Reversal imaging process including redox amplification

Details Reversal imaging process including redox amplification Reversal imaging process including redox amplification

1977-10-13

1979-03-27

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

With control means responsive to sensed condition

96 59, 96 50R, 96 29D, G03C 716, G03C 550, G03C 526, G03C 554

Patent

active

041463951

ABSTRACT:
A process is disclosed of forming a reversal dye image. This is accomplished by developing an imagewise exposed photographic element with a black-and-white developer and poisoning the developed silver as a redox amplification catalyst for a peroxide oxidizing agent. The undeveloped silver is then rendered developable to form a silver catalyst image pattern. This latter silver image pattern is then used to catalyze the redox reaction of a peroxide oxidizing agent and a dye-image-generating reducing agent, such as a color-developing agent, or a redox dye-releaser.

REFERENCES:
patent: 3658525 (1972-04-01), Bent et al.
patent: 3674490 (1972-07-01), Matejec
patent: 3694207 (1972-09-01), Matejec et al.
patent: 3776730 (1973-12-01), Matejec et al.
patent: 3862842 (1975-01-01), Bissonette
patent: 3953211 (1976-04-01), Imai et al.
Katz & Fogel, "Photographic Analysis", Morgan & Morgan, N.Y., N.Y. .COPYRGT. 1971, p. 102.

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