paul m wilmoth on wed 17 sep 97
Dear Tony,
I just read your message to Karl??? Unknown to me too ! Any way
if I read your note correctly, it said that you have coated a hard brick
wood/salt kiln with ITC. After the numerous firings did the ITC stick OK
to the salt glazed hard brick surface? Have you any suggestions?
I have a wood fired salt kiln that I have fired about 20 times
and I have contemplated giving it an ITC coating to cut down on my firing
time. Did the ITC change the amount of salt that you need to put into
the kiln for an adequate salting? I have been waiting to get more
information from other wood/salt potters, so your in put on this will be
very much appreciated!! How did the ITC hold up to the ash and salt ??
Thanks -- Paul Wilmoth
Clennell on thu 18 sep 97
>----------------------------Original message----------------------------
>Dear Tony,
>
> I just read your message to Karl??? Unknown to me too ! Any way
>if I read your note correctly, it said that you have coated a hard brick
>wood/salt kiln with ITC. After the numerous firings did the ITC stick OK
>to the salt glazed hard brick surface? Have you any suggestions?
> I have a wood fired salt kiln that I have fired about 20 times
>and I have contemplated giving it an ITC coating to cut down on my firing
>time. Did the ITC change the amount of salt that you need to put into
>the kiln for an adequate salting? I have been waiting to get more
>information from other wood/salt potters, so your in put on this will be
>very much appreciated!! How did the ITC hold up to the ash and salt ??
>
>Thanks -- Paul Wilmoth
Dear Paul: I have sprayed my wood/salt kiln with ITC l00. The fuel
savings were minimal ( 10%). It is a fairly large investment for this
savings. I had sprayed the hard bricks because I have used a soft brick
door which is always the hotter side. I had hoped that perhaps the ITC
would help to even out the kiln. This has not been our experience. We have
however, sprayed a softbrick kiln that we are salting and we are using a
incredibly small amount of salt for a good salting. 2 pounds sprayed in a
water solution into a 20 cubic foot kiln. We've only fired the kiln 3 times
so we're just getting a handle on things. Firing this week with pots
filled with salt throughout the kiln ala La Bourne firings plus 2 pounds
sprayed. Zap me if you want to know the outcome.
Cheers,
Tony
Sheila and Tony Clennell
Gleason Brook Pottery
Box l0, RR#2,
Wiarton, Ontario
NOH 2TO
Canada
Phone # 1 (519) 534-2935
Fax # 1 (519) 534-0602
E-mail clennell@bmts.com
Craig Martell on thu 18 sep 97
Hi Paul:
I just sprayed my hard brick salt kiln with ITC 100. I also relined the
upper 10 feet of the stack with kaowool sleeves sprayed with ITC 100. I
coated both ends of this section, which is 10" steel culvert with ITC 213 to
protect the metal from the salt vapor. Prior to spraying with ITC, the
bricks had been coated with a wash of 75% alumina hydrate and 25% kaolin,
and fired many times. I plan to keep the List posted as to the results. The
first firing since coating with ITC will probably be the end of next week.
I am also going to spray some IFB and fiber samples with ITC and salt them
in the firing to test. I'll probably do this several times to see how they
hold up.
I might also mention that I don't fire with wood. I have two Big Berthas
that I fire with propane, so the wood ash thing won't be a factor unless I
spray one of the ITC refractory tests with wood ash and salt it. I guess I
could do that!!
I have appreciated the input of people on the list such as Tony Clennell and
Linda Blossom as well as many others. What I have read so far is enough to
at least give ITC products a try and I must say that I'm very optimistic.
I'm more concerened with good ware and the longevity of the kiln, than I am
with saving money with individual firings, but that won't hurt either.
Talbott on fri 19 sep 97
I have talked with at least one potter who has used the ITC 100 in his salt
kiln and he told me that the membrane created by the ITC is extremely
brittle as a result of the salt firings and it is starting to flake... I
have also read of other instances when the ITC has flaked and pots were
ruined as a result. How many pots is one willing to lose in order to
experiment? It is simply my opinion that over time the ITC membrane can
flake... If the kiln is used just for bisque firings then that is no
problem but for glaze firing the flaking can be disastorous... I really do
hope that I am wrong on this topic and that the ITC really does improves
fuel economy and glaze quality... Someone please prove me wrong on this
one! ...Marshall
>----------------------------Original message----------------------------
>Hi Paul:
>
>I just sprayed my hard brick salt kiln with ITC 100. I also relined the
>upper 10 feet of the stack with kaowool sleeves sprayed with ITC 100. I
>coated both ends of this section, which is 10" steel culvert with ITC 213 to
>protect the metal from the salt vapor. Prior to spraying with ITC, the
>bricks had been coated with a wash of 75% alumina hydrate and 25% kaolin,
>and fired many times. I plan to keep the List posted as to the results. The
>first firing since coating with ITC will probably be the end of next week.
