Offering artists spectacular results that fire true consistently, Speedball’s Underglazes feature 36 intense colours, that 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 colour produces a softer, velvety finish when left unglazed, and intensifies in richness when covered with a clear glaze. Trusted by some of today’s most well-known and acclaimed ceramic artists, Speedball Underglazes offer incredible quality at an unbeatable price. All colours are lead-free and dinnerware safe when used and fired as directed.