Paul Lewing on tue 16 sep 03
on 9/16/03 1:50 PM, Edouard Bastarache at edouardb@SOREL-TRACY.QC.CA wrote:
> you may replace 1 part of tin oxide by 2 parts of
> zirconium silicate (Zircopax, Ultrox, etc.).
Maybe. As always, it depends.
If you're just opacifying a white glaze, it may not make much difference.
Tin oxide tends to make a richer, more mellow white than zirconium.
Zirconium makes a harsher flatter white. Zirconium is much cheaper, so if
what you're looking for is a bathtub white, go with it.
And keep in mind that Edouard's statement above is presumably a formula for
equal opacifying power. But there is no "right" amount of any material in
any glaze. It's all dependent on what you like.
Also, while zirconium compounds and tin oxide both opacify, tin does some
other things that zirconium does not.
If you're making a chrome/tin pink, it needs to be tin.
If you're making a copper red, it needs to be tin.
And if you're using iron in oxidation, tin will make a very much warmer
shade of brown than zirconium will.
Incidentally, titanium dioxide will also work as an opacifier, but it will
also have its own particular effect on color and surface quality.
Paul Lewing, Seattle
julie milazzo on tue 16 sep 03
Also, if zircopax can replace tin, in what proportion? This is for a cone ten glaze, lightly reduced, called Grey Bird. I'm doing a huge (for me) show in Greenville, SC this weekend, and really need to get this puppy made today, but of course, didn't plan ahead. I can borrow some tin from Heather Bosworth, but she is very VERY pregnant, and I'd hate to bother her over six ounces...
Anyway, I would appreciate any responses from any of you, and hope to see a few of you clay freaks this weekend at the show! Jules
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Ababi on tue 16 sep 03
Zircon Silicate: Ultrox, Zircopax. Can be substitute for tin.
I add about twice of the tin- still half in cost.
Because of the SiO2 it is kind of shinier than the tin. While
recalculating glazes from tin to ultrox I remove some of the SiO2 in the
recipe, if I do not want the extra shine.
From http://www.matrix2000.co.nz/MaterialsWeb/
Mol. Weight: 183.28
Fill Oxides ZrO2
Molecular Analysis:
SiO2 1.000
ZrO2 1.000
=20
Percentage Analysis
32.77 % SiO2=20
67.23 % ZrO=20
More in
http://www.digitalfire.ab.ca/cermat/material/1724.php
and http://www.digitalfire.ab.ca/cermat/material/index.php?goto=3DZ
If it is a glaze needs the tin to colorize another oxide, like copper
or Chrome - you cannot substitute the tin for ultrox.
=20
How it is in ^10 redu? I do not know. It is not a flux.
=ED
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of julie
milazzo
Sent: Tuesday, September 16, 2003 6:04 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Can zircopax be substituted for tin oxide? Also Greenville, SC
Also, if zircopax can replace tin, in what proportion? This is for a
cone ten glaze, lightly reduced, called Grey Bird. I'm doing a huge (for
me) show in Greenville, SC this weekend, and really need to get this
puppy made today, but of course, didn't plan ahead. I can borrow some
tin from Heather Bosworth, but she is very VERY pregnant, and I'd hate
to bother her over six ounces...
Anyway, I would appreciate any responses from any of you, and hope
to see a few of you clay freaks this weekend at the show! Jules
---------------------------------
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Yahoo! SiteBuilder - Free, easy-to-use web site design software
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Louis Katz on tue 16 sep 03
Depends on the glaze if the substitution will work. Its not the same,
kind of like crisco and butter. I would say a bit more zircopax than
tin. I would borrow it. Bring your friend a frozen meal for after the
baby is born and borrow the tin.
Louis
On Tuesday, September 16, 2003, at 11:04 AM, julie milazzo wrote:
> jamzzo@YAHOO.COM
Edouard Bastarache on tue 16 sep 03
Hello,
you may replace 1 part of tin oxide by 2 parts of
zirconium silicate (Zircopax, Ultrox, etc.).
Later,
"Ils sont fous ces Quebecois"
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
Tony Hansen on wed 17 sep 03
Check here:
http://www.digitalfire.ab.ca/cermat/ceramicmaterials/material.php?id=1642
There is a detailed discussion of the differences.
-------8<--------
Also, if zircopax can replace tin, in what proportion? This is for a cone ten glaze, lightly reduced, called Grey Bird. I\'m doing a huge (for me) show in Greenville, SC this weekend, and really need to get this puppy made today, but of course, didn\'t plan ahead. I can borrow some tin from Heather Bosworth, but she is very VERY pregnant, and I\'d hate to bother her over six ounces...
Anyway, I would appreciate any responses from any of you, and hope to see a few of you clay freaks this weekend at the show! Jules
---------------------------------
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
______________________________________________________________________________
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.
--------
Tony Hansen, Digitalfire Corp.
Edouard Bastarache on wed 17 sep 03
Hello Paul,
this substitution comes from the late James Chappell's book.
I presume he tried it in a variety of different glazes.
Later,
"Ils sont fous ces Quebecois"
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
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