Speedball Underglazes

Offering artists spectacular results that fire true consistently, Speedball’s Underglazes are unmatched in vibrancy and value. 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 green ware or bisque, each color 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, Sheffield Pottery offers Speedball Underglazes at incredible quality at an unbeatable price—on average, saving artists over 50% versus leading brands.