Oxygen barrier coated photographic coupler dispersion particles

Details Oxygen barrier coated photographic coupler dispersion particles Oxygen barrier coated photographic coupler dispersion particles

1992-11-12

1993-11-23

Lee, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430531, 430536, 430543, 430627, 430909, G03C 104

Patent

active

052643174

ABSTRACT:
The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescence of the particles. Photographic products formed with such materials are more dye stable.

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