We are a leading maufacture of Yellow ochre SY-311 . It is a natural mineral consisting of silica and clay owing its color to an iron oxyhydroxide mineral, goethite. It is found throughout the world, in many shades, in hues from yellow to brown. FeO(OH) nH2O , is a hydrated iron hydroxide (limonite) also called gold ochre Features: Thermal resistan