invention has the following desirable properties:
• the stabilizing bath has a high buffer function.
• Ordinary processing for photographic printing paper includes a drying step, for example, by means of a ferrotype dryer.
• the hardening bath and the stabilizing bath in the photographic processing give rise to.various difliculties since the color photographic light-sensitive printing papers to be subjected to the ferrotype drying have been processed by a number of processing steps.
• a color photographic printing paper is processed by the process as described in The British Journal of Photog raphy; Sept. 27; 838-840 (1968) and the specification of British Pat. No. 736,881 and the printing paper then is subjected to high temperatures and high speed ferrotype drying, the printing paper sticks to the ferrotype plate.
• the stabilizing bath of the present invention by processing a color photographic printing paper, which has been subjected to color development, stop-fixing, washing, bleaching, washing, hardenerfixing, and washing, in the stabilizing bath of the present invention, the printing paper thus processed can be directly subjected to high temperature, high speed ferrotype drying without the necessity of a pre-drying step. Furthermore, when the stabilizing bath of the present invention is employed, the drying speed in the ferrotype drying step is faster than the time required for ferrotypedrying a printing paper which has been subjected to conventional photographic processing and a pre-heating procedure.
• the printing paper subjected to ferrotype drying after being processed in the stabilizing bath of the present invention is very excellent as compared to a printing paper subjected to ferrotype drying after being processed in conventional processings and pre-heating.
• a color photographic printing paper subjected to the aforesaid conventional photographic processings is subjected directly to a low speed ferrotype drying, the paper is charged statically, whereas a printing paper processed using the stabilizing bath of the present invention is charged statically only minimally.
• Another feature of a color photographic printing paper processed using the stabilizing bath of the present invention is that the physical properties of the printing paper are excellent when the paper is stored under various conditions.
• Processed printing papers are usually stored in a condition in which the printing papers are adhered to theboard of an album or attached to a transparent film cover of the page of an album, or stored in bags or cases.
• the temperature and humidity for storing printing papers varied according to the season and place of storage. In general, on storage, the occurrence of difliculties such as adhesion or sticking of the printing papers is minimized under conditions of low temperature and low humidity, but the manner of storage is considerably restricted in high humidity conditions. For example, when a color photographic printing paper processed according to the process described in the abovementioned British Journal of Photography and the specification of the aforesaid British patent are stored under high humidity conditions, the following undesirable difliculties tend to occur.
• the printing papers become sticky and the printed images are degraded by fingerprints, dust, and the like.
• the stabilizing bath used in the processing of photographic light-sensitive elements has an important relation to the stability of the image and various studies have been made about it.
• the process disclosed in U.S. Pat. No. 2,788,274 may be effective in the prevention of fading of color images, but
• the inventors have found that by incorporating a watersoluble aluminum salt in an aqueous solution containing a bufier, the physical properties of color photographic printing papers processed in the solution can be improved markedly. Also, it has been found that by further adding benzoic acid or a salt thereof to the aqueous solution, generation of molds can be prevented.
• the stabilizing bath of the present invention is an aqueous solution containing a water-soluble aluminum salt, a polycarboxylic acid or a salt thereof, and benzoic acid or a salt thereof.
• Examples of the water-soluble aluminum salt used in the present invention are double salts such as potassium alum or ammonium alum and metal salts such as aluminum sulfate.
• Examples of carboxylic acids are citric acid, oxalic acid, malonic acid, maleic acid, tartaric acid, succinic acid, glutaric acid, adipic acid, lactic acid, crotonic acid, aconic acid, diglycocholic acid, itaconic acid, and citraconic acid.
• As the salt of the polycarboxylic acid there are the alkali metal salts and the ammonium salts thereof.
• the polycarboxylic acid or the salt thereof acts as a buffer in the stabilizing bath of the present invention.
• Optimum Amount amount Compound (g-fL) (E-IU Water-soluble aluminum salt 15-40 20-35 Polycarboxyllc acid or salt thereof 2-10 3-7 Beuzoie acid or salt thereof 0. 1-10 0. 2-1
• the buffer ability of the stabilizing bath can be further increased.
• the amount of the additive is usually from 2 to 10 g./l., preferably from 4 to 6 g./l.
• the stabilizing bath of the present invention can be employed with any of the usual color photographic printing papers but more effectively, it is used with the color photographic printing papers having on a support, such as a baryta-coated paper or a resin-coated paper, the lightsensitive layers containing an acetanilide yellow coupler as described in the specification of British Pat. No. 1,113,- 038, a pyrazolone magenta coupler as described in the specification of British Pat. No. 1,142,553, and a phenolic cyan coupler as described in the specification of US. Pat. No. 2,801,171.
