This glaze has great versatility. Bermuda (see Base Terra Sigillata) works well as an underglaze with Rob's Green. Fired to cone 11–12 in the wood-salt chamber of a noborigama, this glaze develops a very rich and depth of color.
Glazing Over Terra Sigillatas
After bisque firing, the sigillata surface is less absorbent than the clay. When dipping and pouring glazes I adjust the glaze for the correct thickness on the bisque clay and then brush a light coating of additional glaze over the areas with the sigillatas. This includes when I am using the sigillata as an underglaze and where a glaze and sigillata overlap. Additionally, where there is an overlap, a light burning terra sigillata (Base, Off White, or Warm Earth Tone) will disappear and be absorbed into the glaze, with very little noticeable effect, while the oxide-rich sigillatas can be used as underglazes.
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