Bleaching bath for photographic black-&-white material

Details Bleaching bath for photographic black-&-white material Bleaching bath for photographic black-&-white material

1996-12-17

1998-02-10

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Bleach or intensification

430430, G03C 544

Patent

active

057167672

ABSTRACT:
A bleaching bath for photographic black-&-white silver halide materials characterised by the combination of at least 2 oxidising agents having an oxidising potential of .gtoreq.500 mV, optionally together with a metal salt having a stabilising action of a metal of subgroups 1 or 2 of the periodic system of elements, wherein, in the event that dichromate is used as one of the oxidising agents, it is used in a quantity of at most 3.4 mmol/l.

REFERENCES:
patent: 1389742 (1921-09-01), Crabtree
patent: 1600797 (1926-09-01), Capstaff
patent: 1688540 (1928-10-01), Franko
patent: 2494068 (1950-01-01), Speck
patent: 2843482 (1958-07-01), Kride
patent: 2871110 (1959-01-01), Stead
patent: 2904414 (1959-09-01), Ostrander
patent: 3042520 (1962-07-01), Johnson
patent: 3061433 (1962-10-01), Smith et al.
patent: 3256092 (1966-06-01), Means et al.
patent: 3264107 (1966-08-01), Wartburg
patent: 3342598 (1967-09-01), Bard
patent: 3600166 (1971-08-01), Sieg et al.
patent: 3676219 (1972-07-01), Schroeder et al.
patent: 3707374 (1972-12-01), Voorn et al.
patent: 3785866 (1974-01-01), Frey
patent: 3960565 (1976-06-01), Fisch et al.
patent: 3962108 (1976-06-01), Perruccio
patent: 4032359 (1977-06-01), Fisher et al.
patent: 4045222 (1977-08-01), Shinozaki et al.
patent: 4328306 (1982-05-01), Idota et al.
patent: 4339282 (1982-07-01), Lada et al.
patent: 4608091 (1986-08-01), Sullivan et al.
patent: 4828743 (1989-05-01), Rahfields et al.
patent: 5354383 (1994-10-01), Bianchi
patent: 5393447 (1995-02-01), Carlson et al.
patent: 5441665 (1995-08-01), Massaioli
patent: 5451491 (1995-09-01), Szajewski et al.
H.J. Price et al., Research Disclosure, vol. 157, "Use of persulfate bleaching agents in photographic processing", (May 1977).

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