Victoria Hamilton on thu 14 sep 06
Hank -
Alumina oxide? Not Alumina Hydrate?
Vicki Hamilton
Millennia Antica Pottery
Seattle, WA
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Hank Murrow
Sent: Thursday, September 14, 2006 18:48
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Kiln Wash for Nitride Bonded Silicone Shelves
On Sep 14, 2006, at 7:13 AM, Lynne Berman wrote:
>
> However, our 50-50 kiln wash of EPK and alumina hydrate flaked off our
> new nitride bonded silicone shelves and onto a lot of the ware. Here's
> the
> question:
> what kiln wash will stay put on these shelves. I know there's a
> question of doing without but porcelain will stick, according to what
> I've read.
> Any help
> would be appreciated.
Dear Lynn;
I just evenly distribute dry alumina oxide powder on the Advancer shelf
surface and nothing sticks, nothing flakes off.
Cheers, Hank
www.murrow.biz/hank
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Lynne Berman on thu 14 sep 06
First, we (The Long Beach Island Foundation of Arts and Sciences) finally
fired our new Geil. First they couldn't get it on a truck in California for
several weeks, then the architect and builder couldn't agree on construction
issues, and so it went for the whole summer. The good news is that it is gorgeous
and fired carbon-trapped shinos, celadons and coppers reds, all at the same
time. We expected the first firing to be mostly a learning experience but it was
really a huge success and the frustrations of the summer almost forgotten.
However, our 50-50 kiln wash of EPK and alumina hydrate flaked off our new
nitride bonded silicone shelves and onto a lot of the ware. Here's the question:
what kiln wash will stay put on these shelves. I know there's a question of
doing without but porcelain will stick, according to what I've read. Any help
would be appreciated.
Lynne Berman still eking out a last few weeks at the beach
William & Susan Schran User on thu 14 sep 06
On 9/14/06 10:13 AM, "Lynne Berman" wrote:
> However, our 50-50 kiln wash of EPK and alumina hydrate flaked off our ne=
w
> nitride bonded silicone shelves and onto a lot of the ware. Here's the
> question:
> what kiln wash will stay put on these shelves.
The Advancer shelves do require a specific type of kiln wash.
You can find this wash at
A link at this site includes an article titled "Lighten Up".
Form that article:
"...However, unglazed porcelain foot rings and pot bottoms will fuse onto a
shelf surface so tenaciously that pots cannot be removed without breaking
off the fused portion. This effect is similar to that seen in a wood-burnin=
g
kiln=8Bthe alkalis in the porcelain glaze migrate under the ware and flux the
glass layer of the shelf, especially at higher temperatures. This lowers th=
e
viscosity of the glass layer, making it very sticky.
These potentially destructive effects can be overcome by using an
appropriate high-alumina kiln wash when firing porcelain bodies. Due to the
advanced NSiC material=B9s extremely low porosity, kiln washing a shelf is
like trying to re-glaze a fired pot that has already been glazed; however,
pre-warming the shelves to promote drying can facilitate kiln wash
application. Additionally, several thin coats of an appropriate
low-clay-content wash will have less of a tendency to lift off during dryin=
g
and firing. A fired coating specifically designed for porcelain
compatibility and adherence to the advanced NSiC shelves can also be used.
It is best to consult an application specialist for a specific kiln wash or
coating recommendation."
We've been firing to ^10 reduction in our Geil kiln and have not encountere=
d
too many issues so far with porcelain sticking. We don't use any kiln wash.
-- William "Bill" Schran
Fredericksburg, Virginia
wschran@cox.net
wschran@nvcc.edu
Hank Murrow on thu 14 sep 06
On Sep 14, 2006, at 7:13 AM, Lynne Berman wrote:
>
> However, our 50-50 kiln wash of EPK and alumina hydrate flaked off our
> new
> nitride bonded silicone shelves and onto a lot of the ware. Here's the
> question:
> what kiln wash will stay put on these shelves. I know there's a
> question of
> doing without but porcelain will stick, according to what I've read.
> Any help
> would be appreciated.
Dear Lynn;
I just evenly distribute dry alumina oxide powder on the Advancer shelf
surface and nothing sticks, nothing flakes off.
