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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 greenware or bisque, each color produces a softer, velvety finish when left unglazed, and intensifies in richness when covered with a clear glaze*. Speedball Underglazes offer incredible quality at an unbeatable price—on average, saving artists over 50% versus leading brands.
All colors are dinnerware safe when used and fired as directed, are lead-free and carry the AP Seal.