Method of preparing coupler dispersions for photographic use

Details Method of preparing coupler dispersions for photographic use Method of preparing coupler dispersions for photographic use

1991-08-16

1992-04-28

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210644, 210651, 21050023, 430546, G03C 732

Patent

active

051086115

ABSTRACT:
A method of preparing a coupler dispersion in gelatin by separating the auxiliary coupler solvent using a hydrophobic microporous membrane and contacting the opposite surface of the membrane with a coupler solvent.

REFERENCES:
patent: 4233397 (1980-11-01), Tada et al.
patent: 5024929 (1991-06-01), Longheed et al.

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