Snail Scott on tue 2 sep 03
At 07:47 AM 9/3/03 +1000, you wrote:
>I haven't been on this list long but there is lots of
>talk of chemical glazes. My teacher only uses
>'natural' glazes made from ash of plants. Does anyone
>else use these kind of glazes? The results are subtle
>and hey, 'natural'.
Ash IS a type of complex chemical, and most 'chemical
glazes' (as you call them) are made of natural minerals,
usually with minimal processing. Nothing wrong with ash
glazes; they are, as you say, often subtle and 'natural-
looking'. But not inherently more 'natural' in their
composition. Even frits are mainly just natural minerals,
carefully refined, measured, and pre-cooked, like (as
Lili(?) said) pre-made soup stock.
Most of those freaky-sounding materials like 'Nepheline
Syenite' and 'Wollastonite' and 'Bentonite' are just
fancy names for types of rocks, like 'Lhasa Apso' and
'Bichon Frise' are just fancy names for types of dogs.
Use what you like best, but there's a big wide world of
'natural' glaze types out there. You can even experiment
by digging your own, right out of the ground. Try a few!
-Snail
=?iso-8859-1?q?lance=20millward?= on wed 3 sep 03
I haven't been on this list long but there is lots of
talk of chemical glazes. My teacher only uses
'natural' glazes made from ash of plants. Does anyone
else use these kind of glazes? The results are subtle
and hey, 'natural'.
Lance.
--- iandol wrote: > Dear Steven
Goldate,
>
> We seem to be having an epidemic! Do you know the
> precise composition of your clay or is it a
> commercial product?
>
> I recently, in a private mail suggested changing
> techniques and adopting the High Bisque-Low Glaze
> option.
>
> If this is done it becomes possible to fire in
> saggars and use contoured setters to support fragile
> ware using a separator bed of pure fused alumina
> grain.
>
> If you are in control of body composition one
> solution is to reduce the amount of Felspar. another
> is to incorporate Molochite Grog. I would not
> recommend using Pitchers of identical composition
> since these would possible have a lower thermal
> activation temperature. I feel this would exaggerate
> the problem rather than cure it.
>
> Best regards,
>
> Ivor Lewis. Redhill, South Australia
>
>
______________________________________________________________________________
> 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.
http://mobile.yahoo.com.au - Yahoo! Mobile
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steve harrison on wed 3 sep 03
Lance,
glazes made from ground up rocks are also just as natural.
That makes up about 90% of all glaze ingredients.
Best wishes
Steve Harrison
Hot & Sticky Pty Ltd
5 Railway Pde
Balmoral Village
NSW 2571
Australia
http://ian.currie.to/sh/Steve_Harrisons_books.html
On Wednesday, September 3, 2003, at 07:47 AM, lance millward wrote:
> I haven't been on this list long but there is lots of
> talk of chemical glazes. My teacher only uses
> 'natural' glazes made from ash of plants. Does anyone
> else use these kind of glazes? The results are subtle
> and hey, 'natural'.
>
> Lance.
>
> --- iandol wrote: > Dear Steven
> Goldate,
>>
>> We seem to be having an epidemic! Do you know the
>> precise composition of your clay or is it a
>> commercial product?
>>
>> I recently, in a private mail suggested changing
>> techniques and adopting the High Bisque-Low Glaze
>> option.
>>
>> If this is done it becomes possible to fire in
>> saggars and use contoured setters to support fragile
>> ware using a separator bed of pure fused alumina
>> grain.
>>
>> If you are in control of body composition one
>> solution is to reduce the amount of Felspar. another
>> is to incorporate Molochite Grog. I would not
>> recommend using Pitchers of identical composition
>> since these would possible have a lower thermal
>> activation temperature. I feel this would exaggerate
>> the problem rather than cure it.
>>
>> Best regards,
>>
>> Ivor Lewis. Redhill, South Australia
>>
>>
> _______________________________________________________________________
> _______
>> 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.
>
> http://mobile.yahoo.com.au - Yahoo! Mobile
> - Check & compose your email via SMS on your Telstra or Vodafone
> mobile.
