Antoinette Badenhorst on mon 22 mar 04
Hi Everybody. How many are there out there and how does one decide which
opacifier to use.
Also, are there some out under different names?
Thanks.
Antoinette Badenhorst
105 Westwood Circle
Saltillo MS
38866
662 869 1651
Paul Lewing on tue 23 mar 04
There are three main oxides that are used as opacifiers: zirconium, tin, and
titanium, although bone ash in small amounts also will opacify a glaze, but
that's not all it does.
Ultrox, Zircopax, Opax, Superpax, Tampax (wait, not that last one!) are all
brand names of zirconium compounds. One of them (and I never can remember
which on) is zirconium oxide; the rest are zirconium silicate. If all
you're doing is making a glaze white and unvariegated, zirconium will do it.
If you want a bathtub white, this is what you're looking for. It's the
cheapest opacifier.
Tin oxide will produce a mellower white if you're just opacifying a white
glaze, and will produce a warmer white than zirconium. It also has a
different effect on some colors than zirconium, particularly iron.
Titanium, whether pure in the form of titanium dioxide, or in the form of
rutile (which is theoretically 92% TiO2, and 8% iron) both opacifies and
breaks up the surface, producing microcrystals.
Which one is best? As usual, it depends.
Paul Lewing, Seattle
Ababi Sharon on tue 23 mar 04
Hello Antoinette.
I use ultrox
Tin
Titanium
I use ultrox because it has "sharp white" that I love.
Also because it costs me half than tin (though you need it double
amount)
I use tin for it softness
I use tin for CTR or TCR.
Both are giving turquoise with copper. The first sharp while the second
soft.
When I use titanium it colorized the oxides. I got softer green out of
my turquoise; I got grass green out of my blue using nickel and blue
green from cobalt. and I might nave mottling effect.
Years ago my supplier got zircopax.
I had mottling effect. He changed to ultrox and when I complained that I
lost the mottling effect told me it was just the different grinding. I
do not no what was the reason however I stopped using that glaze.
Ababi Sharon
Glaze wizard
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
A fast link Ceramics forum in Hebrew:
http://www.botzpottery.co.il/kishurim.html
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Antoinette
Badenhorst
Sent: Tuesday, March 23, 2004 5:31 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Opacifiers.
Hi Everybody. How many are there out there and how does one decide which
Ellie Blair on tue 23 mar 04
----- Original Message -----=20
From: Antoinette Badenhorst=20
To: CLAYART@LSV.CERAMICS.ORG=20
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
Antoinette Badenhorst on tue 23 mar 04
Ababi, so are you saying that ultrox and zircopax is the same thing?
Also is ultrox just a weaker form of tin, or what makes it act the same?
Antoinette Badenhorst
105 Westwood Circle
Saltillo MS
38866
662 869 1651
www.clayandcanvas.com
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ababi
Sharon
Sent: Tuesday, March 23, 2004 10:38 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Opacifiers.
Hello Antoinette.
I use ultrox
Tin
Titanium
I use ultrox because it has "sharp white" that I love.
Also because it costs me half than tin (though you need it double
amount)
I use tin for it softness
I use tin for CTR or TCR.
Both are giving turquoise with copper. The first sharp while the second
soft.
When I use titanium it colorized the oxides. I got softer green out of
my turquoise; I got grass green out of my blue using nickel and blue
green from cobalt. and I might nave mottling effect.
Years ago my supplier got zircopax.
I had mottling effect. He changed to ultrox and when I complained that I
lost the mottling effect told me it was just the different grinding. I
do not no what was the reason however I stopped using that glaze.
Ababi Sharon
Glaze wizard
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
A fast link Ceramics forum in Hebrew:
http://www.botzpottery.co.il/kishurim.html
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Antoinette
Badenhorst
Sent: Tuesday, March 23, 2004 5:31 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Opacifiers.
Hi Everybody. How many are there out there and how does one decide which
________________________________________________________________________
______
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.
Snail Scott on tue 23 mar 04
I find that most of the zirconium opacifiers
(Zircopax (old and new), Superpax, Ultrox,
Opax and the like) are similar enough for my
purposes that I just use whichever my current
supplier has in stock.
People with established production designs are
justifiably fussier, as the chemical and/or
manufacturing differences between opacifiers
can actually make a glaze look slightly
different than the same glaze made with another
brand.
