clennell on wed 23 jun 04
hank: The best shino these eyes have ever seen was on Ken Matsuzaki's pots
in Mashiko. Now I understand he holds his wood kiln for about a week to
soften the surface. With your experimenting at holding the kiln at 1800
would you or have you snuck another set of cones in the kiln to see what
cone actually goes down with a hold at 1800 for your 10 hours. I'm thinking
you're probably holding the kiln at a as much as cone 6- What do you think?
thanks as always,
Cheers,
Tony
p.s still chasing the illusive.
Hank Murrow on thu 24 jun 04
On Jun 23, 2004, at 5:50 PM, clennell wrote:
> hank: The best shino these eyes have ever seen was on Ken Matsuzaki's
> pots
> in Mashiko. Now I understand he holds his wood kiln for about a week
> to
> soften the surface. With your experimenting at holding the kiln at
> 1800
> would you or have you snuck another set of cones in the kiln to see
> what
> cone actually goes down with a hold at 1800 for your 10 hours. I'm
> thinking
> you're probably holding the kiln at a as much as cone 6- What do you
> think?
Dear Tony;
I have not figured out a way to put a second set of cones in to the
kiln to see what heatwork is occurring during the soak. Those pesky
cones just don't want to stand back up and fall again. However, I do
keep an eye on the OxyProbe to make sure the temperature is where I
want it, and it hovers around 1800F most of the time. By increasing the
gas pressure to 2.5"wc, I can enable a slow rise in temp, while 2"wc
will hold temp, and 1.75"wc will let it drop slowly. I don't think that
Cone 6 would be bending during any of my soaks in oxidation.
I suppose that I could let the kiln cool enough to open and place new
cones in, re-firing to the soak temperature to see which cones would
fall by the end of the soak.
Dicey experiment though,
Cheers, Hank
BTW, I saw some of Ken Matsutaki's work at the Pucker Gallery while on
my east coast swing......... gorgeous!
> murrow.biz/hank
steve harrison on fri 25 jun 04
Hi Tony,
I know that you didn't address this question to me, but I have some
insight into what you ask of Hank.
In a 10 day wood firing rising slowly over the entire period (ie. NOT
racing to s/w and then soaking for the remaining time) Cone 9 melts at
1150oC.
Of course only the last couple of days of firing as it got over 1000oC
would have any effect on the heat work that causes melting.
I assume that I would get the same degree or melting and heat work (but
not ash deposit) by firing quickly to 1000oC and then progressing
slowly to 1150oC over 2 days.
Best wishes
Steve Harrison
Hot & Sticky Pty Ltd
5 Railway Pde
Balmoral Village
NSW 2571
Australia
http://ian.currie.to/sh/Steve_Harrisons_books.html
On Thursday, June 24, 2004, at 10:50 AM, clennell wrote:
> hank: The best shino these eyes have ever seen was on Ken Matsuzaki's
> pots
> in Mashiko. Now I understand he holds his wood kiln for about a week
> to
> soften the surface. With your experimenting at holding the kiln at
> 1800
> would you or have you snuck another set of cones in the kiln to see
> what
> cone actually goes down with a hold at 1800 for your 10 hours. I'm
> thinking
> you're probably holding the kiln at a as much as cone 6- What do you
> think?
>
> thanks as always,
> Cheers,
> Tony
> p.s still chasing the illusive.
>
> _______________________________________________________________________
> _______
> 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.
>
| |
|
