Dry heat-activated bleaching of silver images

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

G - Physics

03

C

96/27, 96/71

G03C 7/00 (2006.01) C07D 277/36 (2006.01) C07D 277/56 (2006.01) G03C 1/498 (2006.01) G03C 1/76 (2006.01) G03C 5/26 (2006.01) G03C 7/28 (2006.01)

Patent

CA 1082514

Abstract of the Disclosure 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 com- plexing agent and a non-hydrolyzable polymer vehicle having a pH of 6.0 or less and a melting point lower than 200°C. The activating sheet is useful to bleach a silver image con- taining a bleachable dye. - 1 -

251711

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