[Clayart] re-firing

David Hendley farmpots at eastex.net
Mon Apr 25 19:34:33 UTC 2022

On 4/24/2022 1:02 PM, Barry Salaberry wrote:
> Re-firing
> I wonder if re-firing makes the pots more brittle that convention would
> serve?
> Would a dilatometer measurement of both provide less anecdotal survey?
> Does cristobalite increase or decrease with that re-fire?
> Is the pot which has been re-fired more subject to thermal shock?
> Does it affect glaze fit?
> Questions surface when we enter a new cave, but light does provide clarity
> one hopes.

Those are all good questions, and I think re-firing does, indeed, change 
I don't have any answers, but I think cristobalite is increased in a 
re-fire, and the
piece is probably more sensitive to thermal shock and more brittle.
Just my hunch.
In my experience glaze fit is not noticeably changed.

David Hendley
david at farmpots.com

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