A silver salt photothermographic dry imaging material comprising a support
having: (i) a photosensitive layer comprising photosensitive silver
halide grains, an organic silver salt and a reducing agent for silver
ions on one side of the support; and (ii) a backing layer on a side of
the support opposite the photosensitive layer, comprising: (a) organic
solid lubricant particles having an average diameter of 1.0 to 30 .mu.m;
and (b) inorganic microparticles or organic microparticles.