Brandon Phillips on tue 27 oct 09
While we're on the subject of Larkin kiln shelves...
I recieved a bunch today for the University I teach at. You can read
about them here:
http://supportyourlocalpotter.blogspot.com/2009/10/kiln-shelves.html
Brandon Phillips
www.supportyourlocalpotter.com
William & Susan Schran User on tue 27 oct 09
On 10/27/09 1:29 PM, "Brandon Phillips"
wrote:
> While we're on the subject of Larkin kiln shelves...
> I recieved a bunch today for the University I teach at. You can read
> about them here:
> http://supportyourlocalpotter.blogspot.com/2009/10/kiln-shelves.html
Read your blog about the shelves.
The wash is probably 98% alumina and 2% bentonite.
This is what I got either from Larkin or Euclid's - have to look at my note=
s
- and when I contacted the Chinese rep, he told me about the kiln wash
composition.
Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Brandon Phillips on tue 27 oct 09
I had considered the corelite shelves but these new shelves are for a
student kiln and my concern is the havoc that is wreaked on cordierite
when glaze gets through the kiln wash, as it most certainly will in this
kiln. On SiC shelves the glaze practically pops off when you touch it
with the grinder leaving no damage to the shelf. I personally fire in a
wood/salt kiln so I think corelites are incompatible for either of these
scenarios.
Brandon Phillips
www.supportyourlocalpotter.com
> all i will add is that i can take one of my newish 18X24 corelites and
> lift
> it up over my head with one hand (just thought i would try it since they
> seemed so light) and after at least 10 firings to cone 11 those shelves
> are
> straighter than many of the larkin silicon carbides were right from the
> factory (and they feel like they are made out of lead compared to the
> corelites. And they cost a lot more.
> I would never recommend the chinese silicon carbides over the corelites
> for
> any purpose. One of the reps from Resco (who distributes them) said there
> is a factory he sold them to a while back that was firing to cone 10,
> going
> from cold to cold in about 12 hours. That is, starting up, firing to cone
> 10 and having it unloaded all in a 12 hour period. I would not try that
> myself but they must be good shelves if that can handle that (if that is =
a
> true story, who knows)
>
> Paul
>
>
>
> ---------- Forwarded message ----------
> From: Brandon Phillips
> Date: Oct 27, 2009 1:29pm
> Subject: Larkin kiln shelves
> To: Clayart@lsv.ceramics.org
> CC:
>
>
>> While we're on the subject of Larkin kiln shelves...
>
>
>> I recieved a bunch today for the University I teach at. You can read
>
>
>> about them here:
>
>
>> http://supportyourlocalpotter.blogspot.com/2009/10/kiln-shelves.html
>
>
>
>
>
>> Brandon Phillips
>
>
>> www.supportyourlocalpotter.com
>
William & Susan Schran User on tue 27 oct 09
On 10/27/09 5:18 PM, "Paul Borian" wrote:
> all i will add is that i can take one of my newish 18X24 corelites and li=
ft
> it up over my head with one hand (just thought i would try it since they
> seemed so light) and after at least 10 firings to cone 11 those shelves a=
re
> straighter than many of the larkin silicon carbides were right from the
> factory (and they feel like they are made out of lead compared to the
> corelites. And they cost a lot more.
> I would never recommend the chinese silicon carbides over the corelites f=
or
> any purpose. One of the reps from Resco (who distributes them) said there
> is a factory he sold them to a while back that was firing to cone 10, goi=
ng
> from cold to cold in about 12 hours. That is, starting up, firing to cone
> 10 and having it unloaded all in a 12 hour period. I would not try that
> myself but they must be good shelves if that can handle that (if that is =
a
> true story, who knows)
Paul,
I agree with most all of what you've written.
The Corelite's are indeed light and don't seem subject to warping.
In testing at ^10 reduction, I didn't note any warping, even without
flipping, after many firings.
The only issue is you are still dealing with a cordierite/high alumina
shelf. Used in a situation where glaze accidents happen, they must be coate=
d
with kiln wash and any glaze contacting the shelf must be ground out.
Certainly any cordierite shelf will withstand rapid heating/cooling much
better than any silicon carbide shelf.
Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
| |
|
