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    • 4. 发明授权
    • Method to spectrally sensitize tabular silver halide grains
    • 对片状卤化银颗粒进行光谱敏化的方法
    • US06300051B1
    • 2001-10-09
    • US09271372
    • 1999-03-18
    • Marc Van den ZegelKathy Elst
    • Marc Van den ZegelKathy Elst
    • G03C100
    • G03C1/0051G03C1/09G03C1/18G03C1/29G03C1/40G03C2001/091G03C2001/096G03C2001/097
    • A method has been disclosed for preparing a tabular silver halide emulsion wherein tabular silver halide grains having an average aspect ratio of at least 2:1, an average crystal diameter from 0.3 &mgr;m to 3.0 &mgr;m and an average thickness of less than 0.50 &mgr;m account for at least 50% of the total projective surface area of said grains, said method comprising the steps of precipitating, spectrally sensitizing and chemically ripening said grains, characterized by spectrally sensitizing by adding to the emulsion grains before chemically ripening at least one J-band aggregating spectrally sensitizing dye and at least one non-J-band aggregating dye. A light-sensitive silver halide emulsion having at least one J-band aggregating dye and at least one non-J-band aggregating dye comprising said tabular grains has also been disclosed as well as a light-sensitive silver halide photographic X-ray material comprising a support, at least one hydrophilic colloid layer on at least one side of said support and one or more photosensitive layer(s) comprising the said silver halide photographic emulsion and a radiographic screen-film combination comprising at least one X-ray intensifying screen in operative association with the said material.
    • 已经公开了制备片状卤化银乳剂的方法,其中平均长宽比为至少2:1,平均晶体直径为0.3μm至3.0μm,平均厚度小于0.50μm的片状卤化银颗粒占 所述方法包括以下步骤:使所述晶粒沉淀,光谱增感和化学熟化,其特征在于通过在化学成熟至少一个J-带聚集体之前加入到乳液颗粒中进行光谱增感 光谱增感染料和至少一种非J-带聚集染料。 还公开了具有至少一个J带聚集染料和包含所述片状颗粒的至少一种非J带聚集染料的感光卤化银乳剂以及感光卤化银照相X射线材料,其包含 载体,至少一个位于所述载体的至少一侧上的亲水胶体层和包含所述卤化银照相乳剂的一个或多个感光层和包含至少一个X射线增强屏幕的射线照相屏幕膜组合, 与所述材料的操作性关联。