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| Boro Room -- For Boro-related tips, techniques, and questions. |
2007-04-12, 3:48pm
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yukue fumei
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Join Date: Apr 25, 2006
Location: SoCal
Posts: 4,954
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Graphite kiln liner
Anyone use these?
I just ordered one but am curious if anyone has one and how they like it...
thanks!! 
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nagi
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2007-04-12, 3:50pm
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Boro Brat
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Join Date: Sep 09, 2005
Location: Maine
Posts: 3,732
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I've been thinking about ordering one, too...I'll be interesed to hear what people think of it 
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Pipyr
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2007-04-12, 5:26pm
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Save the Numbats
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Join Date: Jul 23, 2005
Location: The Arctic
Posts: 577
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Sure, they are great. if you keep your kiln above1050 at all though, they disintegrate over a week or two.
I found some guy selling graphite discs on ebay made form the same material... he said his friend had a gasket company, and the discs were the leftovers from punching a big gasket. This stuff is made from compressed graphite powder. Don't know if he's still around ... his ebay id was... um, uh ... 'dickcmdr'.
Anyway, sure, it's nice stuff. I don't have much use for it now as I don't make many larger pieces so I don't get it any longer. There are other things you can use, like the fusing fiber fabric (not fusing paper - the textured stuff), boro plate glass, ceramic tiles, and .. hmmm.. probably other stuff.
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2007-04-12, 6:02pm
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product of the universe
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Join Date: Sep 06, 2005
Location: Rutvegas Vt
Posts: 598
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Quote:
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Sure, they are great. if you keep your kiln above1050 at all though, they disintegrate over a week or two.
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This has not been my experience with this stuff. It does break down over time but i get like 6 months out of a piece. when i'm doing large stuff and am in and out of the kiln i turn it up past 1100. When my relay went and the kiln went up past 2200 it turned it to dust basicly.
Also when i got my large square i cut it into four pieces and placed it where glass i would be working on rests in the kiln. If you don't wanna mess with kiln dust on your glass this is the stuff to get.
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Chris
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And the men who hold high places,Must be the ones to start,To mold a new reality,Closer to the heart--Rush
Currently using fire.
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2007-04-12, 6:13pm
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yukue fumei
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Join Date: Apr 25, 2006
Location: SoCal
Posts: 4,954
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Thanks so much for your replies--this is exactly what I was looking for.
I wonder if the difference between disintegrating and holding up is the regular vs high density graphite? 
I will keep notes on how it holds up. I do anneal above 1050F and strike at 1100F but not for long periods of time. It was a good price though, and if I can avoid that wacky kiln dust it will be awesome!
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2007-04-12, 7:11pm
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product of the universe
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Join Date: Sep 06, 2005
Location: Rutvegas Vt
Posts: 598
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I got mine from abr i don't know if its high density or not. But youll definatley be happy not dealing with the kiln dust.
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Chris
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And the men who hold high places,Must be the ones to start,To mold a new reality,Closer to the heart--Rush
Currently using fire.
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2007-04-12, 10:27pm
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Save the Numbats
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Join Date: Jul 23, 2005
Location: The Arctic
Posts: 577
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I never go above 1100... and mine sure did disintegrate into weird red dust. Only at the back of the kiln, an Aim 99... the front is so much cooler that I can anneal soft glass without slumping, and the graphite there stays the same forever. Some kinds I had fell apart at different rates. I guess I don't know how many days or weeks it took.
Kiln temps and pyrometer read outs vary, i guess.
My friend was convinced he always kilned to 1350... turned out he had the pyrometer sticking in all the way. It's hard to compare exact temps.
Anyway, get the graphite, , you'll love it!
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2007-04-13, 6:54am
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Senior Member
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Join Date: Feb 24, 2006
Posts: 1,168
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i spoke to the company they are not meant for boro temps, fine for soda lime.not that you cant use them they just will break down faster.
ro
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2007-04-13, 10:14am
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Senior Member
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Join Date: Dec 31, 2005
Location: Corpus Christi
Posts: 508
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We got the bright idea to try a high density piece of graphite as a kiln shelf for fusing. It turned in to a chocolately mess. It took us a long time to clean up the mess, as the dust got everywhere.
Steve
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Steve & Susie Wright
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2007-04-13, 10:25am
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Macaw Mamma
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Join Date: Dec 31, 2005
Location: South Carolina
Posts: 1,777
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Quote:
Originally Posted by SteveWright
We got the bright idea to try a high density piece of graphite as a kiln shelf for fusing. It turned in to a chocolately mess. It took us a long time to clean up the mess, as the dust got everywhere.
Steve
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Thanks for posting this Steve
I was wondering about using this for fusing, sorry for your mess, but you did save me lots of trouble
LOL!!!!
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2007-04-13, 10:39am
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Senior Member
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Join Date: Sep 16, 2005
Location: Western Washington
Posts: 506
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We have had a graphite liner in our kilns since the flame off in New Mexico, several years ago and its been great I have had to replace it but believe it was over a year of good use before the back of it was starting to break up
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2007-04-13, 2:58pm
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yukue fumei
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Join Date: Apr 25, 2006
Location: SoCal
Posts: 4,954
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Cool-
thanks for all the info!!!
I don't expect it to last a super long time but 6 months to a year would be perfect.
 hi sunray!
Juln-I reread your post and will look into the ceramic tiles....I have some boro plate glass....that sounds like a good alternative-thanks!
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2007-04-13, 6:25pm
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i'm not dave
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Join Date: May 21, 2006
Location: cockaigne, sanger, ca
Posts: 475
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i use a graphite pad for fusing. got it from winship designs in oregon. cut it to size w/a jigsaw (lots of dust). works great. its NOT a liner but a 1/4" thick slab. so far has lasted thru at least 20 firings and i suspect there are a good 30-50 more left in it.
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2007-04-15, 6:30am
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Senior Member
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Join Date: Feb 24, 2006
Posts: 1,168
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drew fritts uses popcorn salt to nestle his marbles in, i havent tried it yet, but interesting. stops them from rolling around without imprinting on them, finer than setting on fiber blanket. he uses it in a steel tray.
ro
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2007-04-15, 8:15am
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yukue fumei
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Join Date: Apr 25, 2006
Location: SoCal
Posts: 4,954
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thanks so much Ro and Dave!
Really good info to have
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2007-04-15, 10:11am
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addicted to the flame
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Join Date: Nov 13, 2005
Location: Anchorage, Alaska
Posts: 256
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There are many different grades of graphite and binders because I have seen graphite crucibles for casting non-ferrous metals. Some of those temperatures reach nearly 2700F. In that case, the binder is either a type of clay, silicon carbide, or some other thing. I'm sure, if you did a search on the web, you could find a high-temperature graphite that would fit your needs. The range of graphite products is truly astounding -- don't limit yourself to glass-supply houses.
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2007-04-15, 10:56am
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yukue fumei
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Join Date: Apr 25, 2006
Location: SoCal
Posts: 4,954
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WOW!
Awesome info Barb!
thank you so much!!
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