Method of preparing coupler dispersions

Details Method of preparing coupler dispersions Method of preparing coupler dispersions

1991-07-29

1995-01-10

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

430546, 430631, 430634, 430635, 430636, 210634, 210644, 210799, 252314, G03C 7388

Patent

active

053806280

ABSTRACT:
Fine particle photographic coupler dispersions are prepared by forming a dispersion of a photographic coupler, coupler solvent and auxiliary coupler solvent in an aqueous gelatin medium containing at least about 1% by weight of an anionic surfactant selected from the group consisting of alkali metal salts of alkarylene sulfonic acids, alkali metal salts of alkyl sulfates, alkaryl sulfonate salts, and alkyl sulfosuccinates; and washing the dispersion with water for a time sufficient to remove at least one-fourth of the surfactant.

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PCT International Search Report, PCT/US/92/06225.
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