THERMAL DIFFUSION-TRANSFER COLOR PHOTOGRAPHIC COMPOSITION AND PROCESS

A photothermographic composite structure and process for its use provides a color image by thermal diffusion. The photothermographic composite structure comprises: (a) an image-receiving element comprising a polymeric image-receiving layer having a glass transition temperature in the range of 20 DEG to 200 DEG C., and (b) strippably adhered to the image-receiving element, an imageable photothermographic element comprising in at least one layer, thereof a binder, a silver source material, photosensitive silver halide in catalytic proximity to the silver source material, if necessary a reducing agent for silver ion, and a leuco base dye.