https://opticalwhitener.com/product/optical-brightener-ksn/
Optical Brightener KSN Is A Higher Temperature Optical Brightener Agent For Polyester, Engineering Plastics. CAS 5242-49-9, Replace Hostalux KSN. Free Sample,...
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https://www.tonexchem.com/h-nd-79.html
Optical Brightener OB1 ismainly used for whitening polyester resin stock solutions and polyester fibers.
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