Photographic elements containing anionic organic acids

Details Photographic elements containing anionic organic acids Photographic elements containing anionic organic acids

1972-11-20

1977-11-08

Brammer, Jack P.

Gas separation: apparatus

Electric field separation apparatus

With nonelectrical gas treating or conditioning means

96 55, 96114, G03C 700, G03C 300, G03C 172

Patent

active

040574288

ABSTRACT:
Photographic elements are described which comprise a support having thereon at least one image dye-providing layer unit and at least one layer containing an immobile anionic organic acid having an equivalent weight based on acid groups of at least 70 and less than 800. In one embodiment, photographic elements of this invention can be contacted with a transition metal-ion complex such as a cobalt(III) ion complex before contact with a fixing bath and sufficient transition metal ion will be retained in the photographic element to bleach the silver in said element.

REFERENCES:
patent: 3022172 (1962-02-01), Ohba et al.
patent: 3251689 (1966-05-01), Hallmig
patent: 3402046 (1968-09-01), Zwick
patent: 3411904 (1968-11-01), Becker
patent: 3411911 (1968-11-01), Dykstra
patent: 3411912 (1968-11-01), Dykstra
patent: 3591382 (1971-07-01), Millikan
patent: 3676141 (1972-07-01), Hara et al.
patent: 3765891 (1973-10-01), Travis

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