Martha Silver on thu 16 aug 07
I've heard repeatedly that it's not wise to use the same kiln shelves in both a gas fire (C10R) and wood fire. Can anyone explain why?
Thanks!
Martha Silver
marthaksilver@yahoo.com
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Gary Navarre on thu 16 aug 07
On Thu, 16 Aug 2007 10:43:22 -0700, Martha Silver
wrote:
>I've heard repeatedly that it's not wise to use the same kiln shelves in
both a gas fire (C10R) and wood fire. Can anyone explain why?
>
> Thanks!
>
> Martha Silver
> marthaksilver@yahoo.com
Hi Folks,
I've not heard that enough to recall any truth but I would imagine with the
rise in students firing wood, gas, salt/soda, electric, solar... in the
shuffle shelves could get from the wood kiln into another fuel and drip any
ash glaze that formed over time. In most of the group kilns the shelves have
way too much kiln wash slathered on from the git go and end up making a real
mess. In a more private situation shelf maintenance becomes becomes easier.
In a wood kiln ash will end up just about everywhere so I plan to give every
surface of the shelves and posts a thinish coat of wash before the first
fire, and who knows when the hell that will be eh? Stay in there!
G in da U.P.
om on fri 17 aug 07
On Thu, 16 Aug 2007 10:43:22 -0700, Martha Silver
wrote:
> I've heard repeatedly that it's not wise to use the same kiln
> shelves in
> both a gas fire (C10R) and wood fire. Can anyone explain why?
I can't speak for all wood kilns, but mine deposits a great deal of
ash glaze and all of my shelves have a substantial amount of glaze on
them. If I used those shelves in a conventional kiln, I would still
have to put wadding under every piece because at high temperature,
the glaze on the shelves would melt. If the pieces were resting
directly on the shelves, they'd end up irretrievably glued to the
shelves.
Here's what it looks like when things get bonded to a shelf -- sorta
-- this pic is from a disastrous firing where a shelf tipped -- these
pieces were knocked into each other and off their wadding forming a 3
part fusion permanently affixed to a glaze coated floor brick
(pretend the brick is a shelf).
http://www.anagama-west.com/anagama/firing/firing-6/2006_03-
anagama_firing/2006_03-anagama_firing-Pages/Image0.html
Anyway, if you consider spending extra effort to be "unwise", then it
would be unwise to use my shelves in a conventional kiln because you
would need to wad each piece. If you don't mind the extra effort of
wadding, then using the shelves would simply be "more work".
odin
anagama-blog
http://www.anagama-west.com/firing_log
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