AMACO CO-03 Event HorizonCosmos 03 Event Horizon is a dark, fluid glaze shifting between large crystals with blue and violet highlights at cone 5 and a bright gold surface at cone 6. Apply to: Cone 04 Bisqueware Number of coats: 4 coats For best results, leave the inside or back of the form unglazed. Can be fired in a normal medium speed firing with no special cooling schedule required. To take this glaze to the next level, use a controlled cooling schedule for increased