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heat treating

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iowabow:

--- Quote from: JoJoDapyro on December 21, 2015, 12:40:17 pm ---I normally fill it. It is strange that it breaks while cooling. I normally have to wait 48 hours after it is off to be able to handle the stone. I don't ramp down, but the kiln is efficient enough that the cooling time is far longer than the ramp time.

--- End quote ---
that is a 10 ramp down but it goes slower at the end. That should be good so I wonder if you are holding at 190

mullet:
I am now using a small Kiln. I have a high, med, and low setting. The low setting with everything closed up got over 900 dgs before I shut it off and took the thermometer out. I now start out with the lid half on, the two plugs open and a thermometer under the lid. When the Temp starts crawling up I start closing holes and sliding the lid in more till I get the Temp I am looking for. When I think it has been long enough I shut it down and close the lid all of the way and wait about 12 hours before I open it.

 But, I also fill my Kiln to the top.

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