Ababi on mon 10 dec 01
Here are the analysis of some clays the way I have them in Insight
ALBANY SLIP......... 100.00%
CaO 0.48* 6.41%
MgO 0.31* 2.99%
K2O 0.16* 3.53%
Na2O 0.06* 0.88%
TiO2 0.02 0.44%
Al2O3 0.66 16.15%
SiO2 4.42 63.83%
Fe2O3 0.15 5.75%
L.O.I. 9.41
Si:Al 6.71
SiB:Al 6.71
Expan 6.57
BARNARD CLAY........ 100.00%
CaO 0.21* 0.62%
MgO 0.35* 0.74%
K2O 0.25* 1.24%
Na2O 0.19* 0.62%
TiO2 0.06 0.25%
Al2O3 1.54 8.28%
SiO2 16.21 51.28%
Fe2O3 4.39 36.97%
L.O.I 8.31
Si:Al 10.51
SiB:Al 10.51
Expan 7.73
Si:Al 6.71
SiB:Al 6.71
Expan 6.57
ALBERTA SLIP........ 100.00%
========
1.00
CaO 0.43* 6.31%
MgO 0.31* 3.33%
K2O 0.14* 3.35%
Na2O 0.12* 2.00%
TiO2 0.02 0.46%
Al2O3 0.54 14.58%
SiO2 4.11 64.95%
Fe2O3 0.12 5.02%
L.O.I 0.18
Si:Al 7.56
SiB:Al 7.56
Expan 6.79
REDART.............. 100.00%
==========================
CaO 0.05* 0.27%
MgO 0.42* 1.67%
K2O 0.47* 4.36%
Na2O 0.06* 0.40%
TiO2 0.15 1.15%
Al2O3 1.61 16.29%
P2O5 0.02 0.23%
SiO2 11.47 68.23%
Fe2O3 0.47 7.41%
L.O.I 4.8
Si:Al 7.11
SiB:Al 7.11
Expan 6.19
German RED CLAY....100.00% This is for Israeli potters this is the
red clay sold here (GRT)
========
CaO 0.05* 0.25%
MgO 0.32* 1.21%
K2O 0.60* 5.23%
Na2O 0.03* 0.20%
TiO2 0.14 1.06%
Al2O3 2.17 20.62%
SiO2 11.49 64.39%
Fe2O3 0.47 7.04%
L.O.I Never checked
Si:Al 5.30
SiB:Al 5.30
Expan 6.46
EARTH............... 100.00% This is the analyais of everege soil
provided by Rhodes/Hooper book. Mine, loess has probely less alumina
and more flux, but you can use this analysis as a starting point.
========
CaO 0.33* 5.19%
MgO 0.32* 3.56%
K2O 0.12* 3.20%
Na2O 0.23* 3.91%
TiO2 0.05 1.07%
Al2O3 0.55 15.65%
SiO2 3.61 60.39%
Fe2O3 0.16 7.03%
L.O.I. 20.60 in 1000C (I tested.)
Si:Al 6.55
SiB:Al 6.55
Expan 7.57
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
---------- Original Message ----------
>is barnard slip similar to albany? I have some of that.
| |
|
