Richard Mahaffey on sun 20 jun 04
Joe,
The base is as follows. It is not my glaze, but one we got from F
Carlton Ball who upon getting a copy of "A Potter's Book" started
testing. Bernard Leach did some workshops at USC when Carlton was
there and I recall that he thought it was a fine glaze with American
materials.
Kaolin 10
Limestone (Whiting) 20
Flint (silica) 30
Potash feldspar 20
Nepheline Syenite 20
Colorants like 1/8 % of Cobalt Carb for a transparent light blue
have been used successfully as well as iron.
We currently have a .5% Red Iron oxide Light Celadon and a 3% dark
Celadon in use. It is best if fired to just cone 10. It goes a bit
watery above cone 10.
It is quite stiff and stays where it is put until it is too thick.
We reduce from about cone 08 or so up to at least cone 5 before we do
any oxidation (usually we do not oxidize at all.) for best results.
Let me know if you have any questions and I will try to answer them. I
will be away from my computer for a week firing an Anagama (I will have
a few pieces with the light Celadon in that firing).
Best,
Rick
Ivor and Olive Lewis on sun 20 jun 04
Dear Richard Mahaffey,
The recipe you give looks like Leech's Standard Cone 8 (Seger)
adjusted to mature at Cone 8 (Orton)
Best regards,
Ivor Lewis.
Redhill,
S. Australia.
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