>I am also going to spray some IFB and fiber samples with ITC and salt them
>in the firing to test. I'll probably do this several times to see how they
>hold up.
>
>I might also mention that I don't fire with wood. I have two Big Berthas
>that I fire with propane, so the wood ash thing won't be a factor unless I
>spray one of the ITC refractory tests with wood ash and salt it. I guess I
>could do that!!
>
>I have appreciated the input of people on the list such as Tony Clennell and
>Linda Blossom as well as many others. What I have read so far is enough to
>at least give ITC products a try and I must say that I'm very optimistic.
>I'm more concerened with good ware and the longevity of the kiln, than I am
>with saving money with individual firings, but that won't hurt either.
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
http://fmc.utm.edu/~dmcbeth/cag/naples.htm
2nd ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1998)
Details will be forth coming!!!
Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
WBS Live Chat Room, Sat Nites 10 PM EDT & Sun Afternoons at
1 PM EDT Private Room: Clayarters E-MAIL: clupus@ime.net
Janet on sat 20 sep 97
Hiya,
What does itc and ifb stand for...we have a salt fired kiln in new
zealand and haven't been paying proper attention
Cheers from Janet
>
Craig Martell on sat 20 sep 97
Hey Marshall:
I don't think anyone is going to convince anyone else to use ITC or not. I
also don't think that anyone is going to prove or disprove the value of ITC
to you or anybody else. If you REALLY want to be assured about the
products, get some samples from the company and give 'em hell. That's what
I plan to do and no, I'm not worried about what is going to happen to my
salt kiln. There are so many variables in every facet of ceramics that it
is hard to draw any real conclusions from what you hear. Maybe the ITC that
flaked off in your friends kiln was a result of him or her not applying it
properly or not preparing the surface correctly. Maybe the application was
too thick. Who knows for sure? I know what I did and I'm banking on the
stuff adhering well. So far, so good.
All this BSing back and forth isn't getting the job done. Do some testing
and find out if this stuff is any good or not. That is, if you would like
to know FYI or for intended future use. If you never intend to use ITC,
relax, make some good pots and let the rest of us burn in hell for trying
the stuff. I'm serious about the intent of this post Marshall but I
really mean it in a light hearted manner and I'm not flaming you. Honest!!
Regards, Craig Martell-Oregon
Clennell on sun 21 sep 97
>----------------------------Original message----------------------------
>Hiya,
> What does itc and ifb stand for...we have a salt fired kiln in new
>zealand and haven't been paying proper attention
>
> Cheers from Janet
>>
Janet: IFB stands for insulating fire brick (softbrick) and ITC is
International Technical Ceramics which is a ceramic coating for energy
savings and refractory protection. If you can get your hands on the most
recent Clay Times magazine there is a big article about ceramic coatings
(ITC in particuliar) by Nils Lou. Its a US publication probably advertised
in Ceramics Monthly.
Have a ride on Barry Bricknells train for me.
Cheers,
Tony
Sheila and Tony Clennell
Gleason Brook Pottery
Box l0, RR#2,
Wiarton, Ontario
NOH 2TO
Canada
Phone # 1 (519) 534-2935
Fax # 1 (519) 534-0602
E-mail clennell@bmts.com
Robert Compton on sun 21 sep 97
Janet wrote:
>
> ----------------------------Original message----------------------------
> Hiya,
> What does itc and ifb stand for...we have a salt fired kiln in new
> zealand and haven't been paying proper attention
>
> Cheers from Janet
> >
Hi again,
IFB means Insulating Fire Brick, the soft brick that are good
insulation rather than the hard brick we use in salt or woodk kilns. ITC
is short for International Technical Ceramics. I have spoken with the
people who make this stuff, and I think the jury is still out on where
is is best used. Yes to cover fiberblanket or coat IFB as this will stop
fiber from falling off and seal small gaps inbetween softbricks. It
bonds to become part of the material it covers, kinda like an egg shell.
I have spoken with seveal potters who used it in their wood kiln and saw
little increased effiecncy, and this stuff is not cheap, it would cost
about $400 to coat the inside of a 60 cu ft kiln.
If you send me you s-mail address I will try to get you a copy
of the Axner catagloue, it would be fun for you yo see what is
available.
Are you still doing Raku?? Since you moved are you still in
dairy farming?
Bob
--
Robert Compton Phone: 802-453-3778
3600 Rt 116 http://homepages.together.net/~rcompton
Bristol, Vermont 05443 rcompton@together.net
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