Cone 06 oxidation: Concord Grape 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): No color change. Recommended clear glaze is SW-001 Stoneware Clear.
Cone 10 reduction: Color shifts blue and lightens. Recommended clear glaze is SW-001 Stoneware Clear.