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Posts Tagged ‘Gerstley Borate’

White crackle with technique –Susan Stefanski Amann

September 24, 2012 2 comments

  The clay body is standard 239.
Underglazes are Amaco Velvets.
  Glaze is: Colemanite (Gerstley Borate) 80%
and Custer Feldspar 20%

 

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Emerald – Cone 5/6 ox –Kelly Moen

August 29, 2012 1 comment

 

 

Emerald – Cone 5/6

Gerstley Borate – 49
EPK (kaolin) – 19
Flint (silica) – 32
Chrome oxide – 2

Cobalt Oxide – 1

Bentonite 2%
This glaze has to be applied much thicker
than you would expect a glaze to go on.
Almost like a thin yogourt. The mug in the illustration was fired to cone 5.
As you get hotter the green becomes more uniform and “greener” much like the area on the edges of the handle

C/4.5.6 White China Translucent –Mimi Champlin

August 21, 2012 Leave a comment

C/4.5.6 White China Translucent

E.P.K. kaolin 20
Grolleg china clay 20
Kentucky ball clay 5
Nepheline syenite 30
Gerstley borate 5
Flint 20
——–
100
+ Bentonite 3%
Not too plastic. Fire to C/6 for translucency.

Candy Apple red ^6 –D.J. Brewer

August 1, 2012 1 comment

Candy Apple Red. Its a GREAT recipe — cone 6.
Silica — 31
Neph SY — 26
Whiting — 19
EPK — 19
Gerstley Borate — 5
Dark Red 6021 Mason Stain — 6 (or 5)

White China Translucent Body –John Goode

May 30, 2012 1 comment

White China Translucent Body

20 epk

20 grolleg

5 k1 ball clay

30 neph sye

… 5 gb

flint 20

mix in that order…

Waxy white ^10 redux –Ruth Drewery

WAXY WHITE

Custer 41;

Gerstley 12;

Dolomite 7

Talc 15;

Kaolin 5;

Silica 20.

I think this is the class recipe.

I took 1/3 cup of the liquid glaze from the bucket and added 1 teaspoon praesodium yellow mason stain.

Clear Crackle Raku –Ray Bogle

 nice glossy even clear crackle:
Gerstley Borate: 80%
 Custer Feldspar: 20%
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