Ababi on sun 7 oct 01
About porcelain/claybodies.
I find VC's book very helpful for different & interesting claybodies in
different cones.
There are some claybodies in Behrens's too but I did not try any, if to
judge folowing the great glazes, I tried from his book, I can redemand
these
claybodies in "covered eyes". ( How does it sound in English?)
Tom Buck had formulated for me a ^6 PORCELANEOUS BODY, according to the
materials I could buy at my supplier.The main problem was that he
(supplier) keeps only English Kaolin CC31 which is beautifully white
but not plastic.
If I understand correctly Tom has oppose the kaolin and the ball clay.
This way there was a little more shrinkage, but there was a better
plasticity.
I will write down the materials& there analysis.
Lately I started to buy EPK and Kaolin D' Arvor.that are plastic kaolin.
When I got the first 1 K"g of the French Kaolin I made a batch , using
it instead of the CC31.
The plasticity improved.
I used Tom's porcelain mainly for my Crystalline glazes. You cannot buy
here, in this lovely peacefully corner of the East Mediterranean, ^6
porcelain.
Eventually it was good because it led me to make or change claybodies
for special reasons. I cannot explain why, but the claybody I make
myself is always more expensive than the equivalent ready made.
This is the end of my long chat and now to the businessAbabi's ^6
Porcelianous by Tom Buck
===================================
BALL CLAY (AK)...... 48.00 47.06%
ENGLISH KAOLIN CC31. 33.00 32.35%
NEPHELINE SYENITE... 14.00 13.73%
ALUMINA HYDRATE..... 5.00 4.90%
BENTONITE........... 2.00 1.96%
========
102.00
CaO 0.04* 0.17%
MgO 0.37* 1.24%
K2O 0.27* 2.06%
Na2O 0.32* 1.65%
TiO2 0.01 0.09%
Al2O3 4.58 38.33%
SiO2 11.25 55.55%
Fe2O3 0.07 0.92%
Si:Al 2.46
SiB:Al 2.46
Expan 5.86
BALL CLAY (AK)...... 1.00 100.00%
========
1.00
CaO 0.06* 0.23%
MgO 0.89* 2.53%
K2O 0.05* 0.34%
TiO2 0.02 0.11%
Al2O3 5.24 37.66%
SiO2 13.70 57.98%
Fe2O3 0.10 1.15%
Si:Al 2.61
SiB:Al 2.61
Expan 4.78
What do we get here. Not totaly white porcelain (^6)
You may see it at
http://members4.clubphoto.com/ababi306910/186013/
The first line. I tried it also in regular firing, it is kind of
"princess"among the clay bodies.
In some of the letters were offered porcilains based on 4/25
25 kaolin
25 ball clay
25 feldspar
25 quarz/flint.
In ^6 it is not stong enough, for sure not plastic.
In the article of VC, there are some claybodies too
http://www.studiopotter.org/articles/art0009.htm
Ababi Sharon
Kibbutz Shoval- Israel
officially Glaze addict
sharon@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
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