Lead-glazed earthenware

Lead-glazed earthenware is one of the traditional types of glazed earthenware, which coat the ceramic body and render it impervious to liquids, as terracotta itself is not. The lead glaze is shiny and transparent after firing. Three other traditional techniques are tin-glazed earthenware, which coats the ware with an opaque white glaze suited for colored designs, salt-glazed earthenware such as stoneware, and the feldspathic glazes of Asian porcelain. Modern materials technology has invented new vitreous glazes that do not fall into these traditional categories.