Henan Ruiqite Chemical Industry Co., Ltd.(Richite or RQT chemistry) is a Chinese professional fluorescent whitening agent manufacturer since 1990. After 30 years of research on chemical optical brightener products, with more than 20,000 clients and more than 500 formulations for different applications, RQT chemistry have won a good reputation in plastic products, paints, inks, coatings, washing, textile printing and dyeing, papermaking, etc industries…