For my purposes, however, which do not demand
precise repeatability in glazes, any of the
above products can be effectively substituted
for any other. In fact, although my container
says 'Superpax', that's probably not what's
mostly in it. I don't find the difference to be
enough to justify a separate container, or even
to bother relabeling the one I've got.
Feel free to have higher standards than mine!
-Snail
Ababi Sharon on wed 24 mar 04
Where I live ultrox and zircopax are the same.
These are Zircon silicates
From The Magic Of Fire (Tony Hansen)
Ultrox is
ZrO2...... 65.00%
SiO2...... 35.00%
Zircopax
ZrO2...... 67.21%
SiO2...... 32.79%
There is another material .Synthetic called: ZIRCONIUM SPINEL
Which is
ZnO....... 22.20%
ZrO2...... 33.60%
Al2O3..... 27.82%
SiO2...... 16.39%
I would not use this one with chrome tin stains but adding to it 1-2
nickel would make lovely blue and 5 more titanium into a grass green -
in a balanced glaze.
There are some more but this is the time to go to work.
Ababi
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Antoinette
Badenhorst
Sent: Tuesday, March 23, 2004 9:32 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Opacifiers.
Ababi, so are you saying that ultrox and zircopax is the same thing?
Also is ultrox just a weaker form of tin, or what makes it act the same?
Antoinette Badenhorst
105 Westwood Circle
Saltillo MS
38866
662 869 1651
www.clayandcanvas.com
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ababi
Sharon
Sent: Tuesday, March 23, 2004 10:38 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Opacifiers.
Hello Antoinette.
I use ultrox
Tin
Titanium
I use ultrox because it has "sharp white" that I love.
Also because it costs me half than tin (though you need it double
amount)
I use tin for it softness
I use tin for CTR or TCR.
Both are giving turquoise with copper. The first sharp while the second
soft.
When I use titanium it colorized the oxides. I got softer green out of
my turquoise; I got grass green out of my blue using nickel and blue
green from cobalt. and I might nave mottling effect.
Years ago my supplier got zircopax.
I had mottling effect. He changed to ultrox and when I complained that I
lost the mottling effect told me it was just the different grinding. I
do not no what was the reason however I stopped using that glaze.
Ababi Sharon
Glaze wizard
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
A fast link Ceramics forum in Hebrew:
http://www.botzpottery.co.il/kishurim.html
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Antoinette
Badenhorst
Sent: Tuesday, March 23, 2004 5:31 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Opacifiers.
Hi Everybody. How many are there out there and how does one decide which
________________________________________________________________________
______
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.
________________________________________________________________________
______
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.
Ivor and Olive Lewis on wed 24 mar 04
Dear Antoinette,
My suggestion is to have a look under the heading of Opacifier in
Hamer's Dictionary.
The substance many people ignore, and hence are unsure about
employing, is Air, otherwise thought of as Voids or Bubbles which
create optical opacity. The other, which Hamer speaks of is that of
immiscible liquids, that is a glaze which separates into two distinct
phases during cooling.
Have fun with your tests.
Best regards,
Ivor Lewis. Redhill, South Australia
David Hewitt on thu 25 mar 04
As others have said, tin oxide and titanium are two of the main
opacifiers. The interesting thing is the colour response that you can
get with combinations of these two opacifiers when used with any of the
normal colouring oxides, cobalt, RIO, nickel oxide, copper oxide and
chrome oxide.
Some years back we, Mike Bailey and me, did some tests on a base glaze
to illustrate this. The results can be seen on my web site if anyone is
interested.
http://www.dhpot.demon.co.uk
Select Opacifier Test Series under Pottery Techniques in the Contents
David
--
David Hewitt
David Hewitt Pottery
South Wales UK
Web:- http://www.dhpot.demon.co.uk
Ababi Sharon on thu 25 mar 04
Yesterday I sent to a fellow clayarter this Recipe of Eduard B.
Sorel Blue
Cone 04
E.P.kaolin 20%
Frit #3134 78%
Bentonite 2%
Zircopax 18%
Cobalt carbonate 4%
It is a beautiful blue over a red claybody if I remember correctly.
This recipe can be a touchstone to the subject we deal.
Will 9 tin make the same glaze?
