Antoinette Badenhorst on tue 23 mar 04
Ellie, I use opacifiers on a regular basis. The ones that I use is Tin,
titanium diox and zirconium (I believe it is zircopax). It is
interesting to me that you say that one uses different ones in reduction
than in
electric kilns. I am kind of interested in clayarters discussing
opacifiers. I have a feeling that we (and I for sure) sometimes use them
wrong. I have two glazes that I mix from the same base glaze. In the one
I add titanium diox and we get a soft yellow from that. In the other one
I add tin, rutile and iron to get a rusty brown. This past week we've
changed the shade of the rusty glaze to a lighter (almost cinnamon)
color by taking out some of the iron. We also made a test that that
eliminates even more of the iron and ended up with a glaze similar to
the soft yellow that only contain titanium diox.
As far as I know rutile is a titanium/iron ore and titanium is
???something??? + iron. Tin is expensive and my feeling is that I can
replace the tin in the rusty recipe with titanium. If so, what will
happen if I replace it with zircopax?
I would love to make tests of all of these, but it will have to wait
till deep into the summer, since I am occupied till over my ears.
Thanks.
Antoinette Badenhorst
105 Westwood Circle
Saltillo MS
38866
662 869 1651
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ellie Blair
Sent: Tuesday, March 23, 2004 12:24 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Opacifiers.
----- Original Message -----
From: Antoinette Badenhorst
To: CLAYART@LSV.CERAMICS.ORG
Sent: Monday, March 22, 2004 9:30 PM
Subject: Opacifiers.
Hi Everybody. How many are there out there and how does one decide
which
opacifier to use.
There are several that fit into the opacifier category. It depends on
what cone you want to fire to, whether it is oxidation or reduction. It
sometimes makes a difference not always. Here are some well know ones,
zircopax, ultrox, opax these are fritted opacifiers. If you want
something that is not fritted you might try titanium dioxide depending
on what you want to do.
Hope this helps a little.
Ellie Blair
Blair Pottery
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