Longkou Windstar Chemical Co., Ltd. was founded in 2004. We are a professional manufacturer of ultramarine blue. High-grade covers an area of 860,000 square feet. We have the annual production capacity of 3,000 tons of ultramarine blue. Our ultramarine is non-toxic, high tinting strength, vividness, high dispersion and batch quality stability. It is ideal for application in fields of plastic, rubber, paint, ink, spray coating, art painting and cosmetic etc. Our products have achieved approval of SGS, and met the need of the environmental requirements of non-toxic. Our products are sold worldwide to the United States, Europe, Middle East, Southeast Asia and Africa etc.