Trusted by some of today’s most well-known and acclaimed ceramic artists, Speedball Underglazes are unmatched in vibrancy and value.

  • Available in 2oz and pint sizes across (48) bright, bold and rich colors
  • All colors have been successfully fired across a broad firing range, Cone 05-10*
  • Suitable for use on greenware or bisque
  • Deliver a softer, velvety finish when left unglazed, and intensifies in richness when covered with a clear glaze*
  • NEW FORMULATION offers the utmost brushability




* For best results, use Speedball Clear Earthenware or Stoneware Clear Glaze with Speedball Underglazes.  Speedball recommends making test tiles specific to artist's clay body and firing schedule.


Thanks to feedback from artists like you, we’ve extended this popular offering to include 12 NEW colors, coming JULY 2024! Add some of today’s most popular trend colors to your palette like Bubblegum, Lilac or Honeydew, or lean into tried and true favorites like Emerald and Burnt Orange. Each of these beautiful new additions are highly intermixable and dinnerware safe when fired as recommended.



This beautiful poster showcases 108 total test tiles, all handmade and fired in Speedball’s lab, and is printed to accurately represent results for all 36 underglaze colors at Cones 05, 6 and 10 both with and without the use of the appropriate Speedball clear glaze.  (17.875″x 23.875″)


Don’t just take our word for it! See Mid-Fire Glazes in action from some of our favorite artist partners and be sure to follow @speedball_ceramics on Instagram for more tips and tricks.