• a support such as a baryta-coated paper or a resin-coated paper
• the lightsensitive layers containing an acetanilide yellow coupler as described in the specification of British Pat. No. 1,113,- 038, a pyrazolone magenta coupler as described in the specification of British Pat. No. 1,142,553, and a phenolic cyan coupler as described in the specification of US.
• the stabilizing bath of the present invention has a sufliciently high buifer activity
• any type of processing method such as tank processing, tray processing, and drum processing, can be employed.
• the stabilizing bath of the invention is suitable for the continuous processing of a large quantity of color photographic printing papers.
• the merits of using the stabilizing bath of the present invention such as the improvement of physical properties of color photographic printing papers processed using the stabilizing bath of this invention, the stability of images obtained, and mold prevention of the stabilizing bath are illustrated by the following examples of this invention although the invention shall not be limited to them.
• the test for the stability of the images was determined according to the method described in Photographic Science and Engineering; 11, 5, 295-305 (1967).
• Example 1 The compositions of the processing solutions used in above processing steps were as follows:
• compositions A to F in which Composition A is conventional and Compositions B-F are stabilizing bath compositions of the present invention for 2 minutes at 30.0 C.
• the ferrotype dryer rotates once over a 3 to 10 minute period, the color print processed by using bath A stuck to the ferrotype plate.
• the period of time required for drying the color prints can be shortened by using the processing baths B to F of the present invention due to the high drying speed of these compositions.
• a ferrotype dryer having a smaller diameter can be used, making the drying system economical.
• Example 2 According to the procedure of Example 1, color photographic printing papers were subjected to color development, stop-fixing, washing, bleaching, washing, hardener- Bath A B C D E F Time:
• Example 3 According to the procedure as used in Example 1, color photographic printing papers were subjected to color development, stop-fixing, washing, bleaching, washing, hardener-fixing, and washing and thereafter processed in each of the stabilizing baths A to F described in Example 1, followed by ferrotype drying. The samples thus dried were placed under a humidity condition of RH for one day. The samples were then superposed so that the emulsion surfaces thereof were brought into contact with each other and then stored for one day applying a load of l kg./12 8.3 cm. to the stacked samples. The samples processed in the conventional stabilizing bath (bath A) stuck to each other and when they were forcibly separated, the emulsion layers of the samples were stripped to expose the support areas or the supports themselves were sometimes torn. 0n the other hand, no such difficulties occurred in the case of processing in the stabilizing bath of the present invention (baths B to F). The experiment described herein correlates with storing the color prints in an album for a long period of time, particularly under high humidity conditions.
• Example 4 According to the procedure as used in Example 1, color photographic printing papers were subjected to color development, stop-fixing, washing, bleaching, washing, hardener-fixing, and washing and thereafter processed in each of the stabilizing baths A to F as described in Example 1, followed by drying. Also, as a control, the same procedure was repeated with the exception that no stabilization process was employed. With these samples, including the control sample, the image stability was measured, the results of which are shown in the following tables.
• Example 5 When the same procedures as used in Example 1 were continued for one Week at C., molds were observed in the conventional stabilizing bath (bath A), whereas no mold was observed in the stabilizing bath of the present invention (baths B to F). Further, only after the stabilizing bath of the present invention was used continuously for one year, was the generation of mold observed.
• a stabilizing bath for a color photographic printing paper consisting essentially of an aqueous composition containing:
• the stabilizing bath for a color photographic printcarboxylic acid is selected from the group consisting of sodium tartarate and sodium citrate.
• a stabilizing process for color photographic print ing paper which comprises processing said printing paper in an aqueous composition consisting essentially of:
• said water-soluble aluminum salt being present in an amount of from 15 to 40 grams per liter, said polycarboxylic acid or salt thereof being present in an amount of from 2 to 10 grams per liter, and said benzoic acid or salt thereof being present in an amount of from 0.1 to 10 grams per liter,
• the pH of said stabilizing bath ranging from 2.7 to 4.5.
• polycarboxylic acid is a member selected from the group consisting of oxalic acid, malonic acid, malic acid, succinic acid, glutaric-acid, adipic acid, lactic acid, crotonic acid, aconic acid, diglycocholic acid, itaconic acid and citraconic 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=12044180

Family Applications (1)

Country Status (4)

Cited By (5)

• 1969
  • 1969-03-19 JP JP44021054A patent/JPS4832369B1/ja active Pending
• 1970
  • 1970-03-19 US US21184A patent/US3666468A/en not_active Expired - Lifetime
  • 1970-03-19 DE DE2013242A patent/DE2013242C3/de not_active Expired
  • 1970-03-19 GB GB03269/70A patent/GB1247633A/en not_active Expired

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