Cindy Gatto on fri 30 mar 01
Hello all:
I am writing the list in hope of a little help. We have a
customer that wants us to do a single firing (bisque & glaze in one) to ^ 6.
Can this be done at our normal ^ 6 glaze firing cycle or does it need to be
done at a very slow rate? Any information would be greatly appreciated.
Thank you:
Mark & Cindy
The Mudpit
228 Manhattan Ave
Brooklyn NY 11206
718-218-9424
Mudpitnyc@aol.com
www.Mudpitnyc.com
mudlark on fri 30 mar 01
Though I fire to 03 I believe this should apply. In your firing cycle you are
doing a bisque as well as a glaze so it follows that you should use the same care
to get to bisque temp as before. You also have the crappola that needs to burn out
BEFORE the glaze starts to sinter therefore sealing in the crappola resulting in
blisters. Keep the lid propped to at least 1000F and leave the top spy out
throughout. A more open body works better whereas a smooth body will bloat. I use
something like Laguna's R2. Make sure the glazed piece are DRY before you load
them.
Check out my sight. The hummingbird feeder and the bird bath are once-fired.
Good Luck
Clyde Tullis
Mudlark Pottery
320 G Street
Salida, Colorado 81201
719-539-1299
mudlark@chaffee.net
mudlarkpottery.com
Cindy Gatto wrote:
> Hello all:
> I am writing the list in hope of a little help. We have a
> customer that wants us to do a single firing (bisque & glaze in one) to ^ 6.
> Can this be done at our normal ^ 6 glaze firing cycle or does it need to be
> done at a very slow rate? Any information would be greatly appreciated.
>
> Thank you:
> Mark & Cindy
> The Mudpit
> 228 Manhattan Ave
> Brooklyn NY 11206
> 718-218-9424
> Mudpitnyc@aol.com
> www.Mudpitnyc.com
>
> ______________________________________________________________________________
> 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.
--
Clyde Tullis
Mudlark Pottery
320 G Street
Salida, CO 81201
719-539-1299
mudlark@chaffee.net
http://www.mudlarkpottery.com
Dewitt on fri 30 mar 01
Why does the customer care?
deg
At 18:09 3/30/01 -0500, you wrote:
>Hello all:
> I am writing the list in hope of a little help. We have a
>customer that wants us to do a single firing (bisque & glaze in one) to ^ 6.
>Can this be done at our normal ^ 6 glaze firing cycle or does it need to be
>done at a very slow rate? Any information would be greatly appreciated.
>
>Thank you:
>Mark & Cindy
>The Mudpit
>228 Manhattan Ave
>Brooklyn NY 11206
>718-218-9424
>Mudpitnyc@aol.com
>www.Mudpitnyc.com
>
>______________________________________________________________________________
>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.
jcullen on fri 30 mar 01
I single-fire Porcelain at ^6.
After a lot of testing I have adjusted my glazes to withstand fast firing.
So, the only answer is to test, test, and test some more. It can be done
(firing along with glazed pieces that have been bisqued) but the single-fire
clay body and glazes used may react differently (even if it's the same clay
body and glazes used in the two-fire process. The amount of moisture
absorbed during glazing of the single-fire pots will be different. I would
suggest a long candling (2-3 hours just below 200F) before ramping up.
----- Original Message -----
From: "Cindy Gatto"
To:
Sent: Friday, March 30, 2001 5:09 PM
Subject: SINGLE FIRINGS(QUESTION)
> Hello all:
> I am writing the list in hope of a little help. We have a
> customer that wants us to do a single firing (bisque & glaze in one) to ^
6.
> Can this be done at our normal ^ 6 glaze firing cycle or does it need to
be
> done at a very slow rate? Any information would be greatly appreciated.
>
> Thank you:
> Mark & Cindy
> The Mudpit
> 228 Manhattan Ave
> Brooklyn NY 11206
> 718-218-9424
> Mudpitnyc@aol.com
> www.Mudpitnyc.com
>
>
____________________________________________________________________________
__
> 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.
Tommy Humphries on fri 30 mar 01
Hey Cindy...
