Photographic recording material

Abstract

A photographic recording material on a transparent support having at least one light-sensitive silver halide emulsion layer and optionally conventional interlayers and protective layers, characterized in that the photographic recording material contains, in at least one of the above-mentioned layers, a compound corresponding to formula I, II or III ##STR1## wherein R.sub.1 denotes an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted heterocyclic group, R2 denotes hydrogen, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted alkylthio group, R.sub.3 denotes hydrogen or an unsubstituted or substituted alkyl group, R4 denotes an unsubstituted or substituted alkyl group, an unsubstituted or a substituted aryl group or an unsubstituted or substituted heterocyclic group, X denotes an alkylene group having 1 to 8 carbon atoms in which the carbon chain may be interrupted by oxygen or sulphur atoms, or it denotes an arylene group, and Z denotes hydrogen, a cation or a precursor compound thereof which is capable of releasing the mercapto compound non-imagewise in the course of development, is distinguished by excellent interimage and edge effects and by improved sharpness and graininess compared with conventional materials.

Dependencies are inferred from the claim text.