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  • CAS NO.1533-45-5 Optical Brightener OB-1 is kind of plastics additives can absorb UV light then emit visible blue light to reduce the yellowish and make the products more white. Optical Brightener OB-1 mainly used in whitening of polyester and plastic, as well in whitening of Nylon during polymerization,also used in ABS, PS, HIPS, PA, PC, PP, PET,EVA, PVC, etc.

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