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用透射电子显微镜观察一步摄影正片(明胶介质)的银颗粒,对影响银颗粒大小的因素进行了研究。卤化银负片乳剂中的碘含量,明显地影响卤化银颗粒大小和转印后银颗粒的大小,随着卤化银乳剂中的碘含量减少,卤化银颗粒和银质点簇(即银颗粒)变大,组成银质点簇的银质点数目增多,正象色调由棕向黑转移。不同物理显影核亦显著影响正片银颗粒大小与其色调。
The silver particles of the one-step photographic film (gelatin medium) were observed with a transmission electron microscope, and the factors affecting the size of the silver particles were studied. The amount of iodine in the silver halide negative emulsion significantly affects the size of the silver halide grains and the size of the silver particles after transfer. As the iodine content in the silver halide emulsion decreases, the silver halide grains and the silver particle clusters (i.e., silver grains) become larger , The number of silver dots that form the silver particle cluster is increased, just as the color tone is transferred from the brown to the black. Different physical development of nuclear also significantly affect the positive silver particle size and color tone.