Mark Mondloch on wed 30 sep 98
I've got about 6 firings in on my new MFT car kiln. During the early
stage of the firing, the bottom front lags way behind. I'll have about
1100 F. in the top peep and still only be up to about 500 F. in the
bottom peep. I can even it out by pushing in the damper to create back
pressure at the lower peep, but I don't know if I want to do that since
I don't want to create a reducing atmosphere in the early part of the
firing. Once the burners are turned up everything evens out by the end
of the firing and it fires easy. I have had some problems with glazes in
that area I think because they end up firing so fast to catch up. I
guess I'm wondering if this is normal in this kiln and possible
solutions.
Thanks for any suggestions,
Sylvia
--
Mark & Sylvia Mondloch
Silver Creek Pottery & Forge
W6725 Hwy 144
Random Lake, WI 53075
mondfam@execpc.com
http://www.execpc.com/~mondfam
Nils Lou on sat 3 oct 98
Assuming you are describing a glost firing of bisqued ware there should
be little problem with building some pressure by adjusting the damper
slightly. Slight reduction in the early part of the firing should not have
a deleterious effect on most stoneware glazes. On copper reds it will
actually beneficiate the results. Try it and see. Nils
On Wed, 30 Sep 1998, Mark Mondloch wrote:
> ----------------------------Original message----------------------------
> I've got about 6 firings in on my new MFT car kiln. During the early
> stage of the firing, the bottom front lags way behind. I'll have about
> 1100 F. in the top peep and still only be up to about 500 F. in the
> bottom peep. I can even it out by pushing in the damper to create back
> pressure at the lower peep, but I don't know if I want to do that since
> I don't want to create a reducing atmosphere in the early part of the
> firing. Once the burners are turned up everything evens out by the end
> of the firing and it fires easy. I have had some problems with glazes in
> that area I think because they end up firing so fast to catch up. I
> guess I'm wondering if this is normal in this kiln and possible
> solutions.
> Thanks for any suggestions,
> Sylvia
>
> --
> Mark & Sylvia Mondloch
> Silver Creek Pottery & Forge
> W6725 Hwy 144
> Random Lake, WI 53075
>
> mondfam@execpc.com
> http://www.execpc.com/~mondfam
>
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