申请人:EASTMAN KODAK COMPANY
公开号:EP0735415A1
公开(公告)日:1996-10-02
A photographic element comprising a light sensitive silver halide emulsion sensitized with a dye of formula (I) and a nucleating agent or amine booster associated with the silver halide emulsion:
wherein:
R3 is an alkyl group, alkenyl group, or aryl group
R4 and R5 are each hydrogen, an alkyl group, alkenyl or aryl group;
R6, R7 and R8 are, independently, an alkyl group, alkenyl group, aryl group, or H;
the dye has at least three acid or acid salt substituents; and
each L independently represents a methine group;
p is 0 or 1;
Z1 represents the atoms necessary to complete a 5- or 6-membered heterocyclic ring group;
(X)n represents counterions as needed to balance the charge on the molecule.
The present invention also provides a process for forming a high contrast photographic image on a photographic element having a light sensitive silver halide emulsion sensitized with a dye of formula (I). The process comprises developing such a photographic element in the presence of a hydrazine compound and an amine booster.
一种感光元件,包括用式 (I) 染料感光的卤化银乳剂和与卤化银乳剂相关的成核剂或胺增效剂:
其中
R3 是烷基、烯基或芳基
R4 和 R5 分别是氢、烷基、烯基或芳基;
R6、R7 和 R8 分别是烷基、烯基、芳基或 H;
染料具有至少三个酸或酸式盐取代基;以及
每个 L 独立地代表一个甲基;
p 为 0 或 1;
Z1 代表完成 5 或 6 元杂环基团所需的原子;
(X)n 代表平衡分子电荷所需的反离子。
本发明还提供了一种在具有用式(I)染料感光的光敏卤化银乳剂的照相元件上形成高对比度照相图像的工艺。该工艺包括在肼化合物和胺促进剂的存在下显影这种感光元件。