Dry heat-activated bleaching of silver images

Details Dry heat-activated bleaching of silver images Dry heat-activated bleaching of silver images

1978-02-17

1979-09-18

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

With means for vapor or liquid contact

96 50R, 96 66T, 96 73, 961141, G03C 700, G03C 176, G03C 102

Patent

active

041681690

ABSTRACT:
A dry, activator sheet for a dry, thermal silver dye bleach process comprises a support having thereon a non-volatile, diffusible acid, a substituted heterocyclic thiazoline, oxazoline, imidazoline or imidazolidine silver halide complexing agent and a non-hydrolyzable polymer vehicle having an effective pH up to 6.0 and a melting point lower than 200.degree. C. The activating sheet is useful to bleach a silver image containing a bleachable dye.

REFERENCES:
patent: 3347675 (1967-10-01), Henn et al.
patent: 3414411 (1968-12-01), Michel et al.
patent: 3493372 (1970-02-01), Gompf et al.
patent: 3647440 (1972-03-01), Rasch
patent: 3708300 (1973-01-01), Luckey
patent: 3745009 (1973-07-01), Jenkins
patent: 3893859 (1975-07-01), Burness
patent: 3930859 (1976-01-01), Corrigan

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