Ingredients

Ingredient Amount
Borax 3.88
Gerstley Borate 46.51
Magnesium Carbonate 31.01
EPK Kaolin 18.60

Instructions

When fired to cone 04, it has a glassy bead-like effect. When applied thinly and fired to cone 06, the glaze crawls into small, dry platelets, creating a lichen look. If thickly applied, the platelets are larger and the distance between greater, similar to a dry river bottom.

Published in "Accentuating Form with Glaze" by Mary Fox, in the January/February 2017 issue of Pottery Making Illustrated. Originally from Mark Messenger's notes, Ceramics Monthly May 1996.

 
For White: add 5.43% Zircopax.

For Green: add 1–5% Copper Carbonate

For Blue/Purple: add 1–5% Cobalt Carbonate