OXYGEN BARRIER COATED PHOTOGRAPHIC COUPLER DISPERSION PARTICLES FOR ENHANCED DYE-STABILITY

摘要

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.