I was kind of expecting a similar response...

----- Original Message -----
From: "Khaimraj Seepersad"
Subject: [IBC] Fw: [IBC] Ceramic Pots


Good Day to all,

not to spoil the fun,but Vitrification in Stoneware is
supposed to mean 3 to 5 % porous?[as far as I
can remember.]

Ahhh, most all of the stoneware clays I use are indeed about 2.5% , as I
recall, when fired to maturity. Do you figure they are doing a lot of
"breathing" at 2.5% porosity? ?
Have you EVER had moisture seep through your stoneware clays ( at 3-5%) as
with terra cotta or earthenware ( sometimes) and leave a crust of dried
water minerals on the outside? Now THAT'S "breathing" ! That's a "One
Season" pot in Ohio! :)


Inducing too much of the glass state is supposed
to weaken the object with regards to thermal
shock,isn't it ?

Has pottery science changed?

Thermal shock....is that important once the pot is finished fired? I don't
quite understand the comment in reference to a finished bonsai pot. Thermal
shock is a problem to consider when firing, not after it's in use.

What about porcelain??

Regards,
Dale

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