Composition of a photographic color forming agent

Details Composition of a photographic color forming agent Composition of a photographic color forming agent

1984-12-04

1986-06-24

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430469, 430484, 430488, 430490, 430491, G03C 524

Patent

active

045967652

ABSTRACT:
A photographic color forming agent composition comprising an aromatic primary amine color developing agent and materials (A), (B), and (C). Material A is a compound having an aromatic ring bearing two hydroxy groups in the ortho positions thereof. Material B is a hydroxyalkylidene-diphosphonic acid metal ion chelating agent. Material C is at least one metal salt selected from the group consisting of the water-soluble metal salts of magnesium, bismuth, aluminum, zinc, barium, or zirconium. The metal salt is present in an amount in mols equivalent to or more than the amount in mols of metal ion chelating agents of B.

REFERENCES:
patent: 3746544 (1973-07-01), Heilmann
patent: 3839045 (1974-10-01), Brown
patent: 3994730 (1976-11-01), Frank et al.
patent: 4264716 (1981-04-01), Vincent et al.
patent: 4330616 (1982-05-01), Kurematsu et al.
Research Disclosure Apr. 1981, #20405, p. 149.

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