Process for the regeneration of photographic bleach-fix baths

Details Process for the regeneration of photographic bleach-fix baths Process for the regeneration of photographic bleach-fix baths

1975-08-21

1977-07-26

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 50A, G03C 526, G03C 532

Patent

active

040380793

ABSTRACT:
Photographic bleach-fix baths containing iron-III-complexes of aminopolyacetic acids as oxidizing agents are rejuvenated by reducing the iron-III-complexes with a reducing agent other the iron and thereafter are desilvered by treatment with iron.

REFERENCES:
patent: 1448475 (1923-03-01), Weisberg
patent: 1624172 (1927-04-01), Levy
patent: 2503104 (1950-04-01), Farber
patent: 3082079 (1963-03-01), Bulloch et al.
patent: 3700450 (1972-10-01), Cooley
patent: 3767401 (1973-10-01), Newman et al.
patent: 3832453 (1974-08-01), Slovonsky et al.

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