Maid O'Mud on sat 30 jun 07
I fired my kiln slow bisque yesterday. I propped the lid
on the provided metal slot and stayed in the studio
all day happily listening to the clicks and buzzes.
Then, apparently my brain turned off. I left the studio
(went upstairs) and forgot about the kiln. This morning
I checked out the kiln, figuring to unload and realized
DOH, I forgot to close the lid. Kiln had turned off
after over 20 hours getting to bisque temp. ARGH!
So, other than spending a ridiculous amount of money
on electricity, have I harmed either my kiln or my pots?
I've been a potter since the mid 80's, and this is a 1st.
I honestly don't know the answer(s).
TIA for any help or re-assurances.
Sam Cuttell
Maid O'Mud Pottery
RR 1
Melbourne, Ontario
N0L 1T0
CANADA
"First, the clay told me what to do.
Then, I told the clay what to do.
Now, we co-operate."
sam 1994
HYPERLINK "http://www.ody.ca/~scuttell/"http://www.ody.ca/~scuttell/
HYPERLINK "mailto:scuttell@ody.ca"scuttell@ody.ca
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2:15 PM
Cindy Gatto on sun 1 jul 07
Sam,
I'm not sure if you mean if you hurt anything by firing the kiln with the
lid propped or if you mean by the length of time it took to fire, but either way
no nothing would be damaged by either. I would be concerned with amount of
hours it took to fire though. A firing shouldn't take 20 hrs. especially a
bisque firing.What was it set to when you forgot about it?
Cindy Gatto & Mark Petrin
The Mudpit
228 Manhattan Ave
Brooklyn, NY 11206
718-218-9424
_www.mudpitnyc.com_ (http://www.mudpitnyc.com/)
mudpitnyc@aol.com
************************************** See what's free at http://www.aol.com.
WJ Seidl on sun 1 jul 07
Sam:
Since you only went to bisque, you shouldn't have a"much" trouble with
the pots.
You might have a funky glaze fit problem on those, though, since it's
not temp but heat work
that we measure, and some pots may have been closer to the elements on
one side than the other
for that very long time. Time will tell. Keep us posted, will you?
You have shortened the life of your elements, but not appreciably, not
enough to worry about. How many bisque firings
would it take to add up to 20 hours? 2? 3? Shouldn't be a problem.
All the best,
Wayne Seidl
Maid O'Mud wrote:
> I fired my kiln slow bisque yesterday. I propped the lid
> on the provided metal slot and stayed in the studio
> all day happily listening to the clicks and buzzes.
> Then, apparently my brain turned off. I left the studio
> (went upstairs) and forgot about the kiln. This morning
> I checked out the kiln, figuring to unload and realized
> DOH, I forgot to close the lid. Kiln had turned off
> after over 20 hours getting to bisque temp. ARGH!
>
> So, other than spending a ridiculous amount of money
> on electricity, have I harmed either my kiln or my pots?
> I've been a potter since the mid 80's, and this is a 1st.
> I honestly don't know the answer(s).
>
> TIA for any help or re-assurances.
>
> Sam Cuttell
> Maid O'Mud Pottery
> RR 1
> Melbourne, Ontario
> N0L 1T0
> CANADA
>
> "First, the clay told me what to do.
> Then, I told the clay what to do.
> Now, we co-operate."
> sam 1994
>
> HYPERLINK "http://www.ody.ca/~scuttell/"http://www.ody.ca/~scuttell/
> HYPERLINK "mailto:scuttell@ody.ca"scuttell@ody.ca
>
>
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.476 / Virus Database: 269.9.14/880 - Release Date: 29/06/2007
> 2:15 PM
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
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>
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>
>
Snail Scott on mon 2 jul 07
Date: Sat, 30 Jun 2007 15:57:04 -0400
From: Maid O'Mud
Subject: Oh Boy, brain fart
>...This morning
I checked out the kiln, figuring to unload and realized
DOH, I forgot to close the lid. Kiln had turned off
after over 20 hours getting to bisque temp. ARGH!
So, other than spending a ridiculous amount of money
on electricity, have I harmed either my kiln or my pots?
Nope. The pots on the bottom may very well have
reached an adequate bisque temperature, or even
a bit higher. Since the thermocouple is usually
in the middle of the kiln, it will read the
'average' temperature halfway between the 'almost
-room-temperature' top and the 'whatever-it-
reached' bottom.
Did the kiln shut down because the pyrometer
reached temperature, or because it took too long
and a timer or failsafe shut it down? If the pyro
shut it off, the 'average temp' that I mentioned
above will be relevant; i.e. top too cool and
bottom too hot. If a timer or failsafe shut it off,
then it may be similar, OR it may all be underfired.
Odds are that you got at least a minimum bisque in
most of the kiln, though possibly not as high as
you'd prefer either for clean burnout or for glaze
application by dipping.
