Photographic color developer replenishing concentrates

Details Photographic color developer replenishing concentrates Photographic color developer replenishing concentrates

1997-12-15

1999-04-06

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430486, G03C 7413

Patent

active

058916091

ABSTRACT:
Improved one-part concentrated color developing replenishers and methods of preparation thereof comprising a photographically inert single ring heterocyclic amide. The replenisher concentrates are packaged in a single unit which upon dilution provides ready-to-use replenishing solutions for photographic materials. The concentrated replenishers are characterized by a one-part multi-phase concentrate wherein developing agents are retained in an upper phase and protected from deterioration which normally occurs in the highly alkaline lower phase.

REFERENCES:
patent: 3276875 (1966-10-01), Schwalenstocker
patent: 3479349 (1969-11-01), Allison et al.
patent: 3589921 (1971-06-01), Allison et al.
patent: 4232113 (1980-11-01), Marchesano
patent: 4987060 (1991-01-01), Marchesano
patent: 5376510 (1994-12-01), Parker et al.

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