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公开(公告)号：US5512415A
公开(公告)日：1996-04-30
申请号：US400078
申请日：1995-03-07
摘要： A high-contrast photographic element, adapted for use in the field of graphic arts, includes a hydrazide nucleator and an amine booster and comprises a silver halide emulsion layer which is capable of forming a latent image under conditions of use and a second silver halide emulsion layer which is not capable of forming a latent image under conditions of use.
摘要翻译： 适用于图形领域的高对比度照相元件包括酰肼成核剂和胺促进剂，并且包含能够在使用条件下形成潜像的卤化银乳剂层和第二卤化银乳剂 在使用条件下不能形成潜像的层。
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公开(公告)号：US06383711B1
公开(公告)日：2002-05-07
申请号：US09622763
申请日：2000-08-21
IPC分类号： G03C106
CPC分类号： G03C1/035 , G03C1/0051 , G03C1/061 , G03C1/08 , G03C5/30 , G03C2001/0055 , G03C2001/03511 , G03C2001/03564 , G03C2001/0863 , G03C2001/108 , G03C2200/44
摘要： A high contrast photographic material comprises a support bearing a silver halide emulsion layer, containing in the emulsion layer or in an adjacent hydrophilic layer, a hydrazide nucleating agent characterized in that the emulsion layer contains silver halide grains of octahedral character which are spectrally sensitized and silver halide grains which are not octahedral in character eg cubic. Preferably only the grains which are octahedral in character are spectrally sensitized. Preferably the emulsion layer or an adjacent hydrophilic colloid layer contains a booster compound eg an amine rendering the material developable in a developer solution having a pH below 11. Preferably both types of grain are chemically sensitized. The use of tabular grains as causer emulsions enhances the absorption characteristics of the dyes so that as well as providing high photographic sensitivity the dye peaks are broadened.
摘要翻译： 高对比度照相材料包括载有卤化银乳剂层的载体，在乳剂层或相邻的亲水层中包含酰肼成核剂，其特征在于乳剂层含有八面体特征的卤化银颗粒，其具有光谱增感和银 卤素颗粒不是八面体，特征如立方体。优选地，仅八面体的颗粒是光谱敏化的。优选地，乳剂层或相邻的亲水胶体层含有增强化合物，例如胺，使得可显影于具有 pH低于11.优选两种类型的颗粒都化学增感。 使用片状颗粒作为引发剂乳液增强染料的吸收特性，从而提供高照相感光度使染料峰变宽。
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