光学增光剂：即光学漂白剂。
Optical brightener(Optical brightness agent): Synonymous with Optical bleaching agent.
光学漂白剂：混入造纸浆料内，增加光白纸张的白度的化学剂；它的作用是使紫外光转为可见光。
Ooptical bleaching agent: a chemical which is used in the furnish of bright-white papers to enhance their brightness, and which does so by converting ultra-violet light into visible light.
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