SM-3 Marble is a pale gray satin glaze, just a whisper of color like the polished marble it's inspired by. Glaze fire to Cone 5-6. Due to variations in raw materials used during manufacturing, we recommend firing glazed test tiles before using each new batch number of glaze. AMACO Satin Mattes break slightly over edges and texture and boast a soft satin feel. These glazes are formulated to be 100% mixable (except for Orange and Red, which have a different base.) Use Clear Satin to lighten colour tones, Satin Black to create shades, and Satin White to create tints. Cone 5/6 Mixable Dinnerware safe