Produce Fluorescent brightener ,OB.OB-1,CBS,CXT,for plastic,.detergent powder and dye industry also textile industry . Optical Brightener CXTProduce Fluorescent brightener ,OB.OB-1,CBS,CXT,for plastic,.detergent powder and dye industry also textile industry .Offer good quality and absolutely good price ,welcome to visit our factory . Fluorescent brightener