Thermally developable light-sensitive material

Abstract

A thermally developable light-sensitive material comprising a support and containing at least (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent and (d) a color toning agent in the support or in at least one layer provided on the support, wherein the color toning agent is at least one 2H-1,3-benzothiazin-2,4(3H)-dione, e.g., having the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, a hydroxy group, an acyloxy group, a nitro group, an amino group, an alkyl-substituted amino group, an aryl-substituted amino group, an acylamino group, an acyl group, a hydroxycarbonyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfamoyl group, an alkyl-substituted sulfamoyl group, an aryl-substituted sulfamoyl group, an alkylsulfonyl group, an arylsulfonyl group or a sulfo group, further, R.sub.1 and R.sub.2, R.sub.2 and R.sub.3, and/or R.sub.3 and R.sub.4, may combine and represent the atoms necessary to form a condensed aromatic ring; and, further, one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be a monovalent residue of the general formula (I), in which the color toning effect is retained even under conditions of high temperature and/or high humidity.