Optical brighteners agent also is known as fluorescent whiteners, is widely used in the paper, detergent, plastics, textile industries. They are used to brighten products by achieving a whitener looking.
Typical optical brighteners are listed as follows;
1. Paper, optical brightener VBL, and BBU.
2. Detergent, optical brightener CBS-X.
3. Plastics, optical brightener OB, OB-1, KSN, KSB, KCB and, FP-127.
4. Textile, optical brightener 4BK, ER-I, ER-II and EBF.
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