Alisa and Claus Clausen on mon 3 apr 00
------------------
Dear Arnold,
Of course as explicit instructions as possible on how to fire the kiln are
important. Also about placement of the kiln and being there for when the =
kiln
should shut off for safety reasons.
But, firing the kiln is one part, and what is being fired is another.
Below what Cindy writes to Helvi is a problem I saw in our community studio.
The person designated to fire the kilns was quite terratorial about the kiln
loadings
and firings. This person had done =22millions of firings=22, but was still=
a
hobbyist with
low fire knowledge. When the studio broadened and had stoneware, the
bisques were being done too high for the clay. It was literally putting the
literature
from the supplier under a nose to make a believer.
I think it is important to note for teachers the bisquing temps. (and =
obviously
the
glaze range) of different bodies. If they do not know the information
beforehand,
they should be encouraged to investigate that for themselves (supplier =
info.)
with
every new type of clay being fired. Clay is not clay is not clay. Worse =
than
a too
high bisque is the lava meltdown of terracotta at stoneware temps.
Kiln instructions might also include a section on firing different bodies.
Like sewing machines manuals have instructions and tips for different
types of fabric.
Best regards,
Alisa in Denmark
Fra: Cindy Strnad =3Cearthenv=40gwtc.net=3E
Til: CLAYART=40LSV.UKY.EDU =3CCLAYART=40LSV.UKY.EDU=3E
Dato: 1. april 2000 21:26
Emne: Re: question on bisque firing
=3E----------------------------Original message----------------------------
=3EHelvi,
=3E
=3EMid to high fire work should be bisqued at a lower temp and glazed at a
=3Ehigher temp. Low-fired work is usually bisqued at a higher temperature =
than
=3Ethe glaze firing.
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