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    • 6. 发明授权
    • Method for producing silver halide grain and silver halide emulsion
using the grain
    • 使用该颗粒生产卤化银颗粒和卤化银乳剂的方法
    • US5587281A
    • 1996-12-24
    • US501959
    • 1995-07-13
    • Mitsuo SaitouJunichi YamanouchiYoichi Hosoya
    • Mitsuo SaitouJunichi YamanouchiYoichi Hosoya
    • G03C1/005G03C1/043G03C1/07G03C1/047G03C1/035
    • G03C1/07G03C1/0051G03C1/043
    • Disclosed is a method for producing silver halide grains containing tabular grains having a thickness of from 0.02 to 0.3 .mu.m and an aspect ratio (diameter/thickness) of from 2 to 50 at a proportion of from 75 to 100% of the total projected area of silver halide grains, which comprises at least nucleation, ripening and growing steps in a dispersion medium solution consisting of water and a dispersion medium, wherein gelatin having the following characteristics (a) occupies from 30 to 100 wt % of said dispersion medium used in said growing step:characteristics (a)the relation between the number percentage of a chemically modified --NH.sub.2 group in the gelatin and the methionine content of the gelatin is in the region a.sub.1 depicted in FIG. 1.Also disclosed is a silver halide emulsion comprising at least a dispersion medium and silver halide grains produced by the above-described method.
    • 公开了一种制备厚度为0.02〜0.3μm,长宽比(直径/厚度)为2〜50的含有片状颗粒的卤化银颗粒的比例为总投影面积的75〜100%的方法 的卤化银颗粒,其在由水和分散介质组成的分散介质溶液中至少包含成核,成熟和生长步骤,其中具有以下特征的明胶(a)占所用分散介质的30-100重量% 所述生长步骤:特征(a)明胶中的化学修饰的-NH 2基团的数目百分比与明胶的甲硫氨酸含量之间的关系在图1所示的区域a1中。 还公开了包含至少一种分散介质和通过上述方法制备的卤化银颗粒的卤化银乳剂。