Jonathan Kaplan on tue 25 jun 96
For those glaze gurus who could offer me some wisdom.....
I need to gather information on firing my electric kiln glazes in my new
gas kiln. Have not yet made the change, and am seekng information as to
what I may expect. WHile I am very well versed in either area, I have not
yet had the nerve to sacrifice 40 ft3 of pots to the dumpster if they don't
fire in the gas kiln.
The new gas kiln fires very well, in excess air, finally has decent
turndown (thanks Marc!!) and the numbers on my probe, at least at bisque,
are well within acceptable neutral range. Could I assume then that my cone
3 and cone five glazes will thusly resemble their electric kiln
counterparts?
TIA
Jonathan
Jonathan Kaplan
http://www.craftweb.com/org/jkaplan/cdg.shtml
(aka "Scooter)
jonathan@csn.net
Ceramic Design Group Ltd./Production Services Voice:
970-879-9139 POB 775112
FAXmodem: same
Steamboat Springs, Colorado 80477, USA CALL before faxing
"Arrive on time, tell the truth, be a good listener, and don't
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humor!"
Patrick Veerkamp on tue 25 jun 96
On Tue, 25 Jun 1996, Jonathan Kaplan wrote:
> I need to gather information on firing my electric kiln glazes in my new
> gas kiln. Have not yet made the change, and am seekng information as to
> what I may expect.
>Could I assume then that my cone 3 and cone five glazes will thusly
>resemble their electric kiln counterparts?
Jonathan: I asked the very same question to the Clayart group about 2
yrs ago. I received few replys at the time but those who did
respond seemed to think that the effects of firing glazes in an electric
kiln or in a gas kiln are very similar. I would agree that for the most
part this is true. I don't think you'll have to worry about the glazes
being radically different, however, I do think you'll notice some subtle
changes. It seems to me that the glazes were not as bright in the gas
kiln. They just didn't have that same sparkle as when they came from the
electric. Also, as I recall the first firing in the gas kiln was a bit
underfired which I presumed had something to do with the fact that I was
using small cones in a kiln setter in the electric kiln and a visual
signal from lg. cones in the gas kiln. I would also suggest that you
try to duplicate the firing cycle of your electric kiln as closely as
possible (my first firing in the gas kiln went pretty fast and this may
also account for the difference in surface texture I experienced). I
might also add that most of my electric oxidation glazes were also quite
nice when fired in a reduction atmosphere. They were obviously markedly
different in every way.
Good
luck.
Patrick Veerkamp
Southwestern University
veerkamp@southwestern.edu
Kenneth A. Moore on wed 26 jun 96
>>Could I assume then that my cone 3 and cone five glazes will thusly
>>resemble their electric kiln counterparts?
>
Jonathan,
I've just started firing a used gas kiln and wanted to test some of my old,
reliable ^6 electric glazes in reduction just for the heck of it. Well,
needless to say I didn't get reduction and all the old oxidation glazes came
out just as if they had been fired in the electic.
Julie Moore
Dirty Bird Pottery
Manassas, VA
kenmoore@pop.erols.com
.....still looking for a used pugmill....I'll pay shipping
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