Shandong Raytop Chemical Co.,Ltd established in 2006.We are optical brightener manufacturers and factory. Now days we has three production bases,with total area of 120,000 square meters, 6 workshops and more than 260 employees. We are the most professional optical brightener suppliers and manufacturers in China.We have a optical brightener factory,special advantage products optical brightener for plastic,optical brightens for textile, optical brightener for paper making, optical brightener for detergent.And all kinds of master batches are available.