Cone 6: Purple Aster is a glossy, semi-opaque lavender glaze that breaks over texture and develops a pale violet frost; deep blue crystals melt into cascading blossoms of indigo. Cone 10: Color darkens slightly. No change to crystals. TIP: Purple Aster uses SW165 Lavender Mist as the base glaze. This glaze stable at 3 coats, even with heavy application. Crystals can create movement. Avoid having a heavy concentration of crystals near the bottom of your piece. Can be used in oxidation or reduction firings. Results may vary. The choice of clay body, thickness of application, firing process, and temperature will greatly affect the fired results. Always test your application on your clay body in your kiln environment.