Cheers, Hank
www.murrow.biz/hank
Hank Murrow on fri 15 sep 06
On Sep 15, 2006, at 1:33 PM, David Hendley wrote:
> Hank, how do you evenly distribute dry alumina on your shelves?
> I pour some on and then rake and smooth it with the edge of a
> piece of cardboard. Do you have a better way?
Dear David;
I use one of those silicon carbide masonry stones with the grooves cut
into the working side. I pour about a tablespoon of alumina out on the
shelf and skate the stone around in circles and out to the corners to
distribute the alumina............. works pretty good.
Cheers, Hank
www.murrow.biz/hank
David Hendley on fri 15 sep 06
Hank, how do you evenly distribute dry alumina on your shelves?
I pour some on and then rake and smooth it with the edge of a
piece of cardboard. Do you have a better way?
David Hendley
Maydelle, Texas
david(at)farmpots(dot)com
http://www.farmpots.com
----- Original Message ----- >
> I just evenly distribute dry alumina oxide powder on the Advancer shelf
> surface and nothing sticks, nothing flakes off.
>
> Cheers, Hank
> www.murrow.biz/hank
claybair on fri 15 sep 06
David,
You might try one of those plastic
grout trowels.
Gayle Bair
Bainbridge Island, WA
Tucson, AZ
http://claybair.com
-----Original Message-----
From:David Hendley
Hank, how do you evenly distribute dry alumina on your shelves?
I pour some on and then rake and smooth it with the edge of a
piece of cardboard. Do you have a better way?
David Hendley
Maydelle, Texas
david(at)farmpots(dot)com
http://www.farmpots.com
--
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Mark Issenberg on fri 15 sep 06
I use a wide brush for the dry alumina. I dump some on then use the brush..
After the firing i dump the alumina in a wide plastic tub. I did that for a
while but have now had to flip my shelves , They were starting to warp. I dont
put any alumina on the shelves anymore.. It seems any mistakes scrape off
just like Paul Geil said to me.
Mark
Lookout Mountain Pottery
Dannon Rhudy on fri 15 sep 06
David, when I use dry alumina, I use a large flour sifter.
It's pretty easy to get it even, or even enough. I leave an
inch or so around the edges bare.
regards
Dannon Rhudy
----- Original Message -----
From: "David Hendley"
To:
Sent: Friday, September 15, 2006 3:33 PM
Subject: Re: Kiln Wash for Nitride Bonded Silicone Shelves
> Hank, how do you evenly distribute dry alumina on your shelves?
> I pour some on and then rake and smooth it with the edge of a
> piece of cardboard. Do you have a better way?
> David Hendley
> Maydelle, Texas
> david(at)farmpots(dot)com
> http://www.farmpots.com
>
>
> ----- Original Message ----- >
> > I just evenly distribute dry alumina oxide powder on the Advancer shelf
> > surface and nothing sticks, nothing flakes off.
> >
> > Cheers, Hank
> > www.murrow.biz/hank
>
>
____________________________________________________________________________
__
> 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 fri 15 sep 06
On Sep 14, 2006, at 9:13 AM, Lynne Berman wrote:
> ... our 50-50 kiln wash of EPK and alumina hydrate flaked off our new
> nitride bonded silicone shelves... I know there's a question of
> doing without but porcelain will stick...
If it's a question of porcelain plucking,
swipe the bottoms of the work with wax
that's been mixed with a bit of alumina.
It works well for that purpose, and just
a little alumina goes a long way.
-Snail
Nan Thurn Kitchens on sat 16 sep 06
Hi David,
I use grog on my shelves when firing large tiles so they can move.
I have a 2"x 6" steel rib with 1/8 in pointed teeth on one side that I use
to rake
an even layer of grog. I would assume it would work for evenly distributing
any dry application.
Wayne Seidl loaned me his three Dave Hendley Extruder DVD's.
I enjoyed very much watching you work.
It was good to "see" you again. :-)
Best,
Nan
Nan Thurn Kitchens
Architectural Clayworks
Box 371070
Key Largo Florida 33037
305-451-9885
Kathi LeSueur on sat 16 sep 06
Since I've been thinking about buying some of these shelves this thread
interests me. Specifically, does stoneware have the same problem with
sticking that porcelain does. And, has anyone tried putting alumina
hydrate into the wax brushed on the bottoms of pots rather than applying
wash to the shelves. I've never washed my shelves but I have added
alumina hydrate to hot wax resist.
