To improve the post-treatment stability of a photothermographic material.
The black-and-white photothermographic material is sensitive at a wavelength greater than 700 nm, and includes a support having thereon one or more thermally developable imaging layers containing a binder and in reactive association, a photosensitive silver halide, a non-photosensitive source of reducible silver ions, a reducing composition for the non-photosensitive source reducible silver ions and a spectral sensitizing dye for the photosensitive silver halide which is a merocyanine dye or a cyanine dye having one or more thioalkyl, thioaryl or thioether groups. The one or more thermally developable layers further contain a substituted propenenitrile compound and one or more indolenine dyes as post-processing stabilizing compounds.
HUNT BRYAN V
RAMSDEN WILLIAM D
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