Photographic products and processes

A photographic product comprising a photosensitive element comprising a plurality of layers including a support;

• a silver halide emulsion in a layer on said support;
• and in a layer on the same side of said support as said silver halide emulsion, a colorless precursor of a preformed image dye substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage in the presence of silver ions and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position that undergoes a .beta.-elimination reaction following the cleavage of said thiazolidinyl group, said moiety maintaining said precursor in its colorless form at least until said thiazolidinyl group undergoes said cleavage.

A photographic process for providing an imagewise distribution of a photographically useful reagent, which process includes the steps of developing a photosensitive element comprising an exposed silver halide emulsion with an aqueous alkaline processing composition;

• forming in partially developed and in undeveloped areas an imagewise distribution of silver ions and/or soluble silver complex;
• contacting said imagewise ditribution of silver ions and/or soluble silver complex with a compound comprising the radical of a photographically useful reagent substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage in that presence of said silver ions and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position that undergoes a .beta.-elimination reaction following by the cleavage of said thiazolidinyl group to provide said photographically useful reagent as a carbamic acid;
• and forming as a function of contacting said imagewise distribution of said silver ions and/or soluble silver complex with said compound, a corresponding imagewise distribution of said photographically useful reagent.

A photographic product comprising a photosensitive element comprising a plurality of layers including a support;

• a silver halide emulsion in a layer on said support;
• and in a layer on the same side of said support as said silver halide emulsion, a compound comprising the radical of a photographically useful reagent substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage in the presence of silver ions and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position that undergoes a .beta.-elimination reaction followed by the cleavage of said thiazolidinyl group to provide said photographically useful reagent as a carbamic acid.

A photographic product comprising first and second sheetlike elements, said first element comprising a plurality of layers including a support;

• a photosensitive silver halide emulsion in a layer on said support;
• in a layer in one of said first and second sheetlike elements, a compound comprising the radical of a photographically useful reagent substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage in the presence of silver ions and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position that undergoes a .beta.-elimination reaction activated by the cleavage of said thiazolidinyl group to provide said photographically useful reagent as a carbamic acid;
• and means for applying an aqueous alkaline processing composition to provide a silver halide developing agent and a silver halide solvent in a substantially uniform layer between said emulsion layer and said second sheetlike element in superposed relationship therewith.