Black and white photothermographic material and method for fabricating thereof

Abstract

A black and white photothermographic material for laser exposure affording a large covering power and thus affording a high Dmax, and capable of suppressing desensitization in the course of the storage is provided. Such black and white photothermographic material contains on one side of a support a reducing agent for reducing silver ion, a binder, a non-photosensitive fatty acid silver salt and a photosensitive silver halide, wherein the photosensitive silver halide forms grains with an average grain size of 10 nm to 50 nm prepared independently from the non-photosensitive fatty acid silver salt; and wherein a compound expressed by the formula (1) below is further contained: [(Z)mL]nASM1  formula (1) [where, in the formula (1), Z represents —SO3M2, —COOR1, —OH or —NHR2; in which M2 being a hydrogen atom or an alkali metal atom, R1 being a hydrogen atom, an alkali metal atom or an alkyl group with having 1 to 6 carbon atoms, R2 being a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, —COR4, —COOR4 or —SO2R4, in which R4 being a hydrogen atom, an aliphatic group or an aromatic group; m is an integer not less than 1, and for the case of m≧2, the groups Z in a number of m may be same or different with each other; L represents a single bond or a linkage group; n is an integer not less than 1, and for the case of n≧2, the groups (Z)mL in a number of n may be same or different with each other; A is a heterocyclic group which may be substituted; and M1 is a hydrogen atom or an alkali metal atom.]

Dependencies are inferred from the claim text.