wynpotter on sat 7 jan 12
> One thing that occurred to me about this :
> Earthenware clay will remain porous. It doesnt vitrify like porcelain
> does which is why it needs glaze to be able to contain a liquid. If
> Posey's mug doesnt sweat and yours does ( after being washed) ,
> could it be possible that yours isnt fired to maturity and the
> underfiring is making the clay even more porous , which could account
> for it holding more water in the foot than Posey's does? Might be
> worth a try to fire a little hotter?
>
> Marci the Chinapainter
Just to add one other note. If an earthenware mug is porous,putting it
in a microwave( to heat water for tea or coffee)the handle will heat to
the point where your customer will burn their hand. Test several mugs
before selling them to the public.
It may take several times of use and washings to get the moisture in the
body, if this is going to be an issue.
Underfired cone 6 stoneware can also suffer this issue.
Wyndham
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