Gary & Carla Goldberg on wed 26 may 99
Hi - A friend of mine use to have an nanny living with her that was
interested in pottery. Well, the nanny went back to Germany a year ago
and I recently inherited her 2 bags of red clay. I have absolutely no
idea what cone to fire it to. There are no markings on the bag and the
girl was enrolled in a pottery class at a college or local studio.
Can anyone give me a ballpark estimate on what cone I should try it out
on?
- Carla who will be extruding this evening :)
leesa shearman on fri 28 may 99
dear carla
my advice to you is to test for plasticity, shrinkage and
absorption by firing test tiles at various temperatures.
Red clays in my experience are usually in the range of
cone 06 to cone 1...i have found personal success with my
particular red clay at cone 4!
i hope this helps you..have fun extruding.
Leesa Shearman
Toronto, Canada.
>From: Gary & Carla Goldberg
>Reply-To: Ceramic Arts Discussion List
>To: CLAYART@LSV.UKY.EDU
>Subject: cone temp for red clay?
>Date: Wed, 26 May 1999 13:02:58 EDT
>
>----------------------------Original message----------------------------
>Hi - A friend of mine use to have an nanny living with her that was
>interested in pottery. Well, the nanny went back to Germany a year ago
>and I recently inherited her 2 bags of red clay. I have absolutely no
>idea what cone to fire it to. There are no markings on the bag and the
>girl was enrolled in a pottery class at a college or local studio.
>
>Can anyone give me a ballpark estimate on what cone I should try it out
>on?
>
>- Carla who will be extruding this evening :)
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dave morrison on fri 28 may 99
you'd be best off to keep it in the low fire range. ive seen pure red art
go up into stone cones, but it doesnt take long for it to bubble, then sag,
and then become a nice big puddle in your kiln.
-----Original Message-----
From: Gary & Carla Goldberg
To: CLAYART@LSV.UKY.EDU
Date: Thursday, May 27, 1999 3:13 PM
Subject: cone temp for red clay?
>----------------------------Original message----------------------------
>Hi - A friend of mine use to have an nanny living with her that was
>interested in pottery. Well, the nanny went back to Germany a year ago
>and I recently inherited her 2 bags of red clay. I have absolutely no
>idea what cone to fire it to. There are no markings on the bag and the
>girl was enrolled in a pottery class at a college or local studio.
>
>Can anyone give me a ballpark estimate on what cone I should try it out
>on?
>
>- Carla who will be extruding this evening :)
>
NakedClay on sat 29 may 99
Hi Carla!
Since there are no markings on your bag of inherieted red clay, I suggest
sticking to a low-fire or mid-fire (up to cone 6) range for your clay. Most
of the red clays I've used are for these firing ranges.
You could also use the clay for making decorative slips, if your customary
firing temperature is above cone 6. Apply the slip to a test chip, made of
your clay of choice, to see if the slip can withstand a high-fire
environment.
I hope this is helpful.
Milton NakedClay@AOL.COM
Yucca Valley, CA
True to my moniker, the outside temperature is hot enough to play with clay
"au natural" today!
Heidrun Schmid on sat 29 may 99
Carla, just trhow a small pot with the clay and fire it at your normal
temperature, then see what happens, to protect the kilnshelf you could put
the glazed piece on an old shelf shard. Good luck Heidrun
Gary & Carla Goldberg wrote:
> ----------------------------Original message----------------------------
> Hi - A friend of mine use to have an nanny living with her that was
> interested in pottery. Well, the nanny went back to Germany a year ago
> and I recently inherited her 2 bags of red clay. I have absolutely no
> idea what cone to fire it to. There are no markings on the bag and the
> girl was enrolled in a pottery class at a college or local studio.
>
> Can anyone give me a ballpark estimate on what cone I should try it out
> on?
>
> - Carla who will be extruding this evening :)
Martin Howard on sat 29 may 99
Carla, the high end of Earthenware, red clay mixes in Britain, seems to
be cone 1 or 2 at the most. So if you go up to 01/1 you will probably be
OK.
I am referring to a well mixed, fairly fine grained, good throwing red
clay. Mine is mix of several Etruria Marls from the north west of
England.
Pity your bags have no markings. Perhaps that is one thing ClayArt can
follow up. We should let the manufacturers know that this kind of thing
can happen and demand that bags show temperature range and analysis for
that clay.
Martin Howard
Webbs Cottage Pottery and Press
Woolpits Road, Great Saling
BRAINTREE
Essex CM7 5DZ
01371 850 423
araneajo@gn.apc.org
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