Steve Mills on wed 18 jun 08
I know this may sound a bit "folksy", but I learnt long ago (before Oxy-probes) a very simple way of judging a neutral atmosphere in a Kiln. The technique involves a small piece of wood, which you set light to, and then extinguish the flame leaving it smouldering.
The smoking piece of wood is held beneath the open spy hole, and the direction the smoke goes indicates the atmospheric conditions; away from the Kiln: reducing, into it: oxidation, straight up: neutral.
My friend always used an Apple Wood twig because it smells rather nice.
I still find this a reliable (and cheap) technique.
Steve
Bath
UK
--- On Tue, 6/17/08, Hank Murrow wrote:
From: Hank Murrow
Subject: Re: reoxidation at end of firing cycle?
To: CLAYART@LSV.CERAMICS.ORG
Date: Tuesday, June 17, 2008, 5:10 PM
On Jun 16, 2008, at 10:11 PM, Bob Johnson wrote:
> Thanks, Hank, for your thorough and thoughtful reply regarding
> oxidation at
> the end of the firing cycle. I don't have an oxyprobe, but I will
> try to
> imitate your method as best I can by eyeballing the draw at the
> peep holes.
> Is .07 a lot of oxygen or a little?
It is characterized by a complete lack of back pressure at spyholes
and at the flue exit, and a very clear atmosphere inside the kiln.
Just a couple of notches cleaner than neutral.
>
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