Certain members of the class of odd-numbered methine arylidene dye bases are found to be of use in thermally-developable photosensitive compositions and thermally-developable photosensitive elements containing such agents. These compounds are acutance agents which are relatively stable against photo-bleaching but undergo thermochemical bleaching on heating in silver salt-containing thermally-developable photosensitive compositions.
奇数
甲烷芳基亚甲基
染料基类的某些成员被发现可用于热敏感感光组合物和含有这些试剂的热敏感感光元素中。这些化合物是锐度试剂,相对稳定于光漂白,但在含有
银盐的热敏感感光组合物中受热时会发生热
化学漂白。