Still, barring a too-high bisque at the bottom
(possible though not a strong likelihood), no harm
was done to your work or to the kiln. You could
just think of it as a 'nice, slow bisque' carried
to extremes.
I've forgotten to shut the lid, too, though for
an overglaze firing, not a bisque. By the time I
remembered, about three hours after loading, it
had hit temperature and was already cooling off.
-Snail
Arnold Howard on mon 2 jul 07
From: "Maid O'Mud"
This morning
> I checked out the kiln, figuring to unload and realized
> DOH, I forgot to close the lid. Kiln had turned off
> after over 20 hours getting to bisque temp. ARGH!
The kiln took 20 hours to fire with the lid vented. How long
does it normally take to fire with lid closed?
Did the pots on the top shelf get as hot as the pots in the
rest of the kiln?
I agree with Wayne and Cindy that you didn't hurt the kiln.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Jennifer Boyer on mon 2 jul 07
Hey Sam,
No worries about finding you can still do something "dumb" even with
all those years of experience behind you! I've been running a full
time studio since 1975 and I'm amazed at the endless ways I can still
screw up...my current favorite is doing intensive glaze testing and
forgetting to label a bucket or container. How can I still do this
when I know what a drag it is to discover a mystery glaze?? Beats me....
Welcome to the airhead club. You are in SUCH good company!
Jennifer
On Jun 30, 2007, at 3:57 PM, Maid O'Mud wrote:
>
> So, other than spending a ridiculous amount of money
> on electricity, have I harmed either my kiln or my pots?
> I've been a potter since the mid 80's, and this is a 1st.
> I honestly don't know the answer(s).
>
> TIA for any help or re-assurances.
>
> Sam Cuttell
> Maid O'Mud Pottery
> RR 1
> Melbourne, Ontario
> N0L 1T0
> CANADA
>
>
> ______________________________________________________________________
> ________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
*****************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
*****************************
Ron Roy on wed 4 jul 07
Hi Sam,
You might even have done some good. Elements like to be oxidized for longer
life and you probably burned all that accumulated carbon out of the bricks
as well.
Keep track of how many firings you get out of those elements - if you get
longer than normal life you may have ot do it that way evey once in a
while.
RR
>I fired my kiln slow bisque yesterday. I propped the lid
>on the provided metal slot and stayed in the studio
>all day happily listening to the clicks and buzzes.
>Then, apparently my brain turned off. I left the studio
>(went upstairs) and forgot about the kiln. This morning
>I checked out the kiln, figuring to unload and realized
>DOH, I forgot to close the lid. Kiln had turned off
>after over 20 hours getting to bisque temp. ARGH!
>
>So, other than spending a ridiculous amount of money
>on electricity, have I harmed either my kiln or my pots?
>I've been a potter since the mid 80's, and this is a 1st.
>I honestly don't know the answer(s).
>
>TIA for any help or re-assurances.
>
>Sam Cuttell
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
sacredclay on wed 4 jul 07
Welcome to the Brain Fart Club, Sam! Always glad to have a new member
come aboard. I have serious problems remembering directions (despite
where I've lived for 11 years, I still don't remember how to get to
downtown), people's names (and their faces!), and numbers. Give me ten
buckets of glazes to mix up and at least four or five of them will be
screwed up. I tell people I have a Memory Deficit Disorder (MDD)
There's no such thing as MDD, but it looks like I'm a doctor when I put
it after my name ;^P. It's probably due to my mispent youth, but that's
a whole another ball game!Don't worry about it, sweetie! You're not
alone!Brain Farters meet every third Tues. Or is it every second
Wednesday? I forget!
Kathryn in NC, MDD
Angela Davis on wed 4 jul 07
Thank you for that comment Ron, I know potters
who always fire, bisque or glaze, with all plugs in to conserve heat.
In the case of bisque the plugs are put in after the low cycle.
I had never heard of oxidizing elements for longer life and now have
a good reason to give comment on those plugged holes.
Angela Davis
In Homosassa, who usually doesn't remember to put the plugs in until after
the firing is over.
----- Original Message -----
From: "Ron Roy"
To:
Sent: Wednesday, July 04, 2007 12:44 AM
Subject: Re: Oh Boy, brain fart
> Hi Sam,
>
> You might even have done some good. Elements like to be oxidized for
> longer
> life and you probably burned all that accumulated carbon out of the bricks
> as well.
>
> Keep track of how many firings you get out of those elements - if you get
> longer than normal life you may have ot do it that way evey once in a
> while.
>
> RR
>
>>"I fired my kiln slow bisque yesterday. I propped the lid
>>on the provided metal slot ...
>>forgot about the kiln. .....
>>' Kiln had turned off
>>after over 20 hours getting to bisque temp. "
>>
>>So, other than spending a ridiculous amount of money
>>on electricity, have I harmed either my kiln or my pots?
.
>>
>>Sam Cuttell
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.476 / Virus Database: 269.9.14/885 - Release Date: 7/3/2007
> 10:02 AM
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