Ric Swenson on thu 29 jan 98
CLAYARTERS !
Sorry, I must have been having another of those "senior moments" I
inadvertently referred to ULTROX as a brand name of Titania...when we ALL
know it SHOULD have been ZIRCONIA (DUH !)
(Thanks to Tom Buck for catching my error!)
My mind wandered , aimlessly, as it turns out, from the Rutile/Illmenite
(Titania) discussion to the question on ULTROX (Zirconia) with 'the ease
of a clay slip.'
I have corrected the information...please erase the previous , original
post from your collective memory banks....and forgive an over - stressed
old geezer ! My apologies.
Ric
>----------------------------Original message----------------------------
>Hi All -
>I have two items that I would like some help with if possible:
>
>1. SPANISH RED IRON OXIDE - is this a special type of iron oxide or will
>and red iron oxide be substituted with ease?
Spanish Red Iron Oxide is a standard type. Others may be just as good or
better.
a.k.a. Ferric Oxide Fe2O3
>
>2. ULTROX - What is it and where do you go to get it?
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Superpax, Zircopax, Ultrox, Opax, etc., are all BRAND NAMES for
ZIRCONIA , and ZIRCONIUM OXIDE or more commonly, ZIRCONIUM SILICATE is
used in ceramic glazes to opacify, or "make white", it is sometimes
substituted wholly , or in part, as a subsititute for TIN OXIDE ( which is
more expensive, but some think it "softer" white and less harsh than ZrO. )
Available at your local ceramic supply store. ( A white glaze might
contain 1-15 % opacifier such as Ultrox. )
BTW.... According to HAMER ... Zirconium Silicate has a PCE of 4622
degrees F. (2550 degrees C.) and with the addition of 10 % China Clay (eg.
EPK., in USA.) it can make an excellent Kiln Wash.
HTH
Ric
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From: Ric Swenson, ( home ) : P . O . Box 494
North Bennington, VT 05257 - 0494 U.S.A
Home telephone # ( 802 ) 447 - 4744
( work ) Bennington College, Route 67 - A
Bennington, Vermont, 05201 - 6001 USA
fon ( 802 ) 440 - 4621 ( fax 440 - 4582 )
e - mail: rswenson@bennington.edu
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"Outside a dog, a book is a man's best friend.
Inside a dog, it's too dark to read."
..............Groucho Marx
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