Marcia Selsor on sat 12 jan 02
I know someone here can answer this. I am experimenting with some glazes
for sculptural pieces. I used some crater glazes with cryolite and
didn't notice anything bad happening to my kiln. But, recently I read
somewhere that cryolite can damage elements. Does anyone have opinions
on that. I know there are many opinions from this group.
Marcia in Montana
--
Marcia Selsor
selsor@imt.net
http://www.imt.net/~mjbmls
http://www.imt.net/~mjbmls/Tuscany2002.html
Ababi on sat 12 jan 02
I read it in Lana Wilson's book. Probably connected to the fluor
Ababi
---------- Original Message ----------
>I know someone here can answer this. I am experimenting with some glazes
>for sculptural pieces. I used some crater glazes with cryolite and
>didn't notice anything bad happening to my kiln. But, recently I read
>somewhere that cryolite can damage elements. Does anyone have opinions
>on that. I know there are many opinions from this group.
>Marcia in Montana
>--
>Marcia Selsor
>selsor@imt.net
>http://www.imt.net/~mjbmls
>http://www.imt.net/~mjbmls/Tuscany2002.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.
m markey on fri 25 jan 02
Hi Marcia and Others Who Favor Crators!
I've fired cryolite-based glazes for crater effects, and have not
encountered damage to the kiln elements, at cone 6.
One caveat: the cryolite glazes are sometimes "explosive" when the craters
form. Perhaps this is where your concern stems from. I suggest firing slowly
to the intended cone, to lessen the chance of getting "glaze splatter" over
the kiln shelves and other wares in the kiln. The best bet is to avoid
mixing cratered wares with non-cratered wares, in the same kiln load.
Best wishes!
Mohabee Nakedclay@hotmail.com
Yucca Valley, CA
I had "claybud" Bud over a week ago--he's got a garage studio in Orange
County, CA. We had a brief, but pleasant visit. He's on his way to Colorado,
via Phoenix, AZ, and other Southwest US cities.
_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx
Working Potter on tue 19 feb 02
WHEN TESTING SOME OF BEHRENS CRYOLITE GLAZES ,WE HAD SOME EXPLOSIVE EFFECTS
AND THE RESULTS GOT INTO THE CONE SETTER DEVICE AND TUBE AND OVERFIRED THE
KILN [NO LIMIT TIMER ON THAT ONE].
So do beware.
In a message dated 1/25/2002 11:28:19 AM Eastern Standard Time,
nakedclay@HOTMAIL.COM writes:
> caveat: the cryolite glazes are sometimes "explosive" when the craters
> form. Perhaps this is where your concern stems from. I suggest firing slowly
> to the intended cone, to lessen the chance of getting "glaze splatter" over
> the kiln shelves and other wares in the kiln. The best bet is to avoid
> mixing cratered wares with non-cratered wares, in the same kiln load.
>
>
Susan on sat 23 feb 02
does this apply to clay bodies that contain cryolite?
> From: Ababi
> Reply-To: ababisha@shoval.org.il
> Date: Sun, 24 Feb 2002 06:55:05 +0200
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: Cryolite and electric element?
>
> The Cryolite's Behrnses glazes, are extremes. he uses it in high
> amounts.
> When you test ANY of his "extreme" glazes keep them away from the
> elements or any other sensitive part of the kiln. It would be wise to
> make physical defence to your cone setter. Also do not fill the kiln
> with this glazes. The cryolite relieses poisons fumes of fluor, you
> better be away while the firing.
> My main word(s)
> Thank you, I knew it might damage the elements, did not know exactly
> what
> Ababi Sharon
> Kibbutz Shoval- Israel
> Glaze addict
> ababisha@shoval.org.il
> http://members4.clubphoto.com/ababi306910/
> http://www.milkywayceramics.com/cgallery/asharon.htm
> http://www.israelceramics.org/
>
>
>
>
> ---------- Original Message ----------
>
>> WHEN TESTING SOME OF BEHRENS CRYOLITE GLAZES ,WE HAD SOME
> EXPLOSIVE
>> EFFECTS
>> AND THE RESULTS GOT INTO THE CONE SETTER DEVICE AND TUBE AND
>> OVERFIRED THE
>> KILN [NO LIMIT TIMER ON THAT ONE].
>> So do beware.
