|Borax (or Soda Ash)||5.00|
|Custer Potash Feldspar||15.00|
|OM 4 Ball Clay (or other ball clay)||20.00|
Can fire from cone 04-7 or even wider range.
I use this engobe in several ways: 1) as a white-out over something I don't like. Refire at bisque temperature and then put another surface over the top. 2) As a texturizing layer...works best put over a low-fire shiny glaze, then refire to temperature above original glossy surface so that glaze bubbles underneath. Makes a wrinkled skin on top...very interesting texture.
Picture shows Conrad Engobe over cone 7 engobe/stains which was then re-bisqued and fired in a tin-foil saggar. The Engobe picked up the fuming well.
This recipe comes from Lana Wilson's article "Lichenlike Surfaces" in the February 1990 Ceramics Monthly. Can add stains (10%). Wilson says add black stain and use under lichen surface. She says reduce nephsy if too shiny, which I don't understand because it is VERY dry matt. Slightly different recipes in different sources.
Apply by spray or brush. 1-3 coats depending on use desired. Sticks well to refire surface. Ball clay makes it look gray/brown but fires a nice dead white.