Suchman ceramics on thu 16 sep 10
Hey all, I have Diane Pancioli's ^6 reduction celadon. I was wondering if
anyone has a nice ^6 reduction BLUE celadon? Let me know and thanks for
your time.
-eric-in-o'side-
pagan by nature
>http://www.flickr.com/photos/42169721@N04/
Richard White on fri 17 sep 10
If you get one to work, please let us know. We have been beating on this =
=3D
one
for over a year now. We can get green celadon, but not blue yet. The issu=
=3D
e,
I believe, has to do with calcium and potassium. Cone 10 blues have lots =
=3D
of
calcium which melts nicely at that temperature, more potash than soda to
shift the green to blue, and sometimes a bit of bone ash. Higher calcium
cone 6 glazes are usually matte because the calcium doesn't melt as well,=
=3D
which is counter to the transparent glossy requirement for a celadon, and=
=3D
the extra potash is harder to come by in most cone 6 recipes. I have gott=
=3D
en
a beautiful pale blue reduced iron result using an obscure Fusion frit
(FZ-16), but it was more of an opalescent chun than a transparent celadon=
=3D
.
We continue the quest with some suggestions from a few of the world's bes=
=3D
t
(J, J, and R - you know who you are ;-) ), and anything you might add is
welcome.
cheers
Dick White (and Bill Schran, we're in this one together...)
John Hesselberth on sat 18 sep 10
On Sep 17, 2010, at 8:47 PM, Richard White wrote:
> Higher calcium
> cone 6 glazes are usually matte because the calcium doesn't melt as =3D
well,
> which is counter to the transparent glossy requirement for a celadon, =3D
and
> the extra potash is harder to come by in most cone 6 recipes
Hi Dick,
This is just a wild guess, but strontium is a more active alkaline earth =
=3D
than calcium at cone 6. Have you tried replacing some or all of the =3D
calcium with it?
Regards,
John=3D
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