Steinzeug

Steinzeug, or stoneware in English, is a vitreous ceramic ware produced by firing a clay body at relatively high temperature until it vitrifies. The resulting material is dense and non-porous, and it can be used glazed or unglazed. Common finishes include salt glaze, tin glaze, and various lead glazes. Firing temperatures typically range from about 1,150 to 1,300 degrees Celsius. Stoneware is harder and more durable than earthenware and is not as translucent as porcelain, qualities that make it suitable for everyday wares such as jugs, bowls, and crocks.

Historically, stoneware has origins in East Asia and the Near East, where high-fired ceramic wares were developed in antiquity. In Europe, stoneware became widespread from the late medieval period onward. European centers such as Westerwald, Raeren, and Lippe produced large quantities of salt-glazed stoneware, often decorated with cobalt-blue underglaze. This combination of practical strength and decorative surfaces contributed to its popularity for everyday use and for special wares.

In modern production, Steinzeug denotes stoneware made from a stoneware clay and fired to high temperatures, resulting in a durable, watertight body. Contemporary stoneware is widely used for tableware and cookware, offering a balance of resilience, thermal stability, and versatility. It remains a major category in both artisanal pottery and industrial ceramics.