Patent ID: 7262001

Claim:
A heat-developable photosensitive material having an image forming layer containing organic silver salt, silver halide which contains silver iodide in a ratio of from 40 mole-percent to 100 mole-percent, binder and a reducing agent, wherein a value of Rz(E)/Rz(B) is from 0.1 to 0.7 in which Rz(E) is the ten-point average surface roughness of the outermost surface of the image forming layer side on a support and Rz(B) is the ten-point average surface roughness of the outermost surface of the opposite side through the support; wherein the value of Ra(E)/Ra(B) is from 0.6 to 1.3 when Ra(E) is the center-line average surface roughness of the surface of the image forming layer side and Ra(B) is the center-line average surface roughness of the surface of the opposite side through the support; the value of Rz(E)/Ra(E) is from 12 to 60; and the value of Lb/Le is from 2.0 to 10 in which Lb is the average particle diameter of the matting agent having the highest average particle diameter contained in a layer on the back coat layer side of the support and Le is the average particle size of a matting agent having the largest average particle size contained in a layer on the opposite side through the support.