The porcelain layer is uniform and flat with the thickness between 0.25 – 0.35 mm, the total defect less than 350 mm2 and no burn or shrinkage

The adherence performance is good, and silky screen is adherent with the adherence performance strength of 100N/mm2II

Acid, alkali, hot water resistance and sudden temperature change resistance;

The index of boiling water weight loss (enamel spoilage in the conditions of high temperature of 100°C for 42 days) is less than 3.0g/m2

The single-enamel standard protection current is far less than 22.5 mA/m2II