What is the general material of hotel porcelain tableware?

The porcelain tableware in the hotel is typical porcelain. Its material is porcelain fired by porcelain clay at high temperature and porcelain fired by glazed porcelain tires. Its essential feature is non-metallic inorganic matter, just like porcelain. Other hotel porcelain is bone porcelain, which is made by adding animal ashes such as cattle to porcelain clay and then firing it. thank you