Bill Walker on fri 2 may 97
Does anyone know what temperartures are reached when pots are
fired in a bonfire?
Bill Walker
Alfred NY USA
walkerw@bigvax.alfred.edu
ret on sat 3 may 97
If you put a bottle, beer or wine, in the hottest part of the fire and
it slumps, you reach high enough temps to fire pots. Depending on the
iron content of the tinted glass, of course. Somewhere around raku
temperatures.
ELKE BLODGETT email: eiblodge@freenet.edmonton.ab.ca
12 Grantham Place
St. Albert, AB T8N 0W8
403 (458-3445); 403 (727-2395)
On Fri, 2 May 1997, Bill Walker wrote:
> ----------------------------Original message----------------------------
>
> Does anyone know what temperartures are reached when pots are
> fired in a bonfire?
>
> Bill Walker
> Alfred NY USA
> walkerw@bigvax.alfred.edu
>
Dannon Rhudy on sat 3 may 97
Well, you could ask any number of people there, no doubt. But,
since you didn't:
The temperature reached depends upon what materials you use to
fire. Woods vary in the temperature at which they burn, and
the speed. Manure, another temperature. Coal, another. Coal
burns hottest. The major factors in temperature are, however,
the LENGTH OF TIME the firing lasts, and whether or not you cover
the fire/pit with any heat-holding material, metal, ceramic
blanket, etc. You could expect a temperature of about 900F for
a quick wood and/or manure firing; the temp will build much
higher in a lengthy pit-fire, with a cover. I've had them up
around 1500F on overnight pitfires. Keep in mind that the temp
of the fire will not equal the temp of the pots, unless the
pots are in there a substantial amount of time.
Dannon Rhudy
potter@koyote.com
----------------------------Original
message----------------------------
Does anyone know what temperartures are reached when pots are
fired in a bonfire?
Bill Walker
Alfred NY USA
walkerw@bigvax.alfred.edu
Fred & Susan de Wit on sat 3 may 97
Put a cone under a cup and see what happerns. Try the lowest cone to 04
first. Make a note on how fast the wind is blowing!
----------
From: Ceramic Arts Discussion List on behalf of Bill Walker
Sent: Friday, May 02, 1997 4:10 AM
To: Multiple recipients of list CLAYART
Subject: Bonfire Temperatures
----------------------------Original message----------------------------
Does anyone know what temperartures are reached when pots are
fired in a bonfire?
Bill Walker
Alfred NY USA
walkerw@bigvax.alfred.edu
John Guerin on sun 4 may 97
In a message dated 97-05-02 07:18:30 EDT, you write:
<< Does anyone know what temperartures are reached when pots are
fired in a bonfire?
>>
It depends a lot on what kind of fuel you are using. The type of outdoor
firing that the pueblo indians do using cow or sheep dung can get up to 1000
to 1200 degrees F.
John Guerin
Tucson,AZ
Marcia Selsor on sun 4 may 97
We did some "reinactments" of wood firing /no pit in grad school.
Research seemed to indicate that wood was added during the firing to
keep the blaze going for a sufficient time. Elca's suggestion of using
glass and watch for slumping seems like a good idea.
Marcia in Montana>
> > Does anyone know what temperartures are reached when pots are
> > fired in a bonfire?
> >
> > Bill Walker
> > Alfred NY USA
> > walkerw@bigvax.alfred.edu
> >
--
Marcia Selsor
http://www.imt.net/~mjbmls/
mjbmls@imt.net
Vince Pitelka on sun 4 may 97
At 07:10 AM 5/2/97 -0400, you wrote:
>----------------------------Original message----------------------------
>
>Does anyone know what temperartures are reached when pots are
>fired in a bonfire?
Bill -
It of course depends on WHERE the pots are in the bonfire. The following
are all approximations based on my own experience. If the pots are buried
in sawdust beneath the fire, then it is unlikely that they will get hotter
than 800 or 900 degrees F., barely enough to begin sintering. If they are
fired on/in a grate/cage above the fire, as in some Southwest Native
American firings, and if the fire is built up high enough for long enough,
they can reach 1000 to 1200 degrees. If they are directly among the coals
in a good hot fire, they can reach 1400 to 2000 degrees.
- Vince
Vince Pitelka - vpitelka@DeKalb.net
Phone - home 615/597-5376, work 615/597-6801
Appalachian Center for Crafts
1560 Craft Center Drive, Smithville TN 37166
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