Thermoreversible organogels for photothermographic elements

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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430203, 430217, 430617, 430627, 430935, G03C 1015, G03C 1498, G03C 1494, G03C 179

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054159938

ABSTRACT:
A photographic emulsion containing: a photosensitive silver halide; a light-insensitive, reducible silver source; a reducing agent for the light-insensitive, reducible silver source; and a binder consisting essentially of poly(vinyl butyral) having a poly(vinyl alcohol) content of about 17.5 to 21.0 wt. % and at least one solvent selected from the group consisting of: toluene, methyl ethyl ketone, acetone, tetrahydrofuran, and 1,4-dioxane. Additionally, a process for coating a substrate involving applying at least one layer of a molten thermoreversible organogel layer; causing it to gel; and removing residual solvent.

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