Ann Brink on fri 27 apr 01
Paul wrote:
"Here is a question for all you experts that is driving me crazy because =
it
doesn't appear to make any sense at least at my level of knowledge. In
firing
bowls in an electric kiln for raku prior to post firing reduction it appe=
ars
to me that my glazes tend to run on the inside of the pot before they wil=
l
run on the outside. This seems pretty strange since I am firing fast and
would assume that the outside of the bowl gets more heat work than the
inside."
HI Paul,
I'm no expert but have an idea about this anyway. We know it takes time =
for
a glaze to run. I think that heat is retained slightly longer inside a
bowl, because it reflects back on itself, therefore the glaze gains a lit=
tle
extra time at a "liquid" temperature.
I have noticed that my bowls and vases which have been glazed an Iron Red=
,
develop a nicer color inside, and I have conjectured that reason is the
same- slower cooling inside a vessel.
I guess a way to test this would be to set a bowl within a bowl, and see
whether the outside also runs.
Regards,
Ann Brink in CA
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