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照相明胶是感光材料的重要原材料之一。明胶中的金属离子和阴离子对感光材料乳剂的照相性能有一定的影响,测定照相明胶的电导率已为感光材料生产厂所关注。德国、日本等早已将电导率列为照相明胶测试项目之一。我国也在照相明胶标准修订中将电导率列入测试项目。本实验参考国外照相明胶分析报告和有关书籍制定了照相明胶电导率测试方法,并探讨了明胶浓度及温度对测定结果的影响。
Photographic gelatin is one of the important raw materials for photographic materials. The metal ions and anions in gelatin have certain influence on the photographic properties of the emulsion of the photosensitive material. The determination of the photoconductivity of the photographic gelatin has been paid attention to by the photosensitive material manufacturers. Germany, Japan, etc. have long been listed as one of the photographic gelatin test conductivity. China is also included in the photographic gelatin standard revision will be included in the test conductivity. This experiment with reference to foreign gelatin analysis report and related books developed photographic gelatin conductivity test method, and discusses the effect of gelatin concentration and temperature on the determination results.