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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。感光物质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而形成分子潜影,进行核化后,产生金属潜影核,最后采用物理显影形成金属图象。PD 照相材料的感光度在非银体系中是相当高的。和一般重氮盐材料及微泡材料比较,它的感光度大约高60倍。即使如此,其感光度也还可能进一步提高。
PD photographic material is a non-silver system, is a physical development of metal diazo photosensitive material, with high resolution and high sensitivity. Photosensitive substances are evenly distributed in the carrier in a molecular state. Exposure, the photosensitive material molecules are activated to form a molecular latent image, after nucleation, resulting in a metal latent nucleus, the final use of physical development to form a metal image. The sensitivity of PD photographic materials is quite high in non-silver systems. And the general diazonium salt materials and micro-bubble material compared to its sensitivity about 60 times higher. Even so, its sensitivity may also be further improved.