Method of increasing speed of silver halide color photosensitive material

摘要

A method of increasing speed of a silver halide color photosensitive material. The photosensitive material has, on a support, a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a red-sensitive silver halide emulsion layer, and a nonsensitive layer. The method comprises adding, to the emulsion layer or the nonsensitive layer, a compound represented by formula (M) or (C): in the formula (M), R₁ represents H or a substituent, Z represents a group of non-metallic atoms required to form a 5-membered azole ring containing 2 to 4 nitrogen atoms, and X represents H or a substituent, and in the formula (C), Za represents -NH- or -CH(R₃)-, Zb and Zc represent -C(R₄)- or -N-, R₁, R₂ and R₃ represent an electron attractive group having a Hammett constant sigmap of 0.2 to 1.0, R₄ represents H or substituent, and X represents H or a substituent.