| 摘要 |
PROBLEM TO BE SOLVED: To provide a high contrast and high sensitivity silver halide photographic sensitive material. SOLUTION: In the silver halide photographic sensitive material having at least one silver halide emulsion layer on the base, at least one compound of the formula (X)l -(L)m -(A-B)n is contained and the sensitive material has a characteristic curve with gamma of >=5.0 in the optical density range of 0.3-3.0 as a characteristic curve shown on rectangular coordinate axes having equal unit lengths of logarithmic light exposure (x-axis) and optical density (y-axis). In the formula, X is a silver halide adsorptive group or a light absorbing group having at least one N, S, P, Se or Te atom; L is a divalent linking group having at least one atom selected from C, N, S and O; A is an electron donative group; B is a releasable group or H and forms a radical A. when released or deprotonated after oxidation; (l) and (m) are each an integer of 0-3; and (n) is 1 or 2.
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