>
>> In a message dated 1/25/2002 11:28:19 AM Eastern Standard Time,
>> nakedclay@HOTMAIL.COM writes:
>
>
>>> caveat: the cryolite glazes are sometimes "explosive" when the
> craters
>>> form. Perhaps this is where your concern stems from. I suggest
> firing
>> slowly
>>> to the intended cone, to lessen the chance of getting "glaze
>> splatter" over
>>> the kiln shelves and other wares in the kiln. The best bet is to
> avoid
>>> mixing cratered wares with non-cratered wares, in the same kiln load.
>>>
>>>
>
>> _______________________________________________________________________
> _
>> ______
>> 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.
>
Ababi on sun 24 feb 02
The Cryolite's Behrnses glazes, are extremes. he uses it in high
amounts.
When you test ANY of his "extreme" glazes keep them away from the
elements or any other sensitive part of the kiln. It would be wise to
make physical defence to your cone setter. Also do not fill the kiln
with this glazes. The cryolite relieses poisons fumes of fluor, you
better be away while the firing.
My main word(s)
Thank you, I knew it might damage the elements, did not know exactly
what
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
---------- Original Message ----------
>WHEN TESTING SOME OF BEHRENS CRYOLITE GLAZES ,WE HAD SOME
EXPLOSIVE
>EFFECTS
>AND THE RESULTS GOT INTO THE CONE SETTER DEVICE AND TUBE AND
>OVERFIRED THE
>KILN [NO LIMIT TIMER ON THAT ONE].
>So do beware.
>In a message dated 1/25/2002 11:28:19 AM Eastern Standard Time,
>nakedclay@HOTMAIL.COM writes:
>> caveat: the cryolite glazes are sometimes "explosive" when the
craters
>> form. Perhaps this is where your concern stems from. I suggest
firing
>slowly
>> to the intended cone, to lessen the chance of getting "glaze
>splatter" over
>> the kiln shelves and other wares in the kiln. The best bet is to
avoid
>> mixing cratered wares with non-cratered wares, in the same kiln load.
>>
>>
>_______________________________________________________________________
_
>______
>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 on sun 24 feb 02
The greatness of the cryolite is that this is a natural source of
unsoluble Na2O.
When Behrens made that glaze:
STONY FISSURED GLAZE ^6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cryolite 33.00
ULTROX 67.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 1.000 16.60%
Al2O3 0.333 9.09%
SiO2 1.514 24.36%
ZrO2 1.514 49.94%
Na2O 1.000 16.60%
Al:Si 4.54
Expan. 9.52
ST 330.92
He actualy with two materials covered all!
The Cryolite gave Sodium and alumina
the Zircon, ultrox gave whiteness and silica.
Yet it is a "very bad" glaze. it is unbalanced and fissured.
You can see it in my humble site.
It might break and pieces fly away. I found out that near the elements
it might "burn".
I do not think that in a claybody, or a glaze with normal amount it
might have problems. The fluor, might runaway during bisque.
To help you feel better I shall add here recipes (of glazes with
cryolite.
The main problem from my point of view is the high cost ( in israel) of
the cryolite.
ABABI'S GREEN GLAZE
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cryolite 20.00
SILICA 30.00
FRIT 3195 20.00
ZINC OXIDE 15.00
ENGLISH KAOLIN CC31 15.00
Nickel Oxide 2.00
Titanium Dioxide 5.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.422 10.58%
CaO 0.105 2.39%
ZnO 0.472 15.51%
Al2O3 0.323 13.30%
B2O3 0.168 4.72%
SiO2 1.991 48.32%
TiO2 0.160 5.17%
Na2O 0.422 10.58%
Al:Si 6.16
Expan. 9.75
ST 342.82
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Clay Body white or buff
Colour yellow green with tiny crystals-like
Without the TiO2 it is kind of crystaline glaze you would give to your
children students in a regular ^6 firing. make them fell they made
crystal glaze.
This one I sent before.
