Ingredient Amount
OM4 Ball Clay 10.00
Water 20.00
Add Amount
Sodium Silicate 22.70


This recipe was shared by Rebecca Zweibel in the March/April 2018 issue of Pottery Making Illustrated.
Water and clay measurements are in pounds.

Add: AMACO Velvet underglaze to taste.

Mix all the ingredients together and let the mixture settle in a clear jar overnight. Siphon off the middle layer; this is the terra sigillata. Add 1–3 tablespoons of AMACO Velvet underglaze to attain the colors you want.