The singlefire schedule should ideally combine the bisque and the glaze
firing times. Start out with your schedule for bisque, then after the
inversion soak, you can continue on with your glaze schedule. Usually this
will add 2-3 hours to a glaze firing. If you are certain that the ware is
bone dry, you might rush it a bit, but...I wouldn't advise pushing it too
fast.
Also... you might want to be sure that the glaze is suited for singlefiring,
as a glaze that is low on clay can have real problems with fit in a
singlefire, even if the fit is perfect on the same clay with a separate
bisque firing. This is due to the increased shrinkage of the clay relative
the glaze in a singlefire. You might want to test first.
Tommy Humphries
Photos here http://albums.photopoint.com/j/AlbumIndex?u=939179&a=6869600
----- Original Message -----
From: "Cindy Gatto"
To:
Sent: Friday, March 30, 2001 5:09 PM
Subject: SINGLE FIRINGS(QUESTION)
> Hello all:
> I am writing the list in hope of a little help. We have a
> customer that wants us to do a single firing (bisque & glaze in one) to ^
6.
> Can this be done at our normal ^ 6 glaze firing cycle or does it need to
be
> done at a very slow rate? Any information would be greatly appreciated.
>
> Thank you:
> Mark & Cindy
> The Mudpit
> 228 Manhattan Ave
> Brooklyn NY 11206
> 718-218-9424
> Mudpitnyc@aol.com
> www.Mudpitnyc.com
>
>
____________________________________________________________________________
__
> 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.
>
Karen Lookenott on fri 30 mar 01
Cindy,
It can be done on a normal medium speed glaze firing; however, your
customer should be told that the piece will craze eventually and that the
bisque is only soft fired.
Karen
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Cindy Gatto
Sent: Friday, March 30, 2001 6:10 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: SINGLE FIRINGS(QUESTION)
Hello all:
I am writing the list in hope of a little help. We have a
customer that wants us to do a single firing (bisque & glaze in one) to ^ 6.
Can this be done at our normal ^ 6 glaze firing cycle or does it need to be
done at a very slow rate? Any information would be greatly appreciated.
Thank you:
Mark & Cindy
The Mudpit
228 Manhattan Ave
Brooklyn NY 11206
718-218-9424
Mudpitnyc@aol.com
www.Mudpitnyc.com
____________________________________________________________________________
__
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.
ferenc jakab on sat 31 mar 01
> Hello all:
> I am writing the list in hope of a little help. We have a
> customer that wants us to do a single firing (bisque & glaze in one) to ^
6.
> Can this be done at our normal ^ 6 glaze firing cycle or does it need to
be
> done at a very slow rate? Any information would be greatly appreciated.
Cindy,
To 600 deg C fire the same as for bisque, after that fire normally.
Feri.
Paul Taylor on sat 31 mar 01
Dear Cindy
To add a warning to Tommy's advise - BEWARE if you biscuit fire you get
two goes at getting rid of the carbon . Although a raw kiln is not as
tightly pact. So if your pot is large or has a lid you may need to give a
little extra time between 750c to 900c. an hour extra well oxidized.
-- Regards from Paul Taylor
http://www.anu.ie/westportpottery
Those that live by rhetoric will lie by it
> From: Tommy Humphries
> Reply-To: Ceramic Arts Discussion List
> Date: Fri, 30 Mar 2001 18:46:58 -0600
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: SINGLE FIRINGS(QUESTION)
>
> Hey Cindy...
>
> The singlefire schedule should ideally combine the bisque and the glaze
> firing times. Start out with your schedule for bisque, then after the
> inversion soak, you can continue on with your glaze schedule. Usually this
> will add 2-3 hours to a glaze firing. If you are certain that the ware is
> bone dry, you might rush it a bit, but...I wouldn't advise pushing it too
> fast.
>
> Also... you might want to be sure that the glaze is suited for singlefiring,
> as a glaze that is low on clay can have real problems with fit in a
> singlefire, even if the fit is perfect on the same clay with a separate
> bisque firing. This is due to the increased shrinkage of the clay relative
> the glaze in a singlefire. You might want to test first.
>
> Tommy Humphries
>
> Photos here http://albums.photopoint.com/j/AlbumIndex?u=939179&a=6869600
>
>
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