| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat developable photosensitive material having low Dmin (fog), high Dmax (maximum density) and ultrahigh contrast, generating no black spots, less liable to increase Dmin after heat development and optimum for use in a photomechanical process. SOLUTION: In the heat developable photosensitive material having at least a non-photosensitive organic silver salt, photosensitive silver halide, a reducing agent for silver ions, a nucleus forming agent and a binder on the base, a benzotriazole derivative of formula (1) (where R<1> is a <=20C alkyl or alkenyl, a <=20C aryl, alkaryl or aralkyl, a 3- to 6-membered aliphatic heterocyclic group, a 3- to 6-membered aromatic heterocyclic group or a 3-to 6-membered aliphatic hydrocarbon group and R<2> -R<5> are each H or a substituent) is contained.
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