Uniformly mixed dry photographic developing composition containi

Details Uniformly mixed dry photographic developing composition containi Uniformly mixed dry photographic developing composition containi

1999-01-21

2000-07-25

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

G03C 530

Patent

active

060935235

ABSTRACT:
A powdered, uniformly mixed photographic developing composition is prepared with intense mixing of dry photoprocessing chemical components, one of which is a photographic developing agent, and by forming uniformly sized agglomerates of the mixed powder. During agglomeration, a solution of a binder material is applied in a controlled manner to enable the mixed powder particles to stick together but without leaving much residue in the final composition. With this process, the mixed powder and agglomerates each have desired uniformity in size and chemical composition. The resulting dry uniformly mixed developer composition is highly stable, dissolvable and substantially free of dust. An antioxidant is also applied to the dry uniform mixture during agglomeration to reduce the loss of developing agent activity.

REFERENCES:
patent: 5135840 (1992-08-01), Reuter et al.
patent: 5278036 (1994-01-01), Kobayashi et al.
patent: 5510231 (1996-04-01), Komatsu et al.

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