Penny Hosler on thu 29 apr 99
I have a Skutt 1027, but apparently there's a problem in my loading. A =
full
load of bisqued tiles will come out of the glaze firing fine all except one =
of
the tiles on the very bottom shelf is inevitably broken. Using an =
Envirovent,
so is it cooling too quickly at the bottom? I thought of stacking 2 shelves
together at the bottom to create a sort of heat sink before loading it.
Good/bad idea? Also, when I place the 1/2 shelves in, I cover the drilled =
holes
with shelves rather than lining them up so the holes don't directly open to =
the
top of the kiln. Is this right/wrong?
TIA
Penny in WA
Chris Schafale on thu 29 apr 99
Penny,
One easy thing to try: turn off the Envirovent after the kiln has
reached the target temp. My understanding is that it's fine to do
this as soon as the kiln is below 2000 F. I've had generally better
luck with the kiln not cooling too fast when I do this.
Chris
> ----------------------------Original message----------------------------
> I have a Skutt 1027, but apparently there's a problem in my loading. A full
> load of bisqued tiles will come out of the glaze firing fine all except one of
> the tiles on the very bottom shelf is inevitably broken. Using an Envirovent,
> so is it cooling too quickly at the bottom? I thought of stacking 2 shelves
> together at the bottom to create a sort of heat sink before loading it.
> Good/bad idea? Also, when I place the 1/2 shelves in, I cover the drilled hol
> with shelves rather than lining them up so the holes don't directly open to th
> top of the kiln. Is this right/wrong?
>
> TIA
> Penny in WA
>
>
Light One Candle Pottery
Fuquay-Varina, NC
candle@intrex.net
Penny Hosler on sat 1 may 99
Carol,
Sorry, I wasn't concise enough when I said I covered my bottom drilled
holes. The very bottom shelves are always set on 1" posts. Just
meant that I didn't leave a direct "line-of-sight" up the middle of
the kiln between bottom-drilled and top-drilled holes, trying to avoid
any wind tunnel action. And I always put an empty shelf on the very
top to avoid cold spots. That's why I was confused (news
flash)--seems like the hot air would have been drawn downwards,
evening out the normal "warm-air-rises" cooling process. If
anything, it seems the ware on the top would cool more quickly and
break. But I'm just going to try shutting the vent off at about
1900 deg and see what happens. Wish me luck.
Penny in Sequim, WA
pshosler@olypen.com
-----Original Message-----
From: Carol Seidman
Subject: Re: Bottom ware breaking in elec kiln
>----------------------------Original
message----------------------------
>Penny: Covering the hole drilled in the bottom of your kiln blocks
the
>action of the fan. The following test was listed in the instructions
>that came with my vent. Close the kiln, turn on the venting fan, hold
a
>lit match at the hole in the kiln lid. You should see the flame
being
>drawn into the hole. Hope this helps Carol Seidman
>
>Penny Hosler wrote:
>
> ----------------------------Original
message----------------------------
> I have a Skutt 1027, but apparently there's a problem in my
loading. A full
> load of bisqued tiles will come out of the glaze firing fine all
except one of
> the tiles on the very bottom shelf is inevitably broken. Using an
Envirovent,
> so is it cooling too quickly at the bottom? I thought of stacking 2
shelves
> together at the bottom to create a sort of heat sink before loading
it.
> Good/bad idea? Also, when I place the 1/2 shelves in, I cover the
drilled hol
> with shelves rather than lining them up so the holes don't directly
open to th
> top of the kiln. Is this right/wrong?
>> TIA
>> Penny in WA
>
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