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生产黑白或彩色感光材料,都要求在片基上进行明胶(或其他亲水胶体),卤化银乳剂的薄层涂布。进行薄层涂布,需要使用薄层乳剂。对薄层乳剂的要求是;含水量低,含银量高和银胶比高,乳剂层愈薄,则要求乳剂含银量和银胶比愈高。经过一段时间的试用,发现薄层乳剂有许多优点,如由于乳剂中含水量低,涂布后干燥时间短;乳剂层薄,加工较快;解象力高,成象清晰等。因此,近十多年来,薄层乳剂日益为人们所重视。
Production of black and white or color light-sensitive materials, require the film base on the gelatin (or other hydrophilic colloid), silver halide emulsion thin layer coating. Thin-layer coating requires the use of thin-layer emulsions. Thin-layer emulsion requirements are: low water content, high silver content and high silver-plastic ratio, the thinner the emulsion layer, the required silver content in the emulsion and the higher the silver-rubber ratio. After a period of trial and found that there are many advantages of thin-layer emulsion, such as due to low water content in the emulsion, drying time after coating is short; emulsion layer thin, faster processing; high resolution, imaging clear and so on. Therefore, for more than a decade, thin-layer emulsions are increasingly valued by people.