Enamel is a metal body coated with a layer of porcelain glaze, after melting to obtain the product. The enamel has excellent opacity and a certain degree of acid resistance, alkali resistance, heat resistance and wear resistance, so that it can protect and beautify the metal. The glaze must have opacification properties to make the glaze opaque. White glaze in particular must have a stronger opacification property. For this reason, emulsion must be added to the glaze. Titanium dioxide is the strongest emulsion in enamel. The product coated with titanium white enamel has smooth surface, acid resistance and good color and luster. Therefore, a large amount of tio2 is used in the enamel industry..