Speedball 16-Ounce Underglaze Royal Purple

Offering artists spectacular results that fire true consistently, Speedball’s Underglazes are unmatched in vibrancy. Originally formulated to perform in a wide firing range, 05 - 6, Speedball’s Underglazes have been successfully fired at Cone 10. Suitable for use on greenware or bisque, each color produces a softer, velvety finish when left unglazed, and intensifies in richness when covered with a clear glaze.