Patent ID: 7270945

Claim:
A method of forming an image using a photothermographic material containing a support having: an image forming layer which contains an organic silver salt, silver halide grains, a binder and a reducing agent on one side of the support; and a backing layer on the other side of the support opposite the image forming layer, the method comprising the steps of: imagewise exposing the photothermographic material to light to form a latent image; and simultaneously or sequentially heating the exposed photothermographic material to develop the latent image, wherein a center-line mean roughness Ra(E) of an outermost surface of a side having the image forming layer is from 125 to 200 nm; a ratio of a ten-point mean roughness Rz(E) of the outermost surface of the side having the image forming layer to a ten-point mean roughness Rz(B) the outermost surface of the side having the backing layer, Rz(E)/Rz(B), is from 0.10 to 0.70; and Rz(E) is from 3.0 to 5.0 μm.