elise pincu on wed 5 apr 00
Hello from Miami again,
Thanks for helping me and my friend with these
answers. Another question:
If you take work out of a kiln while it is too hot to
touch with the bare hands, will it damage the electric
kiln?
Thanks for the answer! The more the merrier: we can
take an average of who think it does, and who doesn't
think it damages the kiln.
ELise in Miami
=====
Pincu Pottery
Funktional Ceramic Art
http://www.basic-learning.com/pincupottery/
__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com
NakedClay@aol.com on thu 6 apr 00
In a message dated 4/5/00 1:02:58 PM Pacific Daylight Time,
pincupot@yahoo.com writes:
> f you take work out of a kiln while it is too hot to
> touch with the bare hands, will it damage the electric
> kiln?
--------------------------------
OUCH!
Perhaps I fail to understand this one--when is it necessary to extract
extremely hot items, from an electric kiln, to begin with?
My guess is that the damage will be greater to one's hands and eyes (wearing
protective gloves, and eye covering, I assume), than to the kiln. Be sure the
kiln is switched "off" before unloading hot items from it. This is especially
necessary, if you use metal tongs to extract hot pottery from the kiln. Wear
appropriate hand and eye protection, too.
That said, I hope you'll enlighten us of your unusual technique. Perhaps
there's more than meets the eye here.
Best wishes!
Milton NakedClay@AOL.COM
Cindy Strnad on fri 7 apr 00
Elise,
Taking work out of the kiln hot is a mildly controversial subject. First,
your question: Does it damage the kiln?
Yes, no, and it depends. It depends upon how hot and how often you want to
change the elements and how long the kiln is open. Basically, the shock of
thermal change is hard on the elements. It shouldn't be a problem for any of
the rest of the kiln components.
Second, does it damage the work? Again, it depends. Raku, of course, must be
removed hot-hot-hot. Some clays and/or forms cannot stand this kind of
thermal shock and will break. Most things can safely be removed at around
6-700 degrees F. (using tongs), but watch where you set them! I've heard it
said that this practice can damage glazes by causing them to craze, but it's
my opinion that if the glaze crazes when treated roughly, it needs to be
reformulated because it will eventually craze anyhow.
All that said, I believe that in nearly all cases, it's best to practice a
degree of patience and allow the kiln to cool naturally. Safer, easier on
the kiln, less likely to drop the pots or burn the surface you set them on,
etc.
Cindy Strnad
earthenv@gwtc.net
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
friedlover on sat 8 apr 00
Opening it too fast is connected with elements cooling too fast, so yes,
over time, elements will pop out, and this can damage the kiln.
----- Original Message -----
From: elise pincu
To:
Sent: Wednesday, April 05, 2000 1:01 PM
Subject: electric kiln damage?
> ----------------------------Original message----------------------------
> Hello from Miami again,
>
> Thanks for helping me and my friend with these
> answers. Another question:
>
> If you take work out of a kiln while it is too hot to
> touch with the bare hands, will it damage the electric
> kiln?
>
> Thanks for the answer! The more the merrier: we can
> take an average of who think it does, and who doesn't
> think it damages the kiln.
>
> ELise in Miami
>
> =====
> Pincu Pottery
> Funktional Ceramic Art
> http://www.basic-learning.com/pincupottery/
>
> __________________________________________________
> Do You Yahoo!?
> Talk to your friends online with Yahoo! Messenger.
> http://im.yahoo.com
iandol on sun 9 apr 00
------------------
Cindy Strnad comments in relation to taking work from the kiln while it is =
too
hot to handle=85
Basically, the shock of thermal change is hard on the elements. It shouldn't=
be
a problem for any of the rest of the kiln components.
I would ask, on what evidence does she base the latter statement.
I have expressed an opinion that phase changes and differential cooling =
rates
causing uneven contraction may cause refractory materials to deteriorate. In
some industrial situations refractories are never allowed to cool. They save
money by using high silica materials and are working twenty four hours a day
producing product. It=92s a question of economics.
Ivor Lewis.
| |
|
