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Kiln for cooking rock
Otoe Bow:
I was talking to a lady at my work today after showing her my Johnstone point about heat treating rock. She told me she was looking at a used electric ceramic kiln on Craig's List for $100. It's pretty small, (inside dimension of about 11"x11"x4"), but you should be able to cook some small spauls fairly easily. It has a temperature range of between 400 F and 2300 F.
Since we have so many problems with Burn Bans, wind (and time), I got to thinking it might not be a bad idea to use a kiln. Do any of you have any experience using one?
Otoe
mullet:
Otoe,they work alright but you need a different themostat so you can bring the temperature up slower. I ruined some real good coral with the one you are talking about. A couple of 50# bags of charcoal work's really good over buried spalls.
cowboy:
Not yet Mike: I do have two in the shop but as of yet have'nt wired them up with a rheostat. If your ever around you can load one up for me :).
Wolf Watcher:
Otoe: I have been using a programable kiln for years and if you know what you are cooking it works great. It ramps up 50 degrees per hour until you reach your cooking temp and then stays there for what ever length of time you want. Then it ramps down at 50 degrees per hour until you can open it up. I found cobbles cook at lower temps than preforms or spalls!! I have a book that tells the degree range of most materials if you know what you are going to cook!
I can send you a copy if you would like! I started out with a little box kiln and ruined a lot of rock with it. Wolf Watcher
D. Tiller:
Hmmm! Get the Kiln, role slabs of porcelan and do it in all the colors of the rainbow. Even shape them to the shape you like. Oh! Remember they do shrink by 10% while in the Kiln so make them 10% over the size you would like. Now there will be no need to go out to hunt flint or obsidian! :o ;D
David T
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