CAS:7128-64-5 OB can be used for whitening thermoplastic,Plastics,PVC,PS,PE,PP,ABS,Acetate fiber,paint,coating,printing Ink,etc..It can be added at any stge in prodess for process for shitening the polymers and can give the finished products a bright bluish white glaze.Looking for ideal Optical Brightener Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Fluorescent Whitening are quality guaranteed. We are China Origin Factory of Plastive Additive. If you have any question, please feel free to contact us.