will edwards on fri 18 may 01
Below is a version of 439 that I had toyed with. I took the GB average an=
d
replaced it one to one and then calculated a clay in it to help in suspen=
sion
and some silica to help with the melt. 010 cone is about mid-way of the l=
imits
I use and 04 drops it down but still within the parameters I use. Gerstle=
y
(typlical analysis) was used as well and the results were astoundingly cl=
ose.
I used MATRIX to help me with this one. =
Daven's pottery supply in Atlanta GA is my source for the F439. I don't k=
now
who else might be carrying it? Let me know if any of you try this...
William Edwards
RAKU 439 =
----------------------------------------------------
Formula Weight% Recipe
----------------------------------------------------
KNO 0.1687 5.45% Frit 439 70.00
CaO 0.6718 19.20% OM-4 Ball Clay 20.00
MgO 0.1596 3.28% Silica 10.00
Al2O3 0.1678 8.71% =
B2O3 0.7372 26.14% =
SiO2 1.1999 36.75% =
TiO2 0.0114 0.46% =
K2O 0.0072 0.35% =
Na2O 0.1614 5.10% =
Al:Si 7.1501 =
Expan. 9.7611 =
ST 271.734 =
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william schran on sat 19 may 01
Will - I'll give your frit 439 recipe a try in addition to the one I
posted for raku. I get mine from Pine Ridge Pottery (Campbell's Clay)
here in Virginia. Their site is http://www.claysupply.com
Bill
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