Cone 06 oxidation (large photo): Silver Grey will fire matte without addition of a clear glaze. To intensify color or for use on dinnerware, apply clear or matte clear glaze. Cone 6 oxidation (small photo – left): Color concentration occurs. Recommended clear glaze is SW-001 Stoneware Clear. Cone 10 reduction (small image – right): Color fades. Recommended clear glaze is SW-001 Stoneware Clear. Click here for additional details: