Hardening fixer for photographic silver halide material

Details Hardening fixer for photographic silver halide material Hardening fixer for photographic silver halide material

1976-05-27

1977-09-06

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

C03C 538

Patent

active

040465705

ABSTRACT:
A hardening fiber composition for use in the processing of photographic silver halide elements is described which contains a 1-hydroxy-alkylidene diphosphonic acid the alkylidene group of which contains from 2 to 5 C-atoms.

REFERENCES:
patent: 3132943 (1964-05-01), Smith
patent: 3201246 (1965-08-01), Allen
patent: 3214454 (1965-10-01), Blaser et al.
patent: 3488707 (1970-06-01), Willems
patent: 3647449 (1972-03-01), Malloy
patent: 3794591 (1974-02-01), Brown
patent: 3802883 (1974-04-01), Ohkubo et al.
patent: 3839045 (1974-10-01), Brown

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