ABABI'S CONCRET FOR ^6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1220 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Portland Cement 22.00
Magnesium Carb Light 8.00
Borax 15.00
ENGLISH KAOLIN CC31 20.00
SILICA 15.00
Cryolite 20.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.321 14.19%
CaO 0.474 18.39%
MgO 0.205 5.70%
Al2O3 0.263 18.53%
B2O3 0.076 3.66%
SiO2 0.952 39.53%
K2O 0.019 1.24%
Na2O 0.302 12.95%
Al:Si 3.62
Expan. 11.40
ST 365.43
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Clay Body buff
Colour toward brown
Glaze Type
Opacity
Texture mottled
This one too
ABABI'S FRECKLES
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1220 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cryolite 30.00 From Greenland?
Cadycal (California) 15.00 USA
ENGLISH KAOLIN CC31 10.00 From England
SILICA 30.00 Israel?
ULTROX 15.00 New Zealand?
Cobalt Oxide 1.00 Congo?
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.761 15.87%
CaO 0.235 4.43%
MgO 0.004 0.05%
Al2O3 0.377 12.91%
B2O3 0.364 8.51%
SiO2 2.299 46.46%
ZrO2 0.284 11.76%
Na2O 0.761 15.87%
Al:Si 6.10
Expan. 10.35
ST 302.77
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
---------- Original Message ----------
>does this apply to clay bodies that contain cryolite?
>> From: Ababi
>> Reply-To: ababisha@shoval.org.il
>> Date: Sun, 24 Feb 2002 06:55:05 +0200
>> To: CLAYART@LSV.CERAMICS.ORG
>> Subject: Re: Cryolite and electric element?
>>
>> The Cryolite's Behrnses glazes, are extremes. he uses it in high
>> amounts.
>> When you test ANY of his "extreme" glazes keep them away from the
>> elements or any other sensitive part of the kiln. It would be wise to
>> make physical defence to your cone setter. Also do not fill the kiln
>> with this glazes. The cryolite relieses poisons fumes of fluor, you
>> better be away while the firing.
>> My main word(s)
>> Thank you, I knew it might damage the elements, did not know exactly
>> what
>> Ababi Sharon
>> Kibbutz Shoval- Israel
>> Glaze addict
>> ababisha@shoval.org.il
>> http://members4.clubphoto.com/ababi306910/
>> http://www.milkywayceramics.com/cgallery/asharon.htm
>> http://www.israelceramics.org/
>>
>>
>>
>>
>> ---------- Original Message ----------
>>
>>> WHEN TESTING SOME OF BEHRENS CRYOLITE GLAZES ,WE HAD SOME
>> EXPLOSIVE
>>> EFFECTS
>>> AND THE RESULTS GOT INTO THE CONE SETTER DEVICE AND TUBE AND
>>> OVERFIRED THE
>>> KILN [NO LIMIT TIMER ON THAT ONE].
>>> So do beware.
>>
>>> In a message dated 1/25/2002 11:28:19 AM Eastern Standard Time,
>>> nakedclay@HOTMAIL.COM writes:
>>
>>
>>>> caveat: the cryolite glazes are sometimes "explosive" when the
>> craters
>>>> form. Perhaps this is where your concern stems from. I suggest
>> firing
>>> slowly
>>>> to the intended cone, to lessen the chance of getting "glaze
>>> splatter" over
>>>> the kiln shelves and other wares in the kiln. The best bet is to
>> avoid
>>>> mixing cratered wares with non-cratered wares, in the same kiln
>load.
>>>>
>>>>
>>
>>>
>_______________________________________________________________________
>> _
>>> ______
>>> 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.
>>
>________________________________________________________________________
>______
>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.
iandol on mon 25 feb 02
Dear Susan,
Please excuse me for asking, but who is putting Sodium Aluminium =
Fluoride into their clay bodies? Has someone been recommending this? If =
they have, why do they wish to include it? I know some clays contain a =
natural proportion of Fluorite, Calcium Fluoride and this acts as a body =
flux.
I can understand it being used in glazes, for as D. Rhodes says, it is =
one of the few ways of incorporating Sodium in an insoluble form, though =
he warns that it will pit and spit.
There is a lot of Fluorine in the molecular composition, six atoms our =
of every ten ( Na3AlF6 ). With a melting point of 1000 deg Celsius it =
may have some useful qualities as replacement for other sodium frits or =
be used to augment other frits.
But I would be lothe to use it because of the respiratory hazard and the =
fact that the gas will react with water vapour in the atmosphere to form =
one of the most corrosive acids known, especially vicious when it =
contacts human flesh.
Best regards,
Ivor
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