Patent ID: 7029834

Claim:
A photothermographic material that comprises a support having on a frontside thereof, one or more thermally-developable imaging layers comprising a binder and in reactive association, a photosensitive silver halide, a non-photosensitive source of reducible silver ions, and a reducing composition for said non-photosensitive source reducible silver ions, and on a nonphotosensitive backside of said support, a backside layer comprising a binder and a backside stabilizer present in an amount of at least 0.01 mmol/m 2 , said backside stabilizer being a nitrogen-containing aromatic heterocyclic compound represented by one of the following Structures I and II: wherein each X in Structure I is independently N, or C—R 4 provided that at least one of X is N, and each X in Structure II is independently N, N—R 2 , or provided that no more than 3 of X is N or N—R 2 , m is 1 or 2, and when m is 1, R 1 represents one hydroxy group or represents one or more of the same or different groups that are hydrogen, mercapto, carboxy, alkyl or aryl carboxy, alkyl or aryl sulfonyl, alkyl, aryl, alkyloxy, aryloxy, alkenyl, halo, or haloalkyl groups, or two adjacent R 1 groups can be combined to form a substituted or unsubstituted alicyclic, heterocyclic, aromatic, or heteroaromatic fused ring, R 3 represents hydrogen, hydroxy, carboxy, alkyl or aryl carboxy, alkyl or aryl sulfonyl, alkyl, aryl, alkyloxy, aryloxy, alkenyl, halo, or haloalkyl groups, R 2 represents hydrogen, alkyl, or alkali metal groups, R 4 represents one or more of the same or different groups that are hydrogen, halo, carboxy, alkyl or aryl sulfonyl, alkyl, aryl, alkyloxy, aryloxy, or alkenyl groups, or two adjacent R 4 , or R 1 and R 4 , or R 2 and R 4 , or R 3 and R 4 groups can be combined within their respective structures to form a substituted or unsubstituted alicyclic, heterocyclic, aromatic, or heteroaromatic fused ring, R 5 represents hydrogen, alkyl, alkenyl, alicyclic, heterocyclic, aryl, or heteroaryl groups, and when m is 2, each L independently represents a direct bond or a non-conjugated organic linking group comprising from 1 to 5 carbon atoms in the chain.