Hank Murrow on sat 5 jan 02
Curt Nelson wrote;
>Within the last few days there was a post noting that
>there was a difference in glaze requirements depending
>on whether the piece was to be oxidation fired in an
>electric kiln with it's static atmosphere, or oxidation
>fired in a fuel fired kiln with the kind of atmosphere
>associated with that kind of kiln.
>
>If I read it right and remember it correctly, it was
>news to me. I've tried all the key words and possible
>authors in the archives to retrieve this post, with no
>luck. Anyone recall reading this in the last week or so?
Dear Curt;
Perhaps it was my answer to this post? It is difficult to acheive a
true oxidizing atmosphere in an electric, short of pumping air through it.
With a combustion kiln it IS possible (if the kiln design supports it) to
acheive an oxidizing atmosphere. I fire about half my work to C/10 in
oxidation.
>HELLO!
>I HAVE BEEN LOOKING IN THE ARCHIVES FOR CONE 9-10 OXIDATION GLAZES AND I WAS
>WONDERING IF ANYONE OUT THERE HAS ANY MORE RECIPES IN THIS RANGE THAT ARE
>NOT ALREADY POSTED. I AM TEMPORARILY WITHOUT A GAS KILN AND NEED HELP!
>ALSO, THERE IS A WEB SITE CALLED GLAZE EXCHANGE, BUT I COULD NOT FIGURE OUT
>HOW TO ACCESS THE DATABASE WITH ALL THE RECIPES ON IT. SO IF ANYONE COULD
>TELL ME HOW TO DO SO I WOULD APPRECIATE IT. THANKS!
>PAUL BORIAN
Paul;
There is a substantial difference between glazes fired to C/10 in
an electric kiln (neutral, really), and those fired in a combustion kiln in
oxidation. You might narrow your request to C/10 electric glazes.
Regards, Hank
Curtis Nelson on sat 5 jan 02
Within the last few days there was a post noting that
there was a difference in glaze requirements depending
on whether the piece was to be oxidation fired in an
electric kiln with it's static atmosphere, or oxidation
fired in a fuel fired kiln with the kind of atmosphere
associated with that kind of kiln.
If I read it right and remember it correctly, it was
news to me. I've tried all the key words and possible
authors in the archives to retrieve this post, with no
luck. Anyone recall reading this in the last week or so?
Or better yet, what comments do you have about the
validity of this? And if this IS the case, what are the
factors involved here?
Curious,
Curt Nelson
Dave Finkelnburg on sun 6 jan 02
Curtis,
You ask if there is a post saying there is a difference between electric
and fuel-fired oxidation firing.
In THEORY, no.
In practice, well it depends on the kiln. Any fuel burner has areas
which are hot and oxygen deficient both, and how those gases travel through
the kiln affect the results. So even if the average atmosphere in the kiln
is oxidizing, some of the ware may look different in some fuel-fired kilns,
even in an oxidizing firing, than in an electric. In general, the more
efficient the burners, the more uniform the oxidation will be in a
fuel-fired kiln fired in oxidation.
Good firing!
Dave Finkelnburg
-----Original Message-----
From: Curtis Nelson
To: CLAYART@LSV.CERAMICS.ORG
Date: Saturday, January 05, 2002 7:27 PM
Subject: Oxidation Firing - Electric vs Gas
>Within the last few days there was a post noting that
>there was a difference in glaze requirements depending
>on whether the piece was to be oxidation fired in an
>electric kiln with it's static atmosphere, or oxidation
>fired in a fuel fired kiln with the kind of atmosphere
>associated with that kind of kiln.
>
>If I read it right and remember it correctly, it was
>news to me. I've tried all the key words and possible
>authors in the archives to retrieve this post, with no
>luck. Anyone recall reading this in the last week or so?
>
>Or better yet, what comments do you have about the
>validity of this? And if this IS the case, what are the
>factors involved here?
>
>Curious,
>
>Curt Nelson
>
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