Mother of Pearl is a high end finishing technique meant for artists. To use, apply one coat over fired glazed pieces, and re-fire to cone 020.Check out our Duncan Tip Sheets to get the most out of your Duncan Glazes! This product is manufactured by Duncan Enterprises. Bisque Imports proudly manufactures and distributes a variety of products. For the most up to date product information, vendor news, and best practices, click here.