Brad Sondahl on tue 14 jan 97
Previously I've developed my glazes through an intuitive/hybridization
process. Lately I've been trying out Glazechem software, and it's very
nice for sorting out recipes into unity formulas and producing results
as follow:
Alumina:Silica ratio is 1.00:8.06
Neutral:Acid ratio is 1.00:8.39
Alk:Neut:Acid ratio is 1.00:0.25:2.11
Expansion: 78.6 x 10e-7 per degree C
However this information is not useful to me, since I don't know the
acceptable range. Even with unity formulas, I have to keep a card with
stoneware limit ranges on it to make the unity formula of a recipe
useful. (software developers take note: add limit formulas into program)
My 20 year old texts (2 by Rhodes, one by Glenn Nelson) are not helpful.
I would appreciate some rules of thumb as to Alumina-Silica ratios,
etc., or direction to a good glaze text book.
Thanks, Brad Sondahl, Nezperce Idaho
bsondahl@camasnet.com
Bruce Michaels on wed 15 jan 97
On Tue, 14 Jan 1997, Brad Sondahl wrote:
> ----------------------------Original message----------------------------
> Previously I've developed my glazes through an intuitive/hybridization >
>process. Lately I've been trying out Glazechem software, and it's very >
>stoneware limit ranges on it to make the unity formula of a recipe >
I'am considering writing glaze software and I am curious as to what
limits are you talking about, points where the ratio of silica /allumun
is so low the glaze doesn't form or where it forms and is not a feasable
glaze?
Bruce Michaels
Western New York State
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