Earthenware 6-Color School Pack

What is the difference between glaze and underglaze?

Underglaze fires matte and is not sealed unless a clear glaze is applied and fired on top of it. Additionally, underglaze can be similar to a paint in that the fired color is similar to the color when fired. Glazes will melt and seal the piece without the use of a clear glaze and often fire to a very different color than when applied.

Are these glazes mixable?

Yes! You can mix the glazes prior to applying to create your own custom colors, however we always recommend firing a test tile to ensure the final result is your desired shade.

What is the shelf life of Speedball glazes and underglazes?

Speedball glazes and underglazes have a shelf life of 2 years after manufacture, however when properly stored and maintained they can last much longer.

What temperature should I bisque to for Speedball glazes and underglazes?

We recommend bisquing to cone 05/04 for Speedball glazes and underglazes.