| 摘要 |
PURPOSE:To obtain the material having the excellent sharpness, graininess and storage stability by incorporating at most 5mol% a compd. capable of cleaving a developing restrainer or its precursor on the basis of the silver halide contd. in the photosensitive layer to the titled material. CONSTITUTION:The compd. in which the compd. cleaved by a coupling reaction with an oxidation product of a developing agent, is carried out the coupling reaction with an another oxidation product of the developing agent, thereby cleaving the developing restrainer or its precurser, is the compd. shown by the formula. The titled material comprises at most 5mol% on the basis of the silver halide contd. in the photosensitive layer. The two or more than two kinds of the compds. may be jointly used. The compd. as mentioned above, may be added to the layers except the max. sensitive layer and the silver halide emulsion layer (for example, the non-photosensitive emulsion layer adjacent to both the silver halide emulsion layer having the max. photosensitivity, and the silver halide emulsion layer having the substantially same color sensitivity and the different photosensitivity to the prescribed silver halide emulsion layer). |
