Dale Cochoy on mon 26 aug 02
Is there a simple way, or additive that will effectively matt a glossy glaze
without effecting coloring too much?
Dale Cochoy
John Hesselberth on mon 26 aug 02
Hi Dale,
You might try grit blasting. Actually, a complete answer to your
question is quite complex. If you are making functional work and want
your glaze to be durable there is no simple way to accomplish what you
ask. If you are making decorative work and don't care about durability
you can get some glazes to go matte just by underfiring them a few
cones. Color may or may not be affected. Generally the more matte you
make it the lighter color it will be.
Regards,
John
On Monday, August 26, 2002, at 10:38 AM, Dale Cochoy wrote:
> Is there a simple way, or additive that will effectively matt a glossy
> glaze
> without effecting coloring too much?
> Dale Cochoy
>
> ______________________________________________________________________________
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Snail Scott on mon 26 aug 02
At 10:38 AM 8/26/02 -0400, you wrote:
>Is there a simple way, or additive that will effectively matt a glossy glaze
>without effecting coloring too much?
Magnesium carbonate will make a glaze matte. It
will affect the color of cobalt in particular,
though. For non-food uses, reducing the flux will
cause it to be undervitrified at your temperature
and be more matte in appearance, with a different
look than the mattes produced with magnesium.
Test any modifications first, though.
-Snail
David Dowell on mon 26 aug 02
Without knowing more about your process, my first thought would be to add a
measured amount of ball clay into the mix. This should reduce the
percentage of glass [ silica] in the glaze, matting the finish.
-----Original Message-----
From: Dale Cochoy [mailto:dalecochoy@PRODIGY.NET]
Sent: Monday, August 26, 2002 9:39 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Matting a gloss glaze
Is there a simple way, or additive that will effectively matt a glossy glaze
without effecting coloring too much?
Dale Cochoy
____________________________________________________________________________
__
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You may look at the archives for the list or change your subscription
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Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Ababi on tue 27 aug 02
The easiest way is to add alumina hydrate: amounts: 1,2, up to ten.
You can try, if you cannot find alumina add kaolin. When you have the right recipe you
can rebuild it using ceramic software
---------- Original Message ----------
>Without knowing more about your process, my first thought would be to add a
>measured amount of ball clay into the mix. This should reduce the
>percentage of glass [ silica] in the glaze, matting the finish.
>-----Original Message-----
>From: Dale Cochoy [mailto:dalecochoy@PRODIGY.NET]
>Sent: Monday, August 26, 2002 9:39 AM
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Matting a gloss glaze
>Is there a simple way, or additive that will effectively matt a glossy glaze
>without effecting coloring too much?
>Dale Cochoy
>____________________________________________________________________________
>__
>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.
Janet Kaiser on tue 27 aug 02
Missed you original post, so am not too sure what you are trying to
achieve, Dale. IF it is matt with gloss, i.e. you want the same gloss glaze
all over but design areas of matt, would it be possible to use the "instant
etching" technique glass makers are using these days? Our local glass man
uses one which is a sticky pink paste. It is simply painted on and then
wiped off after a few minutes, leaving matt areas which look as though they
were etched. He can do really intricate work by cutting out and applying
sticky plastic as "resist".
If this is the effect you are looking for and you do try this method, be
very meticulous using the "goo"... A little goes a very long way and will
dull anything glass-like it comes in contact with... even the slightest
smear. It is otherwise a safe method, which will not affect your skin. Same
result, but nothing like acid etching! But, I do not see why it would not
work, especially with a high silica, gloss glaze, but have obviously not
tried it myself. 'Twas just a thought. Just don't tell the purists if it
works... :-)
Janet Kaiser
The Chapel of Art =95 Capel Celfyddyd
8 Marine Crescent, Criccieth LL52 0EA, Wales, UK
Tel: 01766-523570 URL: http://www.the-coa.org.uk
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