Timothy Flynn on mon 25 nov 02
Hi, all I just opened my sawdust injected kiln after a cone 10 fireing and found many mini disasters . A large number of pieces had piles of clay crumbles where there should have been foot rings. I had dipped the bone dry clay in hot wax prior to dipping ,should I have waxed at leather hard? Any thoughts?
Timothy
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Ned Ludd on mon 25 nov 02
>Hi, all I just opened my sawdust injected kiln after a cone 10
>fireing and found many mini disasters . A large number of pieces had
>piles of clay crumbles where there should have been foot rings. I
>had dipped the bone dry clay in hot wax prior to dipping ,should I
>have waxed at leather hard? Any thoughts?
>
>Timothy
Sounds weird. I never heard of this. You might want to try waxing at
leather hard, as you say.
Are you letting your glazed pots dry completely before loading and
firing them? Rushing raw glazed pots into a firing is asking for
trouble, unless your clay is very amenable.
Some clayarters might like to use this bummer to convert you to that
ghastly, spiritually enfeebling stuff, cold liquid 'wax' emulsion.
Some may mean well ... but for the sake of your immortal soul,
Timothy, be warned: outside the True Path of Hot Wax Resist There is
NO Salvation!
bless you ;-)
Ned
Snail Scott on mon 25 nov 02
At 10:29 AM 11/25/02 -0800, you wrote:
>clay crumbles where there should have been foot rings. I had dipped the
bone dry clay in hot wax...
Maybe the feet absorbed moisture from glazing,
and didn't dry completely under the wax?
-Snail
John Rodgers on mon 25 nov 02
Timothy, it sounds like the foot was not dry. Like maybe it was waxed
when leather hard, thus impedeing the drying. Are you dead sure the foot
ring was dry? Maybe it should have dryed longer.
I fire electric, and I do a bisque fire and then a glaze fire, but
ANYTIME I have any doubt whatsoever about the moisture content, be it
greenware or a bisqued pot that may have been washed or something, I
bring the temp up veeery slowly and let it hold for several hours before
moving on up to higher temps. I have reduced cracking and flaking to
almost zero.
I'm convinced you don't have perfectly dry greenware. What you
described, in my experience, can only be caused by entrapped moisture.
It may be that the manner in which you are handling the glaze process is
introducing moisture into the raw clay that penetrates quite deeply,
thus the fracturing you describe.
Just trying to logic this out based on my own experience.
FWIW,,
John Rodgers
B'ham, Alabam
Timothy Flynn wrote:
> Hi, all I just opened my sawdust injected kiln after a cone 10 fireing and found many mini disasters . A large number of pieces had piles of clay crumbles where there should have been foot rings. I had dipped the bone dry clay in hot wax prior to dipping ,should I have waxed at leather hard? Any thoughts?
>
> Timothy
>
>
>
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