Optical brighteners, or fluorescent whitening agents (OBA), are used to make plastics, fibers, coatings, inks, and detergents appear whiter and brighter. They are also used in substrates containing pigments or dyes to make colors appear more brilliant. We offer optical brighteners, pigments, dyes intermediates. We strictly control the product quality and supply channels, and all of our providing products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world. We have established long-term and strong business relationships with our worldwide customers in Asia, Europe, South America, and the Middle East.We are located in Hangzhou, with convenient transportation access. If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.