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1225 Lasalle #1005

Minneapolis, MN  55403 

Studio address:

435 Main St.  (not a mail address)

Clearwater, MN  55320



Glaze, Slip, and Clay Composition

Stoneware Clay Body Recipe

Hawthorne 20 mesh screened (Missouri fireclay): 100 lbs
Old Mine #4 Ball Clay: 100 lbs
Kentucky Stone: 50 lbs
Hawthorne Bond Clay (35 mesh): 50 lbs
Custer Feldspar: 45 lbs
Virginia Kyanite (100 mesh): 40 lbs
firebrick grog (48 mesh): 40 lbs

I also sometimes add acetic acid to the water that is used in making this clay body. The amount of acid added to the water is calculated at 5% acidity (about 1 cup to 1 gallon of water used in the clay).


Base Ash Glaze - % by weight - C/9-10

50% Red Art, Earthenware Clay
50% mixed, unwashed hardwood ash

1% Cobalt carbonate (grey-blue-green)
3% Nickel oxide (yellow-brown mottled surface)
1% Chrome, 0.5% Cobalt carbonate (black thin, greenish/black thick)

White ash glaze - C/9-10

Mixed, unwashed hardwood ash: 300
OM #4 ball clay: 300
Dolomite: 250
Neph syanite: 100

Slip for all occasion - C/9-10

Neph syanite: 200
EPK kaolin: 200
Flint: 200
OM #4 ball clay: 400
For white color, zircopax: 60

Robert Briscoe’s White Slip for Bisque - C/9-10

Kona feldspar (soda): 2800
OM #4 ball clay: 1600
Georgia kaolin: 1600 (no substitution)
Flint: 1600
Borax: 400
For white color, zircopax: 400

Celadon (clear glaze) - C/9-10 (from John Glick)

(used as stain flux)

Kona feldspar: 700 (soda feldspar)
Whiting: 50
Gerstley borate: 100
Flint: 150
Bone ash: 50
Zinc oxide: 50 (best if calcined)
0.5% by weight Vee gum suspender

Overglaze Stains

2 parts iron oxide
1 parts rutile
6 parts any clear glaze

10 parts copper carbonate
1 part cobalt carbonate
15 parts any clear glaze

1 part copper carbonate
15 parts any clear glaze

Mason Stain 6600 added to
Clear glaze to desired intensity