Hongyuan Chemical Co., Ltd. We are a private-run enterprise that possesses the largest scale and the most varieties of series calcium carbonate product. There are two series more than ten varieties of light calcium carbonate and activated calcium carbonate. Annual output reaches to 50,000 tons. To serve rubber, plastic, chemical, dope, oil paint, paper mill, pharmacy, foodstuff, printing ink, cable industry, etc. There are plenty of best quality and pure limestone around our factory, those are best materials to producing CaCo3 series.