Patent ID: 6274297
Filing Date: 2001-08-14
Classification: G03C

Abstract:
A production process for a photothermographic recording material thermally developable under substantially water-free conditions comprising the steps of: (i) providing a support; (ii) producing one or more aqueous dispersions or solutions containing together a substantially light-insensitive organic silver salt, photosensitive ex-situ silver halide in catalytic association with said substantially light-insensitive organic silver salt, a reducing agent in thermal working relationship with said substantially light-insensitive organic silver salt and a binder; (iii) coating said one or more aqueous dispersions or solutions onto the support to form layers which upon drying become a photo-addressable thermally developable element; wherein said thermally developable element contains between 0.3 and 2.0 moles of in-situ photosensitive silver iodide per mole of ex-situ photosensitive silver halide, said silver iodide being produced by reacting particles of said substantially light-insensitive organic silver salt in an aqueous dispersions with a source of iodide ions, wherein said ex-situ photosensitive silver halide is silver bromide, silver chloride, silver iodide or a mixed crystal containing any combination thereof and said thermally developable element contains a source of bromine or chlorine radicals and wherein said substantially light-insensitive organic silver salt is a silver salt of an organic carboxylic acid.