Enamel frits are the basic material for enamelling. at temperatures of around 1200 °c a raw material mixture comprising of quartz, feldspar, sodium borate, sodium carbonate, potash, aluminium oxide, and adhesion-forming metal oxides is... 1, show the colors with different pigments. 2, ensure bright color, stable hue and good chemical stability. 3, with strong covering and coloring power. steel plate transparent frit usage introduction it’s for coloring of enamel surface, with bright color and stable hue. firing temperature should be lower than under layer. 2, smooth enamel surface and high glossiness(for glossy frit), good acid resistance. cast iron enamel frit usage introduction cast iron body need pretreatments as 4, can be both single used or mixed with other frit according to firing temperature. direct-on black frit usage introduction: it’s used on low carbon cold rolled steel plate and can get very strong adhesion.