Oxygen barrier coated photographic agent milled dispersion parti

Details Oxygen barrier coated photographic agent milled dispersion parti Oxygen barrier coated photographic agent milled dispersion parti

1994-08-18

1996-10-15

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

430493, 430546, 430631, 430138, G03C 518, G03C 526

Patent

active

055653090

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. The dispersions of this invention are prepared by mechanical milling or homogenization procedures.

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