申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0532192A1
公开(公告)日:1993-03-17
A black and white photographic element comprising as a photosensitive medium a layer of a silver halide emulsion characterised in that the photosensitive medium comprises in the same layer or in an adjacent layer thereto, a developer comprising a substantially non-diffusing polymeric compound having as a component part of its structure a plurality of units having a nucleus of general formula (I):
in which;
each Z independently represents -OH or a group which leaves an -OH residue when contacted with an alkali (pH ≧10) at temperatures of ≦50°C.
一种黑白照相元件,包括一层卤化银乳剂作为感光介质,其特征在于该感光介质在同一层或相邻一层中包括一种显影剂,该显影剂包括一种基本上不扩散的高分子化合物,其结构的组成部分是具有通式(I)核的多个单元:
其中
每个 Z 独立地代表-OH 或在温度≦50℃下与碱(pH ≧10)接触时会留下-OH 残余物的基团。