Developed to perform at mid-range temperatures (Cone 5-6), these glazes can be successfully used at Cone 10. Speedballﾨ Stoneware Glaze line is comprised of 24 beautiful colors including transparents, brights and mottled variations. Formulated to be friendly in application and firing, artists can expect consistent and striking results when fired as directed. All colors are dinnerware safe when used and fired as directed and lead-free. Great for kitchen and utility pieces!