BLACK-AND WHITE HEAT DEVELOPING PHOTOSENSITIVE MATERIAL AND BLACK-AND-WHITE IMAGE FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain an ultrahigh-contrast heat developing photosensitive material hard to increase fog even during storage for a long period of time and a heat developing photosensitive material hardly increasing fog in the unexposed part of the material when the material is allowed to stand in a light room after development. ;SOLUTION: This black-and-white heat developing photosensitive material contains at least a binder, silver halide, an org. silver salt, a hydrazine deriv. and at least one of compds. represented by the formulae X₁-(J)_n-(B), Q-X₂ and A-X₃ on the substrate. In the formulae, each of X₁-X₃ is a residue of a photographic inhibitor having an N-contg. hetero ring, J is a divalent bonding group, B is a ballast group, (n) is an integer of ≥1, Q is an ethylenic unsatd. group or a group having an ethylenic unsatd. group and A is a group having a water- soluble group.;COPYRIGHT: (C)1998,JPO