Rainy Lake Stoneware Cone 6 Clay. Medium texture plastic stoneware formulated primarily for throwing. Vitreous at cone 9, this clay is suitable for oxidation or reduction firing. Virtually sulfur free. Buff in oxidation – rich golden brown in reduction. Fires Between Cone 6-9, 2232-2300° F. Shrinkage rate is Cone 6 - 11%, Cone 9 - 12%. Best use is Throwing, Oxidation, Reduction. Color is Buff – Oxidation, Rich Golden Brown - Reduction.