Favorite Glaze Recipe

I have said in the past that I would post some glaze recipes, so I guess I'd better get on it.   Seeing as it's St. Patrick's Day, I think I will share this green glaze recipe. This is for my fellow potter friends.  This glaze I call "Chun Green".  I got the base recipe from a book titled "The Ceramic Glaze Handbook" by Mark Burleson and added 2% copper carbonate.   This is a cone 5-6 glaze, though it likely can go higher, as I found out by accident one day. (Another story)  It is a very reliable glaze, does not run, and I use it a lot.  Here is the recipe:

Chun Clear
cone 5-6 Oxidation                 100 Grams

Soda Feldspar (F4)...........................38.0
Whiting...................................................14.0
Zinc oxide..............................................12.0
Ball clay (OM4)....................................6.0
Silica.........................................................30.0
add
Copper Carbonate................................2.0
Bentonite.................................................2.0

I add 2% Bentonite to keep it in suppension better.  Otherwise it can settle into a hard mass at the bottom when not used for a while. 
You can add less Copper Carb for a lighter green or add other oxides or stains to your liking.  I also use this base glaze as my clear glaze.  I usually mix up 50 times the 100 gram batch.  It makes a couple gallons, I think.  When dry on the bisque it is quite powdery.  Not very forgiving of over laps or touch ups.  It usually shows.  Gets darker where thicker.  Works well over underglazes.  Excellent on functional ware.  Food safe.

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