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testing woodfired glazes

updated sat 9 mar 02


karen terpstra on fri 8 mar 02

Hi John and Ron,
I will bring a cup that DID NOT pass the stability tests. Doesn't have
anything to do with recipes in your book but a question that has come up
on Clayart and as far as I know there haven't been answers. There are
allot of new woodfire people on the list and I think it's important to

Some of the shino functional ware that I have personally been using for
3-5 years is showing wear and tear from the dishwasher. I've had to
throw them all out. Too much ash evidently on these pieces even though
everything is nice and smooth---good to the touch when they come out of
the kiln. They're nice for awhile then leaching starts, flaking
begins. It creeps up on them slowly.

In this case, so glad I've not been a production potter and sold this
type of stuff unknowingly! I was just fooling around trying different
recipes of shinos in a wood kiln.

I'd like to talk with you about doing some testing in our wood kiln.

Happy firings (with whatever kiln or cone)
Karen Terpstra
La Crosse, WI
ps. John, don't forget the scotch.
pss. The "gunky" cup will be there too.