Shandong Raytop Chemical Co.Ltd is a professional manufacturer of optical brighteners. 10 years experience, Top-3 chinese factory, OEM service, this is how we keep superior quality and competitive offers for customers. Our main models cover OB, OB-1, FP-127, KCB, KSN, ER-I, ER-II, CBS-X, CXT,etc. Our products are widely used in plastics, textiles, detergents, paper making, etc.