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.
结果表明该类化合物具有很好的光学漂白性，含卤素取代酞菁的漂白效果明显好于不含卤素酞菁的效果。
Results showed that this kind of compounds has excellent photobleaching property. The bleaching effect of phthalocyanines containing halogen substituent is better than the one that is not substituted.
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