Heat-developable photosensitive material

Claim 1

In the process for forming an electrostatic latent image on an electrostatic printing master by subjecting the printing master to an electric charging treatment, developing the electrostatic latent image thus formed and transferring the developed image onto an image-receiving material, wherein said master is formed by the steps of (A) image wise exposing a heat developable photosensitive member comprising (1) a support, (2) an organic silver salt layer on said support which contains (i) an organic silver salt capable of isolating silver upon reduction, and (ii) a silver halide or halogen containing compound which reacts with the organic silver salt to produce silver halide, and (3) a reducing agent contained in the silver salt layer or adjacent thereto to reduce the organic silver salt and form a latent image, and (B) heat developing the latent image, the improvement comprising; (a) employing an infrared rays absorbing layer between said support and said silver salt layer and (b) conducting the step of heat developing the latent image by irradiating the image wise exposed member with infrared rays containing radiation, whereby said infrared rays absorbing layer converts said radiation to heat.