Photographic color developer mixture

Details Photographic color developer mixture Photographic color developer mixture

1973-09-17

1976-11-30

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

G03C 530

Patent

active

039947300

ABSTRACT:
An aqueous alkaline developer mixture for preparing color photographic images containing a color developer of the p-phenylenediamine series a hydroxylamine compound and a hydroxyalkylidenediphosphonic acid or a water soluble salt of the said acid and at least a compound of the aminopolyphosphonic acid or of the aminopolycarboxylic acid series with improved resistance to oxidation and resistance to the formation of chalk deposits and high stability in storage.

REFERENCES:
patent: 3201246 (1965-08-01), Allen et al.
patent: 3647449 (1972-03-01), Malloy
patent: 3746544 (1973-07-01), Heilmann
patent: 3794591 (1973-09-01), Brown

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