Titanium? How much? Will it make it into the "Swamps of Florida green"?
It is an interesting starting point to the 04^ potters.
Ababi Sharon
Glaze wizard
Kibbutz S
hoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
A fast link Ceramics forum in Hebrew:
http://www.botzpottery.co.il/kishurim.html
Edouard Bastarache Inc. on thu 25 mar 04
If some want pictures of this glaze, I can send or
Mel may post them on Clayart.Html.
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
http://www.digitalfire.com/education/toxicity/
----- Original Message -----
From: "Ababi Sharon"
To:
Sent: Thursday, March 25, 2004 7:40 AM
Subject: Re: Opacifiers.
> Yesterday I sent to a fellow clayarter this Recipe of Eduard B.
> Sorel Blue
> Cone 04
> E.P.kaolin 20%
> Frit #3134 78%
> Bentonite 2%
> Zircopax 18%
> Cobalt carbonate 4%
> It is a beautiful blue over a red claybody if I remember correctly.
> This recipe can be a touchstone to the subject we deal.
> Will 9 tin make the same glaze?
> Titanium? How much? Will it make it into the "Swamps of Florida green"?
> It is an interesting starting point to the 04^ potters.
>
> Ababi Sharon
> Glaze wizard
> Kibbutz S
> hoval Israel
> ababisha@shoval.org.il
> http://ababi.active.co.il
> http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
> A fast link Ceramics forum in Hebrew:
> http://www.botzpottery.co.il/kishurim.html
>
>
____________________________________________________________________________
__
> 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.
>
Ababi Sharon on fri 26 mar 04
Yes please I want to offer it to my Hebrew list
Can you send me the other pictures you have had in "The Mining
Company"?
By the way, I tried this recipe a long time ago and I searched for it
the day before I posted it to the list I found the recipe in a
"ceramics" site. It looked like they copied it directly from "About Com"
or from Ceramics Today.
Steven Goldate removed from his list the poisonous and wrong glazes I
mean ^7 glaze that had been characterized as ^03 glazes (after I had
asked him. But this list just copied. (... Now I must add a warning
about the cryolite to the recipes I have sent him.)
Here is a beautiful ^7 glaze (Was successful at 1240C where I had
learnt)
Mossy Green
Cone 03
Oxidation
Potash Feldspar 33
Whiting 34
Kaolin 30
Cobalt Carbonate 1.3
Red Iron Oxide 4.0
If anyone will tell me has made it in ^03 I will fire my kiln!
The site is
http://ceramics.lifetips.com/TipSC.asp__Q__id__E__61941
You can ask the guru a question
See below each glaze!
You might learn something new. I will ask about this glaze and will send
you the response.
Ababi Sharon
Glaze wizard
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://ababi.active.co.il
http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
A fast link Ceramics forum in Hebrew:
http://www.botzpottery.co.il/kishurim.html
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Edouard
Bastarache Inc.
Sent: Thursday, March 25, 2004 7:19 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Opacifiers.
If some want pictures of this glaze, I can send or
Mel may post them on Clayart.Html.
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
http://www.digitalfire.com/education/toxicity/
----- Original Message -----
From: "Ababi Sharon"
To:
Sent: Thursday, March 25, 2004 7:40 AM
Subject: Re: Opacifiers.
> Yesterday I sent to a fellow clayarter this Recipe of Eduard B.
> Sorel Blue
> Cone 04
> E.P.kaolin 20%
> Frit #3134 78%
> Bentonite 2%
> Zircopax 18%
> Cobalt carbonate 4%
> It is a beautiful blue over a red claybody if I remember correctly.
> This recipe can be a touchstone to the subject we deal.
> Will 9 tin make the same glaze?
> Titanium? How much? Will it make it into the "Swamps of Florida
green"?
> It is an interesting starting point to the 04^ potters.
>
> Ababi Sharon
> Glaze wizard
> Kibbutz S
> hoval Israel
> ababisha@shoval.org.il
> http://ababi.active.co.il
> http://www.matrix2000.co.nz/Matrix%20Demo/Ababi.htm
> A fast link Ceramics forum in Hebrew:
> http://www.botzpottery.co.il/kishurim.html
>
>
________________________________________________________________________
____
__
> 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.
>
________________________________________________________________________
______
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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