Barium carbonate as a flux, a matting and crystallizing agent and combines with certain colouring oxides to produce unique colours not easily attainable by other means. Its use is somewhat controversial since some claim that it can leach from glazes into food and drink. To provide a safe means of use, BaO is often used in fritted form. In the brick, tile, earthenware and pottery industries barium carbonate is added to clays to precipitate soluble salts (calcium sulfate and magnesium sulfate) that cause efflorescence. Barium carbonate Barium carbonate (BaCO), also known as witherite, is a chemical compound used in rat poison, bricks,
Stieff Silver years around the start of the 20th century, before starting a silver business of his own. The complete history of The Schofield Company can be found on the website. Schofield was also known as Herr-Schofield from 1905-1927. The factory was again expanded; doubled in size in 1971 to allow for the booming pewter manufacturing business. Pewter became the major business of Stieff as sales of Sterling Silver waned since the 1960s. Sterling Silver hollow ware was made at Stieff until 1999, but pewter became the star of the company in the 1970s and 1980s. Stieff was the official maker of