Thermally developable light-sensitive material

Claim 1

A thermally developable light-sensitive material comprising a support having therein or in at least one layer thereon (a) an organic silver salt, (b) a light sensitive silver halide or a component capable of forming a light sensitive silver halide upon reaction with said organic silver salt (a), and (c) a reducing agent, and additionally (d) at least one 1,2,4-triazole compound represented by the following formula (I): ##STR5## wherein M represents a hydrogen atom or an alkali metal atom and R 1 and R 2 , which may be the same or different, each represents a halogen atom, a nitro group or a carbon-containing substituent selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, which may be straight chain, branched chain or cyclic and which may be substituted with one or more of a halogen atom, a hydroxyl group, a carboxyl group or a carbon-containing substituent having 1 to 12 carbon atoms; an aryl group having 6 to 18 carbon atoms which may be monocyclic or bicyclic and which may be substituted with one or more of a halogen atom, a nitro group, a hydroxy group, a carboxy group or a carbon-containing substituent having 1 to 12 carbon atoms; a substituted oxy group, a substituted thio group, a substituted sulfinyl group, a substituted sulfonyl group or a substituted amino group having the general formulas, respectively: R'--o-- r'--s-- r'--so 2 -- r'--so 3 -- r' n --NH m -- or R"═N-- wherein n and m each represents 0 or an integer of 1 to 2, where n+m is equal to 2, and R' represents a carbon-containing substituent having 1 to 12 carbon atoms and wherein R" represents a 5- or 6-membered heterocyclic ring containing a nitrogen atom which may form a fused ring together with a benzene nucleus and which may be substituted with one or more alkyl groups having 1 to 4 carbon atoms; or a 5- or 6-membered heterocyclic ring which may form a fused ring together with a benzene ring and which may be substituted with one or more alkyl groups having 1 to 4 carbon atoms; wherein said component (d) is added after formation of a mixture of said component (a) and component (b).