Gary Wang on tue 13 oct 98
I have been paying attention to the recent discussions on
the reduction firing using an electric kiln.
One way to monitor the degradation of elements in an
electric kiln is to measure the resistance of the element.
(Disconnect the kiln from the outlet and use precaution when
you do this.) You get a multimeter that measure resistance
from Radio Shack.
It would be interesting to measure the resistance of the element
after a 'reduction' in the kiln, and compare the value with
the next firing in oxidation. If the values are the same, then
we know that the diameter of the effective conducting
area in the element is not changed, and the oxidation firing
merely replace the protective coating of Alumium Oxide.
I seems to me that by applying the ITC 213 coating onto
the element will raise the internal temperature of the element.
and the element will degrade faster when it's subject to higher
temperature. It could be interesting to see some experimental
results on this area.
There is a good article by Nil Lou on
Refractory Coatings Offer New Firing Possibilities
You can find it at
http://www.ceramicsoftware.com/education/firing/rcc.htm
Gary Wang
........................................................................
Item Subject: WINMAIL.DAT
Couldn't convert Microsoft Mail Message Data item to text at a gateway.
The Kiln Gods on wed 14 oct 98
> I seems to me that by applying the ITC 213 coating onto
> the element will raise the internal temperature of the element.
> and the element will degrade faster when it's subject to higher
> temperature. It could be interesting to see some experimental
> results on this area.
> Gary Wang
Hi Gary,
That`s right. Our experiments with the ITC in electric kilns have proven,
to us, that there is not alot of benefit. A well ventilated kiln with
oxidized elements is just as good... & alot less expensive.
Chris @
Euclid's Kilns and Elements
1-800-296-5456
Web Site: http://www.euclids.com
E-Mail: mail@euclids.com
Barney Adams on thu 15 oct 98
I was at a workshop on kiln repair with Skutt and I asked about ITC
in my electric. I was told that the main problem Skutt was aware of
for their kilns was the ridge that is cut to hold the element has a lip
and with ITC coating on the lip actually blocks the heat from radiating
into the kiln. At least this is how I understood their explanation.
Barney
>
> ----------------------------Original message----------------------------
> > I seems to me that by applying the ITC 213 coating onto
> > the element will raise the internal temperature of the element.
> > and the element will degrade faster when it's subject to higher
> > temperature. It could be interesting to see some experimental
> > results on this area.
> > Gary Wang
>
> Hi Gary,
> That`s right. Our experiments with the ITC in electric kilns have proven,
> to us, that there is not alot of benefit. A well ventilated kiln with
> oxidized elements is just as good... & alot less expensive.
> Chris @
> Euclid's Kilns and Elements
> 1-800-296-5456
> Web Site: http://www.euclids.com
> E-Mail: mail@euclids.com
>
Nils Lou on fri 16 oct 98
There is alot of misinformation about the use of ITC products on electric
kilns--most of it I think from people who have not ACTUALLY experimented
with it.
Coating elements with ITC213 does not "raise the temperature" of the
element, nor does it increase the diameter of the element significantly.
It is not an insulator! It will simply prevent element degradation in
reducing atmospheres. I have a test kiln with almost 100 firings on it
with the original elements in reduction. As for ITC100 affecting the
radiation by obstructing the slots--sure, if the material is slathered on
the bricks surface. It is a good example of folks at Euclid and Skutt
simply not paying attention. ITC 100 should be sprayed on lightly like a
stain almost. If you are making statements of fact, please back it up with
experience and follow the manufacturers suggestions. Bad information is
worse than none. Nils Lou
On Thu, 15 Oct 1998, Barney Adams wrote:
> ----------------------------Original message----------------------------
> I was at a workshop on kiln repair with Skutt and I asked about ITC
> in my electric. I was told that the main problem Skutt was aware of
> for their kilns was the ridge that is cut to hold the element has a lip
> and with ITC coating on the lip actually blocks the heat from radiating
> into the kiln. At least this is how I understood their explanation.
>
> Barney
> >
> > ----------------------------Original message----------------------------
> > > I seems to me that by applying the ITC 213 coating onto
> > > the element will raise the internal temperature of the element.
> > > and the element will degrade faster when it's subject to higher
> > > temperature. It could be interesting to see some experimental
> > > results on this area.
> > > Gary Wang
> >
> > Hi Gary,
> > That`s right. Our experiments with the ITC in electric kilns have proven,
> > to us, that there is not alot of benefit. A well ventilated kiln with
> > oxidized elements is just as good... & alot less expensive.
