Reducing post-process d-min increase in positive redox...

Details Reducing post-process d-min increase in positive redox... Reducing post-process d-min increase in positive redox...

G - Physics

03

C

96/282, 96/32

G03C 8/08 (2006.01) G03C 8/52 (2006.01) G03C 11/08 (2006.01)

Patent

CA 1182674

-0- REDUCING POST-PROCESS D-MIN INCREASE IN POSITIVE REDOX DYE-RELEASING IMAGE TRANSFER SYSTEMS Abstract of the Disclosure Photographic assemblages are described employing positive-working redox dye-releasers and a cover sheet containing an oxidant having an electrode potential of from about -200 mV up to about 1000 mV versus a saturated calomel electrode at M pH of about 5 to about 6. The oxidant capable of oxidizing electron transfer agent in the system. The reduced form of the oxidant is incapable of reducing the positive-working redox dye-releaser. After process- ing, the oxidant reacts with the electron transfer agent to prevent it from reacting with the dye releaser which would otherwise cause further dye release. Dmin stability is thereby improved.

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