nature : Fe2O3 often referred to the red iron. Natural and man-made both. West said the natural red. Essentially pure iron oxide. Red powder. As production methods and the different operating conditions, and their crystal structure and physical properties vary widely, the color changes from blue to orange to light Ziguang between. Coloring and hiding power are great. Density 5-5.25. An excellent light fastness and heat-resistant properties, and atmospheric effects of resistance, resistance to dirty gas, all the alkali resistance. The concentrated acid only in the heating of gradually be dissolved. Extensive use, commonly used in construction, rubber, plastics, paints and other industries, especially with the red iron rustproof primer function can replace high-priced Hongdan paint, saving non-ferrous metals. High Ground is material, the use of precision metal equipment, such as optical glass polishing. High purity PM is the main base material used various magnetic alloy smelting and other senior steel. By ferrous sulfate or iron oxide yellow, or get a foothold iron mixed derived by high temperature sintering, or directly from the liquid medium made.