All colors are safe for dinnerware if used and fired as directed, are lead-free and carry the AP Seal. For best results, use Speedball Clear Earthenware or Stoneware Clear Glaze with Speedball Underglazes. Speedball recommends making test tiles to match the artist’s clay body and firing schedule. <\/p>\n","protected":false},"excerpt":{"rendered":"
Speedball’s Underglazes offer artists spectacular results that fire consistently across most of the color spectrum and are unmatched in vibrancy and value. Originally formulated to perform across a wide firing range, 05\u20136, Speedball\u2019s 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 becomes more intense in richness when covered with a transparent glaze. For best results, use Speedball Clear Earthenware or Stoneware Clear Glaze with Speedball Underglazes. Speedball recommends making test tiles that match the artist\u2019s clay body and firing schedule. <\/p>\n