| 摘要 |
PURPOSE:To elevate sensitivity and to improve dradation and to enhance pressure resistance and stability against time lapse by incorporating monodispersed silver grains having (100) faces and (111) faces formed, in one of silver halide emulsion layers, and hardening the layers with a hardening agent shown as formula I, II. CONSTITUTION:A preferable silver halide compsn. of monodispersed halide grains is >=5mol silver halide, <=1mol% silver iodide, and the rest of silver bromide, substantially, silver bromochloride. As the monodispersed silver halide grains, tetradecahedral grains are desirable, and its use is selected by considering resistance to pressure effect. A preferable grain diameter of the silver halide contained in the emulsion layer 0.2- 2.0mu, especially, 0.3-1.2mu. As the hardening agent, compds. represented by formula I or II, and they may be added to one or more of the emulsion layers and auxiliary layers. In formula I, R1 is Cl, hydroxy, alkyl, alkoxy, alkylthio, -OM, -NR'R'', or -NHCOR'''; M is univalent metal atom; R', R'' are H, alkyl, or aryl respectively; R2''' is same as R' and R2 is same as R1 except Cl. In formula II, each of R3, R4, R'3,R'4 is Cl, hydroxy, alkyl, alkoxy, or -OM; M is same as M; each of Q, Q' is a bonding group of -O-, -S-, or -NH-; L is alkylene or arylene; and each of (p), (q) is 0 or 1.
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