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引言近二十年来,人们利用晶核上包一层晶壳的银盐晶体来提高感光度,日益引起感光材料界的重视。有人曾研究过,晶核是纯溴化银、晶壳是多种成分的溴碘化银混晶的银盐晶体,或晶核是溴碘化银混晶、晶壳是纯溴化银晶体的制备方法和感光特性。目前,这一工作已转而研究由溴化银晶核和氯化银晶壳组成银盐晶体的感光特性。作者根据自己的一系列实验发现,无论在何种晶态的约0.3μ的溴化银晶体上,适当包一层氯化银晶壳,均能改善或提高乳剂的感光性能。
Introduction Nearly two decades, people use the crystal nucleus wrapped in a shell of silver salt crystals to improve the sensitivity, the increasingly sensitive material industry caused the attention. It has been studied that the crystal nucleus is pure silver bromide, the crystal shell is a silver salt crystal of a mixed crystal of silver bromoiodide or the crystal nucleus is a silver bromoiodide mixed crystal, the crystal shell is a method of preparing a pure silver bromide crystal, Sensitivity characteristics. At present, this work has been turned to investigate the photosensitive properties of a silver salt crystal composed of a silver bromide crystal nucleus and a silver chloride crystal crust. Based on a series of experiments, the author found that the appropriate silver chloride crystal shell can improve or enhance the photosensitivity of the emulsion regardless of the crystalline silver bromide crystal of about 0.3μ.