Low replenishment color development using chloride ion-free colo

Details Low replenishment color development using chloride ion-free colo Low replenishment color development using chloride ion-free colo

1999-03-15

2000-01-25

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430490, 430492, 430493, G03C 7413

Patent

active

060176873

ABSTRACT:
An aqueous, homogeneous, single-part, chloride ion-free color developing concentrate comprises a color developing agent in free base form, an antioxidant for the color developing agent, a buffering agent, and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent present in an a concentration such that the weight ratio of water to the organic solvent is from about 15:85 to about 50:50. Upon dilution at least four times, this composition can be used to provide a color developing composition for processing photographic color papers. The same concentrate can also be diluted to provide a replenisher for the color developing composition that is used at a replenishment rate of from about 50 to about 150 ml/m.sup.2 of processed color paper.

REFERENCES:
patent: 3574619 (1971-04-01), Surash
patent: 3814606 (1974-06-01), Ozawa et al.
patent: 5273865 (1993-12-01), Loiacono et al.
patent: 5660974 (1997-08-01), Marrese et al.
patent: 5837435 (1998-11-01), Abe

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