Thermally developable photosensitive material

摘要

The present invention relates to, a thermally developable photosensitive material containing a non-photosensitive organic silver salt, photosensitive silver halide and a reducing agent on at least one surface of a transparent substrate, wherein a fog density value immediately after thermal developing treatment is 0.20 or less, a value of b0* in the following equation (1) at a fog density portion satisfies -20 ≤ b0* < -4, and a change in an image tone from immediately after thermal developing treatment to after a point when an amount of time has passed as a value of a color difference DELTA E as defined in the equation (1) is any one of (a) 1.2 or less at 9 months under an environment of 30 DEG C and 60% RH, (b)1.2 or less at 3 months under an environment of 40 DEG C and 40% RH, or (c) 0.9 or less at 1 week under an environment of 45 DEG C and 40% RH. Equation (1) DELTA E = Ä(L1*-L0*)<2> + (a1*-a0*)<2> + b1*-b0*Ü<2>Ü<1/2>