Reducing post-process D.sub.min increase in positive redox dye-r

Details Reducing post-process D.sub.min increase in positive redox dye-r Reducing post-process D.sub.min increase in positive redox dye-r

1982-06-28

1983-10-11

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430212, 430236, 430242, 430223, G03C 140, G03C 554

Patent

active

044093152

ABSTRACT:
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 a pH of about 5 to about 6. The oxidant is 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 processing, the oxidant reacts with the electron transfer agent to prevent it from reacting with the dye releaser which would otherwise cause further dye release. D.sub.min stability is thereby improved.

REFERENCES:
patent: 3185567 (1965-05-01), Rogers
patent: 3880658 (1975-04-01), Lestina et al.
patent: 4088488 (1978-05-01), Chang et al.
patent: 4139379 (1979-02-01), Chasman et al.
patent: 4139389 (1979-02-01), Hirshaw et al.
patent: 4232107 (1980-11-01), Janssens
patent: 4256826 (1981-03-01), Popp et al.
patent: 4353975 (1982-10-01), Janssens et al.

Affiliated with

Also associated with

Rating

Reducing post-process D.sub.min increase in positive redox dye-r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reducing post-process D.sub.min increase in positive redox dye-r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing post-process D.sub.min increase in positive redox dye-r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1275778