John Hesselberth on tue 20 nov 01
on 11/20/01 3:58 PM, Susan at susan_dicksonsmith@HOTMAIL.COM wrote:
> Thanks to all for the helpful & fascinating posts on foodsafe glazes. I was
> particularly intrigued by John Hesselberth's experiments with putting a
> thin layer of transparent glaze over a leaching copper matt.
>
> I wonder if it's worth trying to reglaze OVER a previously fired piece
> glazed with a copper matt. I know I'd still have to test it for leaching,
> but I wonder if it's even worth the kiln space. Whaddya think... is there
> ANY reason to believe this could work, or am I deluding myself?
Hi Susan,
It could work if you could get the glaze applied uniformly and to a
reasonable thickness. Applying glaze over a previously glaze piece is not
easy. But as you said yourself, the only way to know for sure would be to
test it. The better way is to use a stable glaze to start with. You can
have a nice copper green matte or semimatte that is stable. Xavier's Warm
Jade Green is a nice one in the semimatte category at cone 6.
Regards,
John
Web site: http://www.frogpondpottery.com Email: john@frogpondpottery.com
"The life so short, the craft so long to learn." Chaucer's translation of
Hippocrates, 5th cent. B.C.
Susan on tue 20 nov 01
Thanks to all for the helpful & fascinating posts on foodsafe glazes. I was
particularly intrigued by John Hesselberth's experiments with putting a
thin layer of transparent glaze over a leaching copper matt.
I wonder if it's worth trying to reglaze OVER a previously fired piece
glazed with a copper matt. I know I'd still have to test it for leaching,
but I wonder if it's even worth the kiln space. Whaddya think... is there
ANY reason to believe this could work, or am I deluding myself?
-Susan, who fired a kiln full of tosh green pots two days before reading
all those great posts about glaze stability :(
Susan on wed 21 nov 01
Thanks... I'll give it a try and see what happens!
I REALLY appreciate the list of tested glazes on your site... I had already
decided to start using xavier's from now on. It looks like a great glaze.
Thanks again for all your work on this subject... any more news on a
publication date for your book? I've already notified Santa.
Susan
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