James Jenigen on tue 2 may 00
Wondered if anyone can tell me how durable an orange peel glaze is. They
have a beautiful texture but almost look like they are made of tiny air
bubbles. What exactly causes the texture? How well do they stand up to
bumps and bangs?
Thanks
Craig Martell on wed 3 may 00
Hi:
>Wondered if anyone can tell me how durable an orange peel glaze is. They
>have a beautiful texture but almost look like they are made of tiny air
>bubbles. What exactly causes the texture? How well do they stand up to
>bumps and bangs?
Not without seeing the receipe and converting it to the seger
formula. Clairvoyance just doesn't work too well with glaze chem. Even if
it looks durable on paper, if it contains any potentially toxic oxides you
need to have it tested to be sure. One needs to look at the molecular
level of the fluxes, alumina, and silica to determine the probability of
balance and durability. The intended firing temp is important too.
These glazes are usually very high in Calcium, which will promote the
texture thing.
later, Craig Martell in Oregon
iandol on thu 4 may 00
------------------
Subject: Orange Peel Glaze
James Jenigen wrote
----------------------------Original message-------------------------
Wondered if anyone can tell me how durable an orange peel glaze is.
Good question. In spite of having collected writings about salt glazing from=
the
industrial information base I have never read anything about the durability =
of
Salt or Soda glaze. If someone were able to get analyses of typical films of
glaze I am sure a difinitive answer would be found very quickly. I have =
samples
which have been weathering for about fifteen years in full sunshine with =
about
thirteen inches of rain a year and they do not seem to change. But it is a
sodium compound and as such, will have a measurable solubility.
Perhaps a more important question relates to the willingness of the ceramics
community to accept this primitive way of creating a glaze because of it=92s
aesthetic value without every commenting on its durability, then they scream
blue murder about leaching of well thought out and designed compositions =
which
meet recognised technical criteria. Do I detect a hint of hypocrisy.
Ivor. Nor do I believe that hydrochloric acid forms as the first product at =
the
temperatures we work at when salt is thrown into the kiln. Add that to your =
list
of myths.
Jean Todd on fri 5 may 00
In Australia long before plastic pipes came along our sewer pipes were made
of terracotta clay fired with salt glaze to make them waterproof. Surely all
the ????? that went through sewer pipes would test this salt glaze to its
limits? They certainly lasted well. Hope the plastic do as well.
Jean
"Lang may your lum reek"
E-mail mallyree@ix.net.au
----- Original Message -----
From: "iandol"
To:
Sent: Friday, May 05, 2000 4:14 AM
Subject: Re: Orange Peel Glaze
----------------------------Original message----------------------------
------------------
Subject: Orange Peel Glaze
James Jenigen wrote
----------------------------Original message-------------------------
Wondered if anyone can tell me how durable an orange peel glaze is.
Good question. In spite of having collected writings about salt glazing from
the
industrial information base I have never read anything about the durability
of
Salt or Soda glaze. If someone were able to get analyses of typical films of
glaze I am sure a difinitive answer would be found very quickly. I have
samples
which have been weathering for about fifteen years in full sunshine with
about
thirteen inches of rain a year and they do not seem to change. But it is a
sodium compound and as such, will have a measurable solubility.
Perhaps a more important question relates to the willingness of the ceramics
community to accept this primitive way of creating a glaze because of it's
aesthetic value without every commenting on its durability, then they scream
blue murder about leaching of well thought out and designed compositions
which
meet recognised technical criteria. Do I detect a hint of hypocrisy.
Ivor. Nor do I believe that hydrochloric acid forms as the first product at
the
temperatures we work at when salt is thrown into the kiln. Add that to your
list
of myths.
JazNOTJazz@AOL.COM on thu 18 may 00
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From: JazNOTJazz@aol.com
Full-name: JazNOTJazz
Message-ID: <78.56657c4.2654be00@aol.com>
Date: Wed, 17 May 2000 23:31:12 EDT
Subject: Orange Peel Glaze
To: CLAYART@LSV.UKY.EDU
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hi all!
couple weeks ago, someone was talking about orange peel glaze. i would like
know the recipe and the firing instruction of it.
thanks
t
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JazNOTJazz@AOL.COM on mon 22 may 00
hi all!
couple weeks ago, someone was talking about orange peel glaze. i would like
know the recipe and the firing instruction of it.
thanks
t
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