Method for alleviating partial inactivation of color couplers

Details Method for alleviating partial inactivation of color couplers Method for alleviating partial inactivation of color couplers

1980-05-27

1981-10-06

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Intensifying

430386, 430429, 430432, 430943, G03C 700

Patent

active

042936381

ABSTRACT:
A method is disclosed for alleviating the partial inactivation of color couplers caused by adventitious reaction with vapors of formaldehyde or a vinyl monomer. Partial inactivation is evidenced by decreased spectral absorptivity of the dye produced by reaction of the color coupler with color dye-forming compounds, such as oxidized photographic color developing agents. The method comprises contacting a partially inactivated coupler with an aqueous solution comprising an oxidizing agent and an oxidation accelerator.

REFERENCES:
patent: 2623822 (1952-12-01), Duerr
patent: 3189452 (1965-06-01), Bard et al.
patent: 3841873 (1974-10-01), Mowrey et al.
patent: 3846130 (1974-11-01), Purol et al.
patent: 4094682 (1978-06-01), Fujiwhara et al.

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