Virginia Scotchie on sat 23 sep 00
Hi All,
We have a fantastic new salt kiln designed and built by my grad students =
and Dave Alban. I would like to get info on once firing glazed greenware =
in salt. We have fired work that is green with slips but have had trouble =
with green ware cracking after it is glazed.
Any receipes for clay and glazes that work using the once fired method =
would be greatly appreciated!
Virginia
Snail Scott on sat 23 sep 00
At 04:09 PM 9/23/00 -0400, you wrote:
>Hi All,
>
>We have a fantastic new salt kiln designed and built by my grad students
and Dave Alban. I would like to get info on once firing glazed greenware in
salt. We have fired work that is green with slips but have had trouble with
green ware cracking after it is glazed.
Try glazing while still slightly leather-hard. The work absorbs less
glaze-water. Rims and other skinny areas are especially prone to expansion
from water absorption. Are you painting the slips on, but dipping the glazes?
This might be why one works, but not the other.
-Snail
Eydie DeVincenzi on sun 24 sep 00
Virginia:
>.... info on once firing glazed greenware in salt. We have fired work th=
at
is green with slips but have had trouble with green ware cracking after i=
t
is glazed.
Any receipes for clay and glazes that work using the once fired method
would be greatly appreciated!
<
The first and only time I've participated in a salt firing was at Penland=
this summer with Don Rietz and he did the most OUTRAGEOUS thing - he had =
us
fire WET pieces... Out of this massive gas kiln (packed tightly, includi=
ng
pieces IN THE FLUE), came beautiful unbroken salt-fired pieces.
We started loading on Tuesday at noon. We watched him work very very
carefully with the 6 propane burners, increasing temperature very slowly
through the nights, opening and closing the flue at critical times. The=
whole process was documented. We unloaded the kiln on Saturday afternoo=
n.
=
What I learned was that I have a lot to learn about gas-fired kilns and
that it takes incredible patience, a good sense of smell and the ability =
to
detect subtle heat-changes to do a good firing. The salting part seems
less critical as compared to the skill it seems to take getting the kiln =
to
the right temperature in the first place. =
Eydie DeVincenzi
Paul Taylor on tue 26 sep 00
Dear Virginia
The secret to raw glaze is Timing the glazing, and glazing the inside
of the pot at a different time to the out side . I used to glaze the out
side first.
It depends on your clay and slip glazes which contain 5% bentonite or 10
% ball clay. As long as they contain these they can be timed to fit any
thing.
Regards Paul Taylor
----------
>From: Virginia Scotchie
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Once firing in Salt
>Date: Sat, Sep 23, 2000, 9:09 pm
>
>Hi All,
> I would like to get info on once firing glazed greenware in
>salt. We have fired work that is green with slips but have had trouble with
>green ware cracking after it is glazed.
>Any receipes for clay and glazes that work using the once fired method
>would be greatly appreciated!
>
>Virginia
>
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