Color developer concentrate for color film processing

Details Color developer concentrate for color film processing Color developer concentrate for color film processing

2006-02-14

2006-02-14

Le, Hoa Van (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

C430S467000, C430S486000, C430S490000, C430S492000

Reexamination Certificate

active

06998227

ABSTRACT:
An aqueous, homogeneous, single-part color developing concentrate comprises a color developing agent in free base form and an organic antioxidant. The concentrate also includes a water-miscible or water-soluble organic co-solvent and a quaternary ammonium salt to enhance its stability. The concentrate can be used to make a working strength processing solution, or it can be used as a replenishing composition with proper dilution, and is particularly useful for processing color negative or color reversal photographic silver halide films.

REFERENCES:
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patent: 5891609 (1999-04-01), Papai
patent: 5914221 (1999-06-01), Kim et al.
patent: 6077651 (2000-06-01), Darmon et al.
patent: 6664034 (2003-12-01), Keyes et al.
patent: 0 528 406 (1993-02-01), None
patent: WO 02/25371 (2002-03-01), None

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