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Studio & Gallery [
Learn
about porcelain ]

David Beumée
Earth Alchemy Pottery
(above)
upstairs gallery
- (below) exterior and studio
What
is Porcelain?
As
white as jade, as thin as paper,
as bright as a mirror, as sound as a bell.
Porcelain is
dense, vitrified, white and translucent ceramic ware that I
consider to be a refined cousin of stoneware. High fire
stoneware and porcelain wares are fired to nearly 2400 degrees
Fahrenheit, but in contrast to stoneware, a porcelain clay body
is made of only fine and pure materials and is very simple in
composition, consisting of clay, (kaolin), silica, flux
(feldspar), and a plasticizer. At top temperature
porcelain is very close to becoming glass. This is because a
porcelain clay body
consists of only very finely ground materials that are therefore
able to melt in a very complete and homogenous way. Glazes are
also a form of stiff glass, and porcelain is unique in that the
body and glaze mature together at 2400 degrees to create a thick
body-glaze layer that can give the whole piece an important
strength. The whiter
the kaolin used to make the clay body, the greater the amount of
clarity the glazes can achieve when reflected against the
whitest possible background. The name kaolin comes from the
Chinese word kao ling, or high ridge, where the original deposit
of white burning clay was discovered near
Jingdezhen, the center of porcelain production in
China.
Often I hear people
recoil at the daunting challenge of using porcelain on the
potters’ wheel, and it is true there is a point of diminishing
returns when trying to cajole porcelain clay into tall forms on
the wheel in comparison to using far more workable stoneware
clays. With testing,
diligence, a willingness to make a clay body that works for your
own individual needs and decades of experience, all barriers can
be overcome. Mastering porcelain clay is the work of a lifetime.
Nothing else can or will suffice.
The name
porcelain was coined by Marco Polo in the 13th century from
porcelino, the name of a translucent cowrie shell
that looked like a little pig, or porcelino. He likened
Chinese porcelain to this translucent white shell. You can see
and feel the fine white smoothness of the porcelain clay body on
the foot or inside of a lid of one of my pieces. Enjoy.
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