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
  • G03C5/29—Development processes or agents therefor
  • G03C5/31—Regeneration; Replenishers

Definitions

• the invention relates to a process for working up used developers which have been used for the development of photographic materials having at least one silver halide emulsion layer.
• the invention was based on the object of specifying a process for developer workup in which bromide and iodide ions can be largely removed without undesired accumulation of other constituents in the processed developer.
• the anion exchanger contains OH groups as exchangeable groups.
• Strongly basic exchangers are preferably used as anion exchangers, in particular those based on polystyrene, polystyrene / divinylbenzene or polyacrylate.
• the interchangeable groups consist predominantly or entirely of OH groups.
• At least 90% of the exchangeable groups are OH groups.
• adsorbents such as adsorption resins, activated carbon, superficially modified activated carbon and bleaching earth, ensure the regenerability and ability to exchange bromide and iodide ions of the anion exchangers used to remove bromide and iodide ions, if the used color developers only through the adsorbent and then only through the anion exchanger or through a mixture of ion exchanger and adsorbent is tested. It can be seen that the developer substances are retained to different degrees by the various adsorbents.
• Suitable adsorbents are adsorption resins of the phenol formaldehyde, polystyrene / divinylbenzene or polyacrylate resin type with hydroxyl groups, alkylated amino groups or quaternized ammonium groups as functional groups.
• a cation exchanger can be used which removes any heavy metal ions from the solution in the used color developer.
• the developer can be worked up in various ways.
• the developer overflow resulting from the processing of the photographic material by adding refreshing chemicals can be collected and, from top to bottom, first by the anion exchanger and then by the adsorbent, or first by the adsorbent and then by the anion exchanger, or by a mixture of the two, or can only be passed through the anion exchanger.
• the continuous, used developer can then be collected and mixed with the refreshing chemicals, the so-called "rejuvenator” (English: “regenerator”), and used as a regenerator (English: "replenisher”).
• the anion exchanger to be used according to the invention is exhausted. It can then be regenerated, but it is also possible to do without the regeneration and to use fresh anion exchangers in each case.
• the use of fresh ion exchanger has the advantage that fresh ion exchanger is more active than refurbished ion exchanger. Farther the effort, in particular the mechanical effort, for the regeneration of the ion exchanger is eliminated.
• the developer components to be refurbished may also contain the usual developer components, e.g. Anti-oxidants, anti-limescale agents, anti-fogging agents, buffers, competitive couplers etc.
• a commercially available color photographic multilayer material with a carrier made of PE-laminated paper is exposed imagewise and subjected to the following processing:
• the regeneration rate for the developer was 325 ml / m 2 of the recording material.
• the overflow had the composition given in Table 1 in the middle column.
• the pH required for the ready-to-use regenerator is 10.6.
• Example 1 The material specified in Example 1 is processed as indicated there.
• the resulting overflow had the composition specified there. It was cleaned in the same way, with the difference that the ion exchanger used contained Cl ions and not OH groups as exchangeable groups.
• the overflow cleaned in this way had the following composition per liter:

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Treatment Of Liquids With Adsorbents In General (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=6247849

Family Applications (1)

Country Status (4)

Cited By (4)

Families Citing this family (8)

Family Cites Families (9)

• 1984
  • 1984-10-13 DE DE3437631A patent/DE3437631A1/de not_active Withdrawn
• 1985
  • 1985-09-30 US US06/781,763 patent/US4680123A/en not_active Expired - Fee Related
  • 1985-10-03 DE DE8585112490T patent/DE3561217D1/de not_active Expired
  • 1985-10-03 EP EP85112490A patent/EP0178539B1/fr not_active Expired
  • 1985-10-12 JP JP60226025A patent/JPS6195352A/ja active Pending

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