> > Chris @
> > Euclid's Kilns and Elements
> > 1-800-296-5456
> > Web Site: http://www.euclids.com
> > E-Mail: mail@euclids.com
> >
>
Linda Blossom on fri 16 oct 98
If I understand this post - the lip prevents heat transfer when coated with =
itc,
it sounds like the person with this statement is hypothesizing rather than
speaking from experience. In my experience with itc (I have both 100 and =
296 on
the kiln interior and elements) this is irrational nonsense.
Linda Blossom
2366 Slaterville Rd.
Ithaca, NY 14850
6075397912
www.artscape.com
blossom=40lightlink.com
lpskeen on fri 16 oct 98
Barney Adams wrote:
> I was at a workshop on kiln repair with Skutt and I asked about ITC
> in my electric. I was told that the main problem Skutt was aware of
> for their kilns was the ridge that is cut to hold the element has a lip and wi
Barney,
That is the understanding I got from the Skutt rep at Cermatech.
--
Lisa Skeen ICQ# 15554910
Living Tree Pottery & Soaps http://www.uncg.edu/~lpskeen
"The hottest places in hell are reserved for those who, in times of
great moral crisis, maintain their neutrality." -- Dante
"The opportunity to be threatened, humiliated and to live in fear of
being
beaten to death is the only 'special right' our culture bestows on
homosexuals." - Diane Carman, Denver Post, October 10, 1998
Barney Adams on sat 17 oct 98
The Skutt rep told me that the ITC coating acts as insulation.
Thus preventing the radiation of heat out into the main area of the kiln
holding it in the groove and element. I have no experience with ITC.
Either ITC doesnt work as an insulation or it does. If it acts as insulation
then I cant see it only insulating the radiant heat in one direction.
I can only repeat the Skutt view of ITC.
Barney
> ----------------------------Original message----------------------------
> If I understand this post - the lip prevents heat transfer when coated with it
> it sounds like the person with this statement is hypothesizing rather than
> speaking from experience. In my experience with itc (I have both 100 and 296
> the kiln interior and elements) this is irrational nonsense.
> Linda Blossom
> 2366 Slaterville Rd.
> Ithaca, NY 14850
> 6075397912
> www.artscape.com
> blossom@lightlink.com
>
David Woodin Set Clayart Digest on sat 17 oct 98
I am glad to see this reply from Nils, and after spraying over 25 electric
kilns with ITC 100 all the feedback has been positive. The one time it was
put on the elements too heavily with a brush it made it more difficult to
change elements when the time came to change them.
David
David Woodin Set Clayart Digest on mon 19 oct 98
ITC is not an insulator and the manufacturer never claimed it to be. It does
reflect heat to the pots and fills up minute cracks in kilns resulting in a
tighter tougher coated kiln which will fire faster it you want. The elements
are protected from the harsh envirnoment of a kiln. Axner advertises a dual
gas and electric kiln made by ITC. The updated soon to be released book by
Nils Lou has alot to say about ITC products.
David
Nils Lou on tue 20 oct 98
The Skutt rep doesn't have a clue as to what the ITC coating does on the
metallic element. It DOES NOT ACT AS AN INSULATION. If he (she) were truly
interested information can be gotten directly from the ITC folks. This is
how information should be gotten, not hearsay. I'm not getting on Barney;
he;s just reporting what he heard--but from someone who apparently is not
interested in experimenting. Why? Nils
On Sat, 17 Oct 1998, Barney Adams wrote:
> ----------------------------Original message----------------------------
> The Skutt rep told me that the ITC coating acts as insulation.
> Thus preventing the radiation of heat out into the main area of the kiln
> holding it in the groove and element. I have no experience with ITC.
> Either ITC doesnt work as an insulation or it does. If it acts as insulation
> then I cant see it only insulating the radiant heat in one direction.
> I can only repeat the Skutt view of ITC.
>
> Barney
>
> > ----------------------------Original message----------------------------
> > If I understand this post - the lip prevents heat transfer when coated with
> > it sounds like the person with this statement is hypothesizing rather than
> > speaking from experience. In my experience with itc (I have both 100 and 29
> > the kiln interior and elements) this is irrational nonsense.
> > Linda Blossom
> > 2366 Slaterville Rd.
> > Ithaca, NY 14850
> > 6075397912
> > www.artscape.com
> > blossom@lightlink.com
> >
>
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