Primitive Archer
Main Discussion Area => Flintknapping => Topic started by: Bill Skinner on September 03, 2009, 11:45:42 pm
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I just got a 30 pound chunk of raw coral. Nice and translucent. What temp do you cook it at? I have worked raw coral and I don't want to again. Bill
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How are you cooking it? a kiln , toaster oven , turkey roaster or in the ground ? And it depends how thick the spalls are , but 550 and 3-4 hrs hold time is usually good. I need a kiln bad , but my best method is abo style dig a small depression and lay the spalls out not touching each other and make sure the tops of all the spalls are level with each other ,then cover with about 2" - 3" of DRY sand and pack the sand on top and then spred a 20# bag of charchol even across and light and "set it and forget it " . and allow for a day to TOATALLY cool down slowley with out disturbing the sand or blanks ' i know its hard' . When done they shoulb be good and glassy with color change . If some didnt treat all the way its ok you can flip them and add them to the next batch rather than blowing up good rock by getting it to hot , Hope this helps - john
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I spall it and cook it in a toaster oven at 450 all night. It's worked on quite a bit , so far.
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I need a kiln bad
I still have one ....not a Kiln for Clay....but an Oven for Welding Rods....goes to 550 degrees....and still works just fine....still looking for a Taker on it....I thought I had someone....but they have never emailed Me back......
Looks just like this one....but not as Pretty....but still works just fine
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El D......a kiln for welding rods? What kind of rods? Never heard of heat treating welding rods...... :o
Wayne
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All of Our Chrome...Stainless...Monel...Hasteloy....Inconell....and even 8014 Low/Hydrogen Rod has to be kept at 350-400 degrees when not being used...and turned in every 8 Hours to be reheated if you still have it out in the Field Welding....new specs for the Refinery...trying to keep Moisture Content down in the Flux I guess...
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Mike if its 110V I would be interested in it :) Strap it on your bike next time ya come home eh ;D
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Mike if its 110V I would be interested in it :) Strap it on your bike next time ya come home eh ;D
It.s 110 volt alright
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.and turned in every 8 Hours to be reheated if you still have it out in the Field Welding....new specs for the Refinery...trying to keep Moisture Content down in the Flux I guess...
We had to use portable ovens for the Hydrogen rods,as soon as they came out of the stores you put them into your oven what clipps onto your belt.Bloody inspectors would check the temp of your oven/rods and the steel you were welding' usually when your screen was down >:D .
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Yeah...We have Portable Rod Ovens too....and Insulated Rod Caddy's that you put on your Belt to Hold them...
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What ever happened to good ol coat hangers! ;D
Wayne
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What ever happened to good ol coat hangers! ;D
Wayne
Or an Acetylene Torch and a Roll of Baling Wire!!
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I sure remember welding expansion chambers on dirt bikes with a torch and coat hanger.
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I sure remember welding expansion chambers on dirt bikes with a torch and coat hanger.
So do I....and welding Exhausts on my Roundy-Round Car with whatever I could find.....Baling Wire....Tie Wire....Clothes Hangers....Man are We letting them all know Our Age..... :P
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Yes but what about Bills original question. ;D
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Bill i use my cookin oven. i got those aluminum cookin trays the kind you cook a turkey in.. i fill those with sand and put the rocks in the sand.
I've cooked coral the same way. like Eddie said 450*
Happy knappin to ya.
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Yes but what about Bills original question. ;D
450 degrees....for 8-10 hours....let cool down slowly.....oh....and make sure that you don't try to cook the whole thing in one Piece....may just explode and take out the Wife's Oven ......good enough Mr. Snyder...... >:D.... ;)
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Follow up. I cooked it at 450 and let it cool down. I then proceeded to turn it into fish tank gravel. I have broken every point I started in the last two days. The rock is great, the knapper is going to a 3-D shoot and calm down. Bill
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Hey Justin, Look at all the FREE extra knowledge he gained. Just like that long journey down the road of life; you might get sidetracked from time to time. ;D ;) :P
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I use a cut in half water heater filled with sand(Claude,lol) I bury my coral an inch to 2 inches , I control my temps with depth, you never said what color your coral is. Clear/bleish will fire china white, it can take up to 600 the "gem" qulity coral will take less as its more sensitive to the heat.I put 1 bag of charcoal on the top evenly and light it, its a 3 day from start to heat to cool down.
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