Kathi
Hank Murrow on sat 16 sep 06
On Sep 16, 2006, at 9:04 AM, Kathi LeSueur wrote:
> Since I've been thinking about buying some of these shelves this thread
> interests me. Specifically, does stoneware have the same problem with
> sticking that porcelain does. And, has anyone tried putting alumina
> hydrate into the wax brushed on the bottoms of pots rather than
> applying
> wash to the shelves. I've never washed my shelves but I have added
> alumina hydrate to hot wax resist.
Dear Kathi;
I wax my feet with alumina re-inforced wax. I also use alumina powder
on the Advancers. Only the very vitrified Grolleg-based porcelains
stick.
Cheers, Hank
www.murrow.biz/hank
William & Susan Schran User on sat 16 sep 06
On 9/16/06 12:04 PM, "Kathi LeSueur" wrote:
> Specifically, does stoneware have the same problem with
> sticking that porcelain does.
We've rarely had porcelain stick to our Advancers and we've never had
stoneware stick.
An instance that may cause stoneware to stick, would be clay bodies with an
amount of iron where the iron might flux the clay too much.
-- William "Bill" Schran
Fredericksburg, Virginia
wschran@cox.net
wschran@nvcc.edu
W J Seidl on sat 16 sep 06
David:
Don't let Nan fool you. Those tiles do more than move, they slide, they
dance they writhe in pleasure.
I arrived at her studio last week to find aqua/turquoise slipped =
starfish
tiles and white slipped mermaid segments doing a samba all over her
worktables.
Darn fine work it was too, and not a half-bad samba.=20
Mel would be proud.
Must be the water up there...or maybe the clay.
ROFL
Wayne
taking apart a Walker...grunt, swear, sweat, SNAP! Da**it!
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Nan Thurn
Kitchens
Sent: Saturday, September 16, 2006 11:31 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Kiln Wash for Nitride Bonded Silicone Shelves
Hi David,
I use grog on my shelves when firing large tiles so they can move.
I have a 2"x 6" steel rib with 1/8 in pointed teeth on one side that I =
use
to rake
an even layer of grog. I would assume it would work for evenly =
distributing
any dry application.
Wayne Seidl loaned me his three Dave Hendley Extruder DVD's.
I enjoyed very much watching you work.
It was good to "see" you again. :-)
Best,
Nan
Nan Thurn Kitchens
Architectural Clayworks
Box 371070
Key Largo Florida 33037
305-451-9885
_________________________________________________________________________=
___
__
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.
Barbara Arner on thu 28 sep 06
On Thu, 14 Sep 2006 10:13:23 EDT, Lynne Berman wrote:
>First, we (The Long Beach Island Foundation of Arts and Sciences) finally
>fired our new Geil. First they couldn't get it on a truck in California
for
>several weeks, then the architect and builder couldn't agree on
construction
>issues, and so it went for the whole summer. The good news is that it is
gorgeous
>and fired carbon-trapped shinos, celadons and coppers reds, all at the
same
>time. We expected the first firing to be mostly a learning experience but
it was
>really a huge success and the frustrations of the summer almost forgotten.
>
>However, our 50-50 kiln wash of EPK and alumina hydrate flaked off our new
>nitride bonded silicone shelves and onto a lot of the ware. Here's the
question:
>what kiln wash will stay put on these shelves. I know there's a question
of
>doing without but porcelain will stick, according to what I've read. Any
help
>would be appreciated.
>
>Lynne Berman still eking out a last few weeks at the beach
>
>__________________________________________________________________________
____
>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.
Have you tried
3/4 Alumina
1/4 Kaolin
for a kiln wash recipe?
Good luck.
Hank Murrow on thu 1 mar 07
On Sep 15, 2006, at 1:33 PM, David Hendley wrote:
> Hank, how do you evenly distribute dry alumina on your shelves?
> I pour some on and then rake and smooth it with the edge of a
> piece of cardboard. Do you have a better way?
Gee, not sure. What I do is use a SiC block with diagonal grooves in
the bottom, which catch the alumina and spread it around pretty evenly.
You could make something like that from clay.
How are things coming along with Karen's school project?
I'll miss seeing you in Louisville, as I need time in the studio.
Love, Hank
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