Zhejiang Euchem Chemical Co.,Ltd., Which is well-known for producing and exporting Optical Brightening Agent, such as OB & OB-I & KCB & KSN & PF & PF-3 & FP & EBF, Pigment Red 122 and Pigment Violet 19 and so on for use in whitening and brightening and colorful various plastic(suah as PVC,PP,PS,PE,ABS,) Masterbath and rubble, textile dyeing, fiber, printing ink, coating and paint fields.