PD照相材料属非银盐系统,是一种采用物理显影的金属重氮感光材料,具有极高的解象力和较高的感光度,其感光物质是以分子状态均匀分布在载体中。曝光时,感光物质分子被激活或钝化而形成分子潜影,随即进行核化反应,产生金属潜象核,最后采用物理显影形成金属图象。 PD照相材料可用作缩微和超缩微胶片、 PD photographic material is a non-silver system, is a use of physical development of metal diazo photosensitive material, with high resolution and high sensitivity, the photosensitive material is evenly distributed in the molecular state in the carrier. Exposure, the photosensitive material molecules are activated or passivation to form a molecular latent image, followed by nucleation reaction, resulting in a metal latent image nucleus, and finally the use of physical development to form a metal image. PD photographic materials can be used as microfilm and microfilm,