Craig Martell on sun 26 nov 00
Hi:
I'm not a guru but I'll tell you what I use. Alcoa A-12 Alumina
Oxide. This stuff is 325 mesh and finer. Since it is so fine it is easier
to suspend and mix into a glaze. I use it mostly in Shinos and I have a
very nice fused red shino that has 40% alumina oxide. The best way to go
is to do some very systematic tests with glazes and additions of alumina
ox. Not all glazes will fuse as well as others.
regards, Craig Martell in Oregon
Chris Schafale on sun 26 nov 00
Hi guys,
There are times when I want a bit more alumina in a glaze, but I
don't want more clay. Is there any reason (other than cost) NOT to
use alumina hydrate under these circumstances? Thanks for your
insights.
Chris
Ababi Sharon on sun 26 nov 00
I wish I was a glaze guru!
I smoke A. hydrate, smells great!
If it is a decorative piece there is not any reason why not to use it, My
adviser told me, I did not go to deep in checking it, that the hydrate, make
kind of bubbles in the glaze. which makes the results of using it - instead
the alumina oxide - softer.I add up to 10% if needed
Ababi Sharon
ababisharon@hotmail.com
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/index.html
* * * * * * * *
www.photoisland.com
ID: sharon@shoval.org.il
Password:clay
----- Original Message -----
From: "Chris Schafale"
To:
Sent: Sunday, November 26, 2000 5:31 PM
Subject: Glaze gurus: alumina hydrate?
> Hi guys,
>
> There are times when I want a bit more alumina in a glaze, but I
> don't want more clay. Is there any reason (other than cost) NOT to
> use alumina hydrate under these circumstances? Thanks for your
> insights.
>
> Chris
>
>
____________________________________________________________________________
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> Send postings to clayart@lsv.ceramics.org
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melpots@pclink.com.
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Ron Roy on sun 26 nov 00
Hi Chris,
I have used it in glazes - so has Craig Martel. Useful when making Shino's
- you just gave to realize - as a relatively pure form of alumina - it's
hard to melt - so you can expect it to make your glaze hard to melt - fast.
Get the finest grind you can find.
RR
>There are times when I want a bit more alumina in a glaze, but I
>don't want more clay. Is there any reason (other than cost) NOT to
>use alumina hydrate under these circumstances? Thanks for your
>insights.
>
>Chris
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
Tom Buck on sun 26 nov 00
yes, it is tough to get alumina hydrate to disperse uniformly, and often
the particle (mesh) is too large for glaze-making, and hence the Al2O3.H2O
settles like a stone, again making for a non-uniform mix. and besides, you
want to use a clayey material to help suspend the other non-clay
materials. eg, epk, bento, pyrophyl. etc.
peace. Tom B.
Tom Buck ) tel: 905-389-2339
(westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street,
Hamilton ON L8T 3E1 Canada
On Sun, 26 Nov 2000, Chris Schafale wrote:
> Hi guys,
>
> There are times when I want a bit more alumina in a glaze, but I
> don't want more clay. Is there any reason (other than cost) NOT to
> use alumina hydrate under these circumstances? Thanks for your
> insights.
>
> Chris
>
> ______________________________________________________________________________
> 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.
>
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