... is “Black Pottery Culture”. Black potteryOur black pottery uses natural and original ecological silt formed about 1,200,000 years ... processes including mud making,molding,manual carving,natural drying in the shade and burning in strong reducing flame.The process of making ... materials contain SiO2,Al2O3,Fe2O3,MgO,CaO,K2O and other natural substances.They are healthy and environment-friendly high-grade ...