... ) 95%-98% from Kevin Ren,Hebei Yuhuan Chemical Co.,ltd Precipitated Barium Sulfate(BaSO4) 95%-98% from Kevin Ren ... ,Hebei Yuhuan Chemical Co.,ltd 1. The Introduction of Hebei Yuhuan Chemical Co.,ltdHebei ... Yuhuan Chemical Co.,Ltd is founded in 1975 and the largest lithopone production ... 95%-98% from Kevin Ren,Hebei Yuhuan Chemical Co.,ltd