We are one of the leading manufacturers of a comprehensive range of quality optical brightening agents,Fluorescent Whitening Agent,for various requirements of plastics, textile, paper industries. Available at competitive prices, our optical brightening agent are suitable for different applications and in various temperature conditions. We welcome and value your comments, questions and suggestions about our company and our products. Should you need additional information, please feel free to contact us windy886655(at)gmail.com. Optical Brightening agent and its applications are listed as below: Optical Brighteners and applications are listed as below: For Woven sacks: OB-1 KCB PF-3 For PVC pipes & fittings : KB 510 530127 PF OP-1 OB-1 For film blowing: OB PF-3 KCB PF-4 127 For chemical fiber :OB-1 OB-1T KSN ER For master batch :OB-1 OB-1T KSN KCB OB For cotton :4BK 4BK-A For Textile: ER-I,ER-II,ER-III,CBS-X