Autumn Downey on mon 12 aug 02
Hi Jeff,
We have problems with clears on Plainsman 370 - another white clay.
This recipe from Tony Hansen's website has a very low expansion and seems
not to craze, but if you use underglazes, the greens may turn brown and
reds burn out. I am testing a revision of this glaze, but don't have
results yet. In a few days...
Autumn Downey
Yellowknife, NWT
Tony Hansen clear
=================
Silica.............. 35.00 31.82%
Strontium Carbonate. 2.00 1.82%
Zinc Oxide.......... 2.00 1.82%
Spodumene........... 10.00 9.09%
Dolomite............ 11.00 10.00%
Frit 3195........... 30.00 27.27%
EPK................. 20.00 18.18%
========
110.00
CaO 0.44* 6.67%
Li2O 0.09* 0.75%
MgO 0.22* 2.40%
K2O 0.00* 0.08%
Na2O 0.11* 1.82%
ZnO 0.09* 1.98%
SrO 0.05* 1.39%
TiO2 0.00 0.08%
Al2O3 0.49 13.70%
B2O3 0.36 6.81%
P2O5 0.00 0.05%
SiO2 3.93 64.12%
Fe2O3 0.00 0.16%
Cost/kg 2.76
Si:Al 7.94
SiB:Al 8.67
Expan 5.55
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