Wade Blocker on tue 21 sep 99
Dear Llewellyn,
I generally use EPK (edgar plastic kaolin from
Florida) if it is specifically called for in a recipe. Otherwise I use
Putnam or Georgia kaolin, whatever I have most of. I have not found that
there is any difference in the glaze results. I have looked at the clay
analyses charts that I have and notice very small differences and the
disclaimer that the percentages given are close estimations and should be
considered only as an average.
Grolleg(English Kaolin, residual kaolin)
EPK (secondary Kaolin)
SiO2 47.7
46.0
AlO3 37.2
37.0
Na20 2.87
-
K20 "
-
Ca0 "
.09
ref. Advanced Ceramic Manual, John W.Conrad
Hope this answers your question. Mia in sunny ABQ
| |
|
