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calcined zinc oxide

updated tue 19 jan 99

 

Margaret Monsour on fri 15 jan 99

I'm having a hard time locating a supplier for calcined zinc oxide. Does
anyone have a suggestion. I live in Denver and have tried mile high
ceramics and laguna. If you can help, please email me with the suppliers
phone number. My students' and I are testing macrocrystiline glaze
recipes.

thanks,
margaret monsour

Betsy C. Tanzer on sat 16 jan 99

You can make your own calcined zinc.....just put some zinc oxide into a
bisqued bowl and fire with your greenware pots to your bisque
temperature....cone 07 - 04. The bisque firing will calcine the zinc and all
you have to do to maintain it is to store it in a glass container with a
cover. Plastic will not work. (The plastic will eventually allow the zinc to
reabsorb moisture from the atmosphere.)
Betsy

Jeff Lawrence on sun 17 jan 99

Ms. Mansour was asking about calcined zinc oxide.

I get it for a painfully high price from New Mexico Clay Co (aka Ceramic King)
http://www.nmclay.com. On the bright side, a high price per pound means
your shipping is proportionately a lot less.

The calcined version appears to mitigate pinholing by comparison to regular
old fluffy zinc oxide.

Jeff
Jeff Lawrence
jml@sundagger.com
Sun Dagger Design
Rt. 1 Box 394L
Espanola, NM 87532
vox/fax 505-753-5913

Sheilah Bliss on sun 17 jan 99


In a message dated 1/15/99 10:02:04 AM, Margaret_Monsour@ceo.cudenver.edu
writes:

<anyone have a suggestion. I live in Denver and have tried mile high
ceramics and laguna. If you can help, please email me with the suppliers
phone number. My students' and I are testing macrocrystiline glaze
recipes.

thanks,
margaret monsour
>>

Hi Margaret -
Seattle Pottery Supply has calcined zinc oxide:
$2.95/lb, $16.50/10 lb, $57.00/50lb.
Phone #: 1-800-522-1975.
Address: 35 S. Hanford Seattle, WA 98134

Sheilah Bliss
Bliss Pottery

Dale A. Neese on sun 17 jan 99

I have always put what ingredients I need calcined in a very large, heavy,
thick, bisqued bowl and fired in the bisque kiln to red heat or about 1650F.
Just don't unload the bowl until completely cold, it tends to hold the heat
longer than anything in the kiln.
Dale Tex
-----Original Message-----
From: Margaret Monsour
To: CLAYART@LSV.UKY.EDU
Date: Friday, January 15, 1999 12:01 PM
Subject: Calcined Zinc Oxide


>----------------------------Original message----------------------------
>I'm having a hard time locating a supplier for calcined zinc oxide. Does
>anyone have a suggestion. I live in Denver and have tried mile high
>ceramics and laguna. If you can help, please email me with the suppliers
>phone number. My students' and I are testing macrocrystiline glaze
>recipes.
>
>thanks,
>margaret monsour
>

Lori Pierce on sun 17 jan 99

Here you are Margaret, tho there may be a much closer source of calcined
zinc oxide; Baily Ceramic Supply. 1-800-431-6067. PO 1577, Kingston, New
york 12402 Good luck from Lori in New Port Richey, Fl. oh yeah, $2.15 a
pound; $1.95 per pound for five pounds.
-----Original Message-----
From: Margaret Monsour
To: CLAYART@LSV.UKY.EDU
Date: Saturday, January 16, 1999 12:35 PM
Subject: Calcined Zinc Oxide


>----------------------------Original message----------------------------
>I'm having a hard time locating a supplier for calcined zinc oxide. Does
>anyone have a suggestion. I live in Denver and have tried mile high
>ceramics and laguna. If you can help, please email me with the suppliers
>phone number. My students' and I are testing macrocrystiline glaze
>recipes.
>
>thanks,
>margaret monsour

Brad Sondahl on sun 17 jan 99

Calcined zinc is not necessary for macrocrystalline glazes.
Visit my page for recipes and instructions on
macrocrystalline glazes. I use uncalcined zinc from Minn
Clay.

--
Brad Sondahl
Sondahl homepage http://www.camasnet.com/~asondahl/
Brad's Index
http://www.camasnet.com/~asondahl/bradindex.html
Contributing to the potluck of the WWW

david p george on mon 18 jan 99

Greetings! Can anyone clarify the ZnO question? Should one always use
calcined ZnO?
Some recipes specify "calcined" ZnO and others do not. My ZnO is in a
plastic bucket and is old. I gather that I should assume that it is not
calcined now if it ever was. My understanding is that ZnO is hydroscopic
and absorbs moisture (especially here in Washington!) and therefore the
ZnO content per gram is variable depending on the amount of absorbed
H2O. Maybe I answered my own question?

Dave, trying to keep dry here in wet Olympia.
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