Sensitometric consequences of pre-exposure heating on Thermally Developed Photographic Materials (TDPM)

Reduction of sensitometric image parameters of two-layer thermally developed photographic materials, subjected to pre-exposure heating, is connected with the presence of toners in the photolayer. It is shown that incorporating the developing agent in the photolayer and the toners in the protective layer improves sensitometric image parameters of such materials. Mechanisms for the effects are discussed.