>
> _______________________________________________________________________
> _______
> 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 wed 3 sep 03
Hi Lance,
Your teacher does not know but all the glazes are made out of natural
source.
I use a combination of wood ash The Holy land soil German low fire
casting slip GB substitute from California and Belgian quartz.
Unfortunately most of these materials are not available where you live.
In any case you can see in my site some samples of the works and tests.
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
Ababi on wed 3 sep 03
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of steve
harrison
Sent: Wednesday, September 03, 2003 11:02 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: 'natural' Glazes
Lance,
glazes made from ground up rocks are also just as natural.
That makes up about 90% of all glaze ingredients.
Best wishes
Steve Harrison
===============================================
I want to add.
As a former painter: Even most acrylic paints the so over synthetic
ones, are made out of tar, another kind of liquid mineral.
Ababi
Craig Martell on wed 3 sep 03
Hi:
For the most part, I don't think that the term, "chemical", applies to
glazes and clays in the sense that chemicals are synthesized substances
that don't occur in nature. OK, I know this is really general but for our
purposes I think this is the case. The things that we use to make glazes
and claybodies are naturally occuring earth minerals and rocks. They are
ground up and processed but not actually altered from the natural
state. One exception to this would be lithium carbonate and there are
others mostly in the realm of coloring materials. Ceramic stains are
synthesized materials made from combined colorant oxides and other
minerals. My point is that just about all the stuff we use is "natural".
regards, Craig Martell Hopewell, Oregon
Janice M. Boyd on thu 4 sep 03
Hmmmm -- Glazes ARE chemicals...but then again, so are you and I.
And "natural" is not always equivalent to "safe" or "good for the
environment." Raw sewage is natural.
Ababi on thu 4 sep 03
I want to add to Craig, You are right, I don't remember if it has been
Hopper in Hopper Rhodes or Hopper in his own book that wrote that we are
not really doing chemistry - just cooking. I think he is right!
An answer to Lance's off list letter. It was not that privet:
---------------------------- Lance ---------------------------
>Wrong again! They are not natural because they come
>from minerals that are often toxic and are also in
>limited supply...not sustainable. A glaze made from
>bamboo ash, is however sustainable and low toxicity.
>I also not that a company in Japan has started making
>ceramic dishes from ground up plates which they make
>into recycled clay. I don't know how it works, but
>anything that is better for the environment I'm
>willing to try.
>Lance.
-------------------------- Ababi -------------------------
Wrong? Can I be wrong? DELETE!
I live in an agriculture community, I used straw and hay for raku
because of it's high smoke. In general making ash needs a lot of smoke!
I made once ash out of straw. 50 liter gave me about half cup of hay.
Will Bamboo be better? Can you supply hundreds of tons of bamboo's ash?
Can you glaze with this ash alone? How high? How much energy will be
needed? Do not "wrong" anyone before you know the facts! Not " I heard"
. If the environment is so important to you do not use it as the only
material. By the way, because of it's low poisonous, wear gloves or you
will regret. As for the plates you will reuse as an ingredient of
glazing you need as follow: mills ball mills very high fire.
Will you sing and dance around or you will need a lot of energy to
create something useful to pottery out of these plates?
As far as I know you can use these plates either for grog or to add them
as mosaic pieces to paperclay.
Before I go the last advise: Sell your car and adopt your donkey this
way you can recycle his energy leftovers, I even has it's analysis!-
... I must go now to feed my camel bye bye!
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 Craig
Martell
Sent: Wednesday, September 03, 2003 6:19 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: 'natural' Glazes
Hi:
For the most part, I don't think that the term, "chemical", applies to
glazes and clays in the sense that chemicals are synthesized substances
that don't occur in nature. OK, I know this is really general but for
our
purposes I think this is the case. The things that we use to make
glazes
and claybodies are naturally occuring earth minerals and rocks. They
are
ground up and processed but not actually altered from the natural
state. One exception to this would be lithium carbonate and there are
others mostly in the realm of coloring materials. Ceramic stains are
synthesized materials made from combined colorant oxides and other
minerals. My point is that just about all the stuff we use is
"natural".
regards, Craig Martell Hopewell, Oregon
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