Ingredient Amount
Lithium Carbonate 5.26
Zinc Oxide 26.32
Ferro Frit 3110 48.42
silica 20.00
Add Amount
Titanium Dioxide 4.21
CMC Gum 1.05
Copper Oxide 4.74


Copper oxide version shown on top right mug.

It’s best to mix all the ingredients together dry, then add water; otherwise, all the CMC gum will clump together. Note: If adding rutile for gold crystals, drop the titanium dioxide content to 2%. Add 1% lithium carbonate increments if it over-crystallizes. 

This recipe was shared by Ryan Coppage in the June/July/August 2022 issue of Ceramics Monthly.