申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP0120661A2
公开(公告)日:1984-10-03
Heat developable color-image forming material has a layer containing (a) light-sensitive silver halide grains (b) a redox compound having a hydrophilic releasable dye moiety and a reducing group which, on heating, reduces imagewise exposed silver halide, mobile dye being then released, and (c) a compound which, on heating, releases a base, of a general formula:
the A groups being H or specified aliphatic or cyclic groups and X being a nucleophilic group.
Compound (C) preferably is 0.01-30 % by weight of the coating(s); 50 compounds are shown, with synthesis examples. Other basic substances or precursors can be present.
Development is by dry heating at 80°-250°C. to form a silver image and dye image which is transferred to unitary or separate fixing layer.
The material has good storage life and gives dye images of high density.
可加热显影的彩色图像形成材料有一层,其中含有 (a) 光敏卤化银颗粒 (b) 氧化还原化合物,该化合物具有亲水性可释放染料分子和还原基团,加热时可还原图像上暴露的卤化银,然后释放流动染料,以及 (c) 通式为加热时释放碱的化合物:
其中 A 基团为 H 或特定的脂肪族或环状基团,X 为亲核基团。
化合物(C)最好占涂层重量的 0.01-30%;图中有 50 种化合物,并附有合成实例。也可以含有其他基本物质或前体。
显影方法是在 80°-250°C 下干热,形成银像和染料像,然后转印到单元或单独的定影层上。
这种材料具有良好的储存寿命,并能产生高密度的染料图像。