| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat developable photosensitive material which does not cause increase in fog with time in a sample after developed, by using a laser light source to expose a heat developable photosensitive material containing org. silver salts. binder, photosensitive silver halides, and one kind of-compd. having a covalent bond of a nitrogen atom and a halogen atom on a supporting body. SOLUTION: A heat developable photosensitive material containing org. silver salts, binder, photosensitive silver halides, and compd. having a covalent bond of a nitrogen atom and a halogen atom on a supporting body is exposed by using a laser light source. The halogen atom in the compd. having a covalent bond is preferably a bromine atom. The compd. having a covalent bond of a nitrogen atom and a halogen atom is one kind of compd. expressed by the formula. In the formula, G1, G2 are hydrogen atoms or substituents which can be substituted with a nitrogen atom, or G1, G2 may have a partial structure having a covalent bond with a nitrogen atom and a halogen atom or may be bonded with each other to form a ring, and Hal is a halogen atom.
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