Silver Star Abrasive Co., Ltd. specialize in producing abrasives grain for coated abrasives, bonded abrasive and other purpose, at present, which is the biggest manufacturer of brown fused alumina micropowder, calcined brown fused alumina and iridium-coated abrasive. The company is established in 1989, now there are 550 employees, have 38 technicians among them. It subordinate six companies and a institute, namely Yuzhou Silver Star Abrasives Co., Ltd, Yuzhou Silver Star Special Purpose Abrasives Co., Ltd, Xuchang Silver Star Nanometer Technology Co., Ltd, Xinyang Silver Star abrasives Co., Ltd, Shandong Weifang Riken Silver Star Abrasives Co., Ltd, Guiyang Silver Star Abrasives Co., Ltd, National Abrasives Institute. In 2001, the company passed ISO9000, and have abrasives laboratory with State Commodity Inspection Bureau certified. At present, the company yearly manufactur 40000 tons of abrasives, of which brown fused alumia micropowder is 10000 tons, calcined brown fused alumina is