Processing color photographic materials

Details Processing color photographic materials Processing color photographic materials

1997-11-17

1999-01-12

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

Bleach-fix

430393, G03C 742, G03C 744

Patent

active

058586318

ABSTRACT:
The processing of exposed colour photographic materials by at least the steps of colour developing and bleach-fixing, with electrolytic desilvering of the spent bleach fixative solution, results in better utilisation of the processing chemicals and in a reduced amount of liquid to be disposed of, when bleach-fixing is effected in 2 steps, wherein a pH of .gtoreq.7.4 is set in the 1st step and a pH of .ltoreq.7 is set in the 2nd step, the bleach fixative from the 1st step is electrolytically desilvered and acid for maintaining the pH is fed to the 2nd step.

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patent: 5716766 (1998-02-01), Kurokawa

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