| 摘要 |
<p>A light-sensitive material comprises a support and a light-sensitive layer containing silver halide, a reducing agent, an ethylenic unsaturated polymerizable compound and a base precursor in the form of a salt of an organic base with a carboxylic acid. The silver halide, reducing agent, polymerizable compound and base precursor are contained in microcapsules which are dispersed in the light-sensitive layer. The organic base of the base precursor is a diacidic to tetraacidic base which is composed of two to four amidine moieties and at least one linking group for the amidine moieties. The linking group is a residue of a hydrocarbon or a heterocyclic ring. The amidine moiety corresponds to an atomic group formed by removing one or two hydrogen atoms from an amidine having the following formula (I): <CHEM> wherein each of R<1>, R<2> R<3> and R<4> independently is hydrogen, an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group. an aralkyl group, an aryl group or a heterocyclic group, and any two of R<1>, R<2>, R<3> and R<4> may be combined together to form a five-membered or six-membered heterocyclic ring consisting of nitrogen and carbon atoms.</p> |
