Glaze is a glass-like coating on earthenware which is produced from its components during the firing process. From a physical and chemical perspective it is molten silicate in a vitreous state. The glaze enhances the product's aesthetic value, mechanical strength, chemical resistance and, in the case of porous earthenware, renders the surface water-tight. Because of the multitude of areas of application there is no single classification system for glazes. We group our glazes based on a variety of criteria, including composition, firing temperature, field of use and manufacturer.