What are the materials needed to burn the glazed tiles used in ancient Chinese architecture?

Glazed tile is a special tile, legend has it that the glaze comes from the big moon, after the Tang and Song Dynasty, it is gradually used in the roof tiles. According to the traditional method of Beijing Mentougou glazed kiln, the raw material of glazed tile does not use the general clay, but uses the mixture of white horse tooth stone and dry soil, white soil. As for the surface of the color glaze is with lead, copper, sodium, potassium, manganese ...... different metals, different ratios of firing and fusion after hanging attached.

Roofing using glazed tiles, the appearance of yellow, green, blue, purple colors, very brilliant, and because of the glaze hanging water absorption is small, seepage resistance is also strong, the disadvantage is just a larger weight.