 In some ash glazes extra lime was added to the ash, which may have been the case with Chinese Yue ware.A relatively high temperature of around 1170 °C is required, high enough to make the body into stoneware or (above about 1200 °C and with the right materials) porcelain.The glaze has glasslike and pooling (buildup of glaze) characteristics which puts emphasis on the surface texture of the piece being glazed.