Solo Cosmic Tea Dust Over Underglaze by Robbin Bowler Ermano Silva, November 13, 2025June 20, 2026 AMACO Cosmic Tea Dust on Brown Bear clay gives a fine, sparkling shimmer. Robbin Bowler used one coat over underglazes instead of clear, adding soft sparkle without darkening the colors. Fired on KY Mudworks Brown Bear to cone 5. Continue Reading