AMACO Opalescent glazes may be used over any color clay body, but they will develop their greatest opalescence and most interesting textures when applied over red firing clay bodies. Most of the Opalescent glazes have a high gloss with an iridescence similar to mother-of-pearl. Best results are achieved with three or four applications of glaze. On textured ware, the glaze flows thin on relief and thick in incised areas, giving an added dimension on the surface. AMACO Opalescent glazes should be fired to Cone 05 - 03.