HEAT DEVELOPABLE LIGHT-SENSITIVE MATERIAL

摘要

A heat developable light-sensitive material comprising a support having thereon at least one light-sensitive layer containing (1) an oxidation-reduction image-forming combination of(a) a silver salt oxidizing agent and (b) a reducing agent and (2) a catalytic amount of a light-sensitive silver halide or a compound capable of reacting with the silver salt (a) to form a lightsensitive silver halide, the light-sensitive layer further containing (3) at least one specific phthalazinone compound. The development of the above light-sensitive material is carried out simply by heating the material at a temperature of about 90 to 100.degree.C. for 1 to 60 seconds after imagewise exposure. An image of black tone can be obtained without contaminating the developing machine.