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    • 2. 发明授权
    • Photographic elements containing light scattering particles
    • 含有光散射颗粒的照相元件
    • US6027869A
    • 2000-02-22
    • US213644
    • 1998-12-17
    • Joe E. MaskaskyKenneth J. ReedVictor P. ScacciaJames A. Friday
    • Joe E. MaskaskyKenneth J. ReedVictor P. ScacciaJames A. Friday
    • G03C7/00G03C1/005G03C1/035G03C1/04G03C1/08G03C1/10G03C1/825G03C7/30
    • G03C1/8255G03C1/0051G03C1/04G03C1/10G03C7/30Y10S430/151
    • A photographic element is disclosed having at least one emulsion layer comprised of (a) radiation-sensitive silver halide grains, (b) sensitizer for the radiation-sensitive silver halide grains, (c) hydrophilic colloid vehicle, including peptizer for the radiation-sensitive silver halide grains, and (d) light scattering particles, wherein (a) the radiation-sensitive silver halide grains include tabular grains (1) having an aspect ratio of at least 2.0, (2) having {111} major faces, (3) containing greater than 50 mole percent bromide, based on silver, and (4) accounting for greater than 50 percent total grain projected area, (b) the sensitizer includes a fragmentable electron donating sensitizer, (c) the peptizer is a water dispersible cationic starch, and (d) the light scattering particles have aspect ratios of less than 1.5 and can be dissolved for removal from the emulsion layer. The photographic elements exhibit enhanced imaging speed and can be employed for color or black-and-white photographic imaging.
    • 公开了一种照相元件,其具有至少一个由(a)辐射敏感卤化银颗粒组成的乳剂层,(b)用于辐射敏感卤化银颗粒的敏化剂,(c)亲水胶体载体,包括用于辐射敏感的卤化银颗粒的胶溶剂 卤化银颗粒和(d)光散射颗粒,其中(a)辐射敏感性卤化银颗粒包括纵横比为至少2.0,(2)具有{111}主面的片状颗粒(1),(3 ),(b)占总颗粒投影面积的50%以上;(b)敏化剂包括可裂解的给电子增感剂,(c)胶溶剂是水分散性阳离子 淀粉,和(d)光散射颗粒具有小于1.5的纵横比,并且可溶解以从乳剂层中除去。 照相元件表现出增强的成像速度,并且可用于彩色或黑白照相成像。