Russel Fouts on sun 16 feb 03
Rick,
>>
25 Kaolin (usually EPK kaolin, Edgar Plastic Kaolin to be exact)
25 Ball clay (usually Kentucky old Mine #4)
(Those two provided the clay and enough plasticity to make the
clay workable.)
25 Silica
25 Feldspar
(The feldspar to impart a degree of translucense, and both to
provide the non- plastic material necessary in a clay body)
(This formula makes an excellent slip for coloring and use in
Hakame, or Mishima, or under a raku clear.)
>>
After this, Enzo shared with me another 4 part receipe:
25% Flour
25% Sugar
25% Butter
25% Egg
Yummmmmmy
The actual receipe:
Ingrédients :
4 oeufs
200 g sucre semoule
200 g farine
200 g beurre mou
2 cuillères à soupe de rhum ou de cognac
1 sachet de levure chimique
sel
Temps de préparation : 15 mn
Cuisson : 40 mn
Préparation
Séparez les blancs et les jaunes, les garder. Tamisez la farine.
Mélangez le beurre avec le sucre, travaillez la pâte jusqu'à qu'elle
blanchisse.
Ajoutez les jaunes d'oeufs et la farine. Mélangez et battez les blancs
en neige. Incorporez les blancs, la levure et le rhum. Salez. Mélangez
le tout en soulevant la pâte de bas en haut. Versez dans un moule de 24
cm de diamètre. Mettez-le au four thermostat 7 pendant 40 mn.
Ru (Getting hungry)
--
Russel Fouts
Mes Potes & Mes Pots
Brussels, Belgium
Tel: +32 2 223 02 75
Mobile: +32 476 55 38 75
Http://www.mypots.com
Home of "The Potters Portal"
Over 1800 Pottery Links!
Updated frequently
"Is the Hokey Pokey really what it's all about?"
Russel Fouts on sun 16 feb 03
I think Hank mentioned it in a fascinating discussion a couple of years
ago that the original oriental porcelain isn't really anything like the
feldspar based porcelains used in the west.
I guess if you really wanted to use "true" porcelain, you'd have to
start from the Petunze stone.
Russel (stirring the pot ;-)
--
Russel Fouts
Mes Potes & Mes Pots
Brussels, Belgium
Tel: +32 2 223 02 75
Mobile: +32 476 55 38 75
Http://www.mypots.com
Home of "The Potters Portal"
Over 1800 Pottery Links!
Updated frequently
"Is the Hokey Pokey really what it's all about?"
Mark Heimann on sun 16 feb 03
Right on, Craig.
Diminish the semantics, I vote for Tree Frog.
Yer pal
Markmann
Estacada, OR
----- Original Message -----
From: "Craig Martell"
To:
Sent: Sunday, February 16, 2003 9:59 AM
Subject: Re: True Porcelain
> Hi:
>
> Perhaps the idea of "true porcelain" is languishing in the archaic bin,
and
> maybe that's a good place for a lot of definitions we struggle with. If
> there is indeed a definition for the real stuff, who has it, and by what
> authority? Maybe it's best if we just deal with the characteristics of
> claybody types and firing ranges and conditions and leave it at
> that. Endless debates eat up time that could be spent working on your
> undefined ware type or enjoying a pint of Tree Frog beer.
>
> regards, Craig Martell Hopewell, Oregon
>
>
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Craig Martell on sun 16 feb 03
Hi:
Perhaps the idea of "true porcelain" is languishing in the archaic bin, and
maybe that's a good place for a lot of definitions we struggle with. If
there is indeed a definition for the real stuff, who has it, and by what
authority? Maybe it's best if we just deal with the characteristics of
claybody types and firing ranges and conditions and leave it at
that. Endless debates eat up time that could be spent working on your
undefined ware type or enjoying a pint of Tree Frog beer.
regards, Craig Martell Hopewell, Oregon
Fredrick Paget on mon 17 feb 03
Last summer I was fortunate enough to spend a few weeks in China at the
Jingdezhen Sanbao Ceramic Institute which is located in a narrow valley
several miles out in the country. This valley is where the china stone
ingredient used in making the true porcelain comes from and they are still
mining and pulverizing it there.
China stone is a sort of rock that is pale gray and fine grained and when
it comes from the ground. It is hard rock. They pulverize it in water
powered hammer mills in the Sanbao valley, reducing it to a powder and
water levigating it to a white sludge that is made into a white brick
called petuntse. These bricks of unfired pulverized stone go to Jingdezhen
where in a big clay factory they are mixed with kaolin and ballmilled. The
slip is filter pressed and the filter cake goes into a big pug mill. We
visited this factory. As I understood it petuntse is 40 percent of the
final porcelain of today.
The china stone rock looks like feldspar or something close chemically
but it has all the ingredients needed to make a porcelain by its self. From
what I heard said it was used alone in antiquity but did not have enough
"bone" in it to stand up in the kiln. Someone found that by adding a lot of
kaolin clay to it they would "put bone in it" and make it stand up to
firing.
We also visited Gaolin mountain where in the old days they mined kaolin.
The mines are exhausted now and the mountain is a national park. The kaolin
was found in seams in the parent rock that are sort of caves or crevices in
the mined out area. The clay was carried down from the mountain top mining
area on coolie back along a steep trail to a high valley where the
levigating ponds are located.
Now a days the kaolin comes from somewhere else.
There seem to be several different porcelains in use there now. A sort of
pink mix that fires out white was used for making the 12 foot high pots in
one factory. They were throwing rings about 2 feet high using two men as a
team seated on opposite sides of the wheel whose motor, etc., was below
ground so the wheel head was at ground level. The master did the actual
throwing but his helper grasped his wrists so they could exert more force
on the clay as a team. These rings are dried outdoors until they are ready
to be trimmed and stacked up to make the huge pots with inch thick walls.
There are 15 foot tall lamp pillars in the porcelain market that are made
of porcelain probably by the same method.
At the institute we had a whiter porcelain body. It was a lot like the
Southern Ice that we just got here in USA - imported from Australia. It is
thirsty for water so it is very hard to throw but the Chinese have masters
who can throw very large pots from it in one sitting. I saw one fellow
center at least 100 pounds of clay by adding it in 10 pound increments
until the whole mass was centered and then throw a 3 foot diameter bowl
from it .
Enough for now.
Fred Paget
From Fred Paget, Marin County, California, USA
deborah jorna on tue 18 feb 03
we were fortunate to have the potters of jingdezhen come to nova scotia, =
their techniques can be seen in the images part of the web site
http://fortress.uccb.ns.ca/archaeology/china/j@l.htm
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