| 摘要 |
PURPOSE:To prevent degradation of the cut at the foot part of a characteristic curve according to development time by using a chemically matured silver halide particle (core) and silver halide shell coating the core to constitute the core/shell type silver halide incorporated into an internal latent image type silver halide emulsion layer of a photosensitive material contg. a specific high- speed yellow color image forming coupler. CONSTITUTION:The internal latent image type silver halide emulsion layer of the direct positive color photosensitive material contg. one layer of the internal latent image type silver halide emulsion layer which is not previously fogged and at least the high-speed yellow color image forming coupler expressed by the formula as the color image forming coupler on a base contains the core/shell type silver halide emulsion. Said core/shell type silver halide is composed of the silver halide particle (core) chemically matured in the presence of cadmium, lead or ion or compd. of group VIII metals of periodic table or gold ion or compd. and the silver halide shell coating the core. In the formula, Q denotes an N-aryl carbomoyl group, Y denotes a coupling elimination group consisting of an oxygen atom or nitrogen atom as an elimination atom. |
