The present invention relates to a direct positive silver halide photosensitive material and a method for forming a direct positive image. By the use of a novel nucleating agent having a specific structural formula, the present invention provides a direct positive silver halide photosensitive material with an increased Dmax value and a decreased Dmin value, as compared with the use of the conventional nucleating agents, even if a small amount of the novel nucleating agent is used, and does not substantially reduce the Dmax value, even if the photosensitive material is kept in a high-humidity state for a long time before exposure.
本发明涉及一种直接正片式的
银卤片光敏材料和形成直接正片式图像的方法。通过使用具有特定结构式的新型成核剂,本发明提供了一种直接正片式的
银卤片光敏材料,与使用传统成核剂相比,即使使用少量的新型成核剂,也可以提高Dmax值并降低Dmin值,并且即使在曝光前长时间保持在高湿度状态下,也不会显著降低Dmax值。