Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent, a polymerizable compound and a color image forming substance provided on a support, characterized in that the color image forming substance is a triazene compound having the following formula: ##STR1## in which Ar is an aryl group or a heterocyclic group, each of which may have one or more substituent groups; each of R.sup.1 and R.sup.2 independently is a group selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, an aryl group and a heterocyclic group, each of which may have one or more substituent groups, or R.sup.1 and R.sup.2 form, together with the neighboring nitrogen, a heterocyclic group which may have one or more substituent groups; and n is 1, 2 or 3. An image forming method utilizing the light-sensitive material is also disclosed.

Abstract: A heat developable light-sensitive material comprising a support having thereon at least a layer containing a novel compound having a group accelerating a reaction of decarboxylation, which releases a base by decarboxylation on heating. The heat developable light-sensitive material provides an image having a high density in a short time and has an improved storage stability.