[Clayart] Crash cooling and funny story

[Jeff Lawrence]

Terry wrote:
Crash cooling has some benefits.  While in China, I witnessed a kiln being
opened immediately after being shut down.  It was unbelievable.  They just
opened a cone 12 firing and let the air rush in.  The kiln was closed after
a while.  I asked one of the kiln masters the benefit, and he stated that
it stopped any crystallization of the clear transparent glaze.  The result
was a very clear and clean transparent glaze.

Hi,
Altho Terry's story shows a lot more gumption than I've got, I have gotten
in the habit of cooling as fast as a full-open damper will allow from 2300-
2000 for better copper reds; this was one of the sapient Karl Platt's
recommendations to avoid large agglomerations of copper crystals (i.e. the
justly reviled liver-red.)

Jeff
Jeff Lawrence
jefflawr at gmail.com
jeffreylawrence.net

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