发明授权
US6043011A Silver halide color photographic element having improved bleachability 失效
具有改善的漂白性的卤化银彩色照相元件

Silver halide color photographic element having improved bleachability
摘要:
A multilayer silver halide color photographic element comprises a support having coated thereon a silver antihalation layer, an interlayer, at least two red-sensitive silver halide emulsion layers, at least two green-sensitive silver halide emulsion layers a yellow filter layer, and at least two blue-sensitive silver halide emulsion layers, wherein a silver halide emulsion layer or a nonsensitive layer adjacent thereto comprises a bleach accelerator releasing coupler of formulaA-(TIME).sub.n -S-X-Rwherein A represents a coupler residue releasing from (TIME).sub.n -S-X-R upon reaction with the oxidation product of a color developing agent; TIME represents a timing group releasing S-X-R with delay under developing conditions; n represents 0 or 1; X represents a divalent linking groups consisting of an alkylene group containing 1 to 8 carbon atoms; and R represents a group selected in the group consisting of a), b) and c): ##STR1## wherein R.sub.1 represents hydrogen or a monovalent chemical group, n represents 0 or 1, Z represents the atoms necessary to complete a 5- or 6-membered ring or a fused ring, and R.sub.2 and R.sub.4, equal or different, each represents hydrogen, an alkyl group, an aryl group, --SO.sub.2 R.sub.4 or --COR.sub.4, wherein R.sub.4 represents an alkyl group or an aryl group. The invention provides reduction in residual silver levels after processing, without deleteriously affecting sensitometric properties and color reproduction performance of the photographic element.
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