Dayna Wolf on mon 24 feb 03
Hello- -- I'm a real newbie compared to you all but I have a question about
glass in the kiln that someone may have knowledge of. I'm an elementary
school art teacher and use an electric Paragon kiln, usually used for low
(05-06) firings.
A fellow teacher described a wine bottle that she purchased as a decorative
"cheese tray" that was apparently slumped in a kiln. It was fired by placing
the bottle on its side and it maintained the basic wine-bottle shape for such
an unusual and decorative serving tray.
Can I do this in my classroom kiln ? If so, I need to know the firing
temperature so that the bottle doesn't melt into a messy puddle of glass and
so it won't craze. I'd like to try it. What about beer bottles? Any ideas
on this?
Snail Scott on tue 25 feb 03
At 10:35 PM 2/24/03 EST, you wrote:
>A fellow teacher described a wine bottle that she purchased as a decorative
>"cheese tray" that was apparently slumped in a kiln...
>Can I do this in my classroom kiln ? If so, I need to know the firing
>temperature...
Yes, this will work OK in your kiln. The temperature is=20
usually about 1400-1500=BAF - really low by our standards.
You don't need to do slow turnups like with clay - just=20
turn it up every five minutes. (Going straight to 'high'=20
can stress the elements.) Don't try to use cones. Just=20
hang around, and when it gets close to red heat, check=20
the peephole regularly. When the bottle looks slumped=20
enough, turn it off.=20
-Snail
Jim Murphy on tue 25 feb 03
Dayna,
The following website (http://www.warmglass.com/Bottles.htm) info may help
you. You may be interested in signing-up for the Bulletin Board of
www.warmglass.com to search the "archives" and/or ask other glass artists
about their bottle slumping technique.
Best wishes,
Jim Murphy
SusanRaku@AOL.COM on wed 26 feb 03
Can you use a mold to shape the glass? Of what material? Will the glass stick to it?
Susan
Arnold Howard on thu 27 feb 03
You can use a bisque, unglazed bowl to slump glass. Coat the bowl with
glass separator or kiln wash.
Drill 1/8" holes in the bowl at points where air pockets could form as
the glass slumps. This is to prevent glass bubbles.
Ordinarily, glass is fused and slumped in two separate firings.
Sincerely,
Arnold Howard
Paragon Industries, L.P.
www.paragonweb.com
From:
> Can you use a mold to shape the glass? Of what material? Will the
glass stick to it?
Robin Wright on thu 27 feb 03
susan,
I was told about making moulds to slump glass onto, using a mix of 50
plaster and 50 powdered clay, then wetting and carving and firing in the
kiln . I don't see how this would work but the person who told me about it
seemed genuine maybe someone else has use this technique.
Robin
Shropshire, England, UK
----- Original Message -----
From:
To:
Sent: Thursday, February 27, 2003 3:37 AM
Subject: Re: Glass slumping question
> Can you use a mold to shape the glass? Of what material? Will the
glass stick to it?
>
> Susan
>
>
____________________________________________________________________________
__
> 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.
>
Jim Brooks on fri 28 feb 03
the glass will not stick-- if the mold is covered with a kiln wash that
contain no silica. You can use a half and half mixture of clay ( EPK or
OM4) and alumina. remember no silica.!!!!!!!!!!!!
You can make molds from clay slabs and fire to cone 06. The plaster
mixture with clay is a great mold but i do not remember how high to fire
it.. All molds must be fired higher than the slumping/melting temp of your
glass
. AND ALL MOLDS MUST BE COATED WITH THE Alumina/Clay kiln wash.
Jim in Denton
Arnold Howard on fri 28 feb 03
I believe the recipe Robin mentioned is for glass casting. This is where
you fill a mold with crushed glass. After firing (ordinarily very
l-o-n-g firing and cooling times), the mold is broken, leaving the glass
shape. The mold is fragile by design.
For glass slumping, people use low-fire bisque ware.
Sincerely,
Arnold Howard
Paragon Industries, L.P.
www.paragonweb.com
From: Robin Wright
> I was told about making moulds to slump glass onto, using a mix of 50
> plaster and 50 powdered clay, then wetting and carving and firing in
the
> kiln . I don't see how this would work but the person who told me
about it
> seemed genuine maybe someone else has use this technique.
>
> Robin
> Shropshire, England, UK
phil davenport on sat 1 mar 03
The mold would have to be made out of clay and coated with kiln wash. If kiln wash is not
used the glass will stick to the mold. Check out the web site--bulls eye glass and warm
glass--both sited have A LOT of information. Also do a web search for glass
slumping/fusing.
Phil Davenport
SusanRaku@AOL.COM wrote:
> Can you use a mold to shape the glass? Of what material? Will the glass stick to it?
>
> Susan
>
> ______________________________________________________________________________
> 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 sat 1 mar 03
At 07:50 AM 3/1/03 -0600, you wrote:
>The mold would have to be made out of clay and coated with kiln wash.
Someone once told me that glass-forming kilnwash is
different from mnormal ceramics kilnwash, but they
couldn't tell me how; they just bought what the glass
company sold them in expensive jars. Is it actually
a different recipe, or are they just preying on the
needs of people who don't have silica, kaolin,
alumina, etc, lying around?
-Snail
Terrance Gallentine on sun 2 mar 03
This is probably old information for some but not obviously for others.
Glass kiln wash is different than that for pottery. Kiln wash for glass can
be made by making a mix of 60% alumina hydrate and 40% kaolin. You can use
EPK kaolin to get a wash with more binder or you can use calcined kaolin to
get a wash that moves with the substrate. Either seems to work well as far
as not sticking to the glass.
>From: phil davenport
>Reply-To: Clayart
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Re: Glass slumping question
>Date: Sat, 1 Mar 2003 07:50:14 -0600
>
>The mold would have to be made out of clay and coated with kiln wash. If
>kiln wash is not
>used the glass will stick to the mold. Check out the web site--bulls eye
>glass and warm
>glass--both sited have A LOT of information. Also do a web search for
>glass
>slumping/fusing.
>
>Phil Davenport
>
>SusanRaku@AOL.COM wrote:
>
> > Can you use a mold to shape the glass? Of what material? Will the
>glass stick to it?
> >
> > Susan
> >
> >
>______________________________________________________________________________
> > 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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Michelle Lowe on sun 9 mar 03
At 08:49 AM 3/1/2003 -0800, you wrote:
>At 07:50 AM 3/1/03 -0600, you wrote:
>>The mold would have to be made out of clay and coated with kiln wash.
>
>Someone once told me that glass-forming kilnwash is
>different from mnormal ceramics kilnwash, but they
>couldn't tell me how; they just bought what the glass
>company sold them in expensive jars. Is it actually
>a different recipe, or are they just preying on the
>needs of people who don't have silica, kaolin,
>alumina, etc, lying around?
>
Probably the latter. I have successfully molded glass several times in clay molds with 50/50 alumina/kaolin wash (applied to the mold green and again after bisquing). A great website if it hasn't been mentioned- www.warmglass.com
Mishy, oh-so-ready for San Diego
Michelle Lowe potter in the Phoenix desert
http://www.desertdragonpottery.com
Mishy@desertdragonpottery.com
mishlowe@amug.org
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