Earl Brunner on wed 19 jan 05
How old is her spodumene? That is a characteristic of vintage Spodumene,
circa 60-70's.
Earl Brunner
Las Vegas, NV
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Jennifer Boyer
Sent: Wednesday, January 19, 2005 10:33 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: bubbles in the glaze bucket
Hi there,
A friend just mixed up a test batch of glaze using Neph Sy, Whiting,
EPK, Flint, Spodumene(10%) and Lithium(2%) and she can't get the
bubbles that appeared to settle down. I suggested adding a bit of
vinegar. Anyone have any other suggestions? Do you think it's the Spod
and Lithium making the bubbles?
Jennifer
************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
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Jennifer Boyer on wed 19 jan 05
Hi there,
A friend just mixed up a test batch of glaze using Neph Sy, Whiting,
EPK, Flint, Spodumene(10%) and Lithium(2%) and she can't get the
bubbles that appeared to settle down. I suggested adding a bit of
vinegar. Anyone have any other suggestions? Do you think it's the Spod
and Lithium making the bubbles?
Jennifer
************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
Sue Cline on wed 19 jan 05
Several months ago, I think it was Marcia Selsor who said the bubbles can be tamed with a quick squirt of diluted alcohol. I have used this on some of my glazes without any ill effect.
Sue Cline
- Cincinnati, Ohio
Potters' Council Member
-----Original Message-----
From: Jennifer Boyer
Sent: Jan 19, 2005 1:32 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: bubbles in the glaze bucket
Hi there,
A friend just mixed up a test batch of glaze using Neph Sy, Whiting,
EPK, Flint, Spodumene(10%) and Lithium(2%) and she can't get the
bubbles that appeared to settle down. I suggested adding a bit of
vinegar. Anyone have any other suggestions? Do you think it's the Spod
and Lithium making the bubbles?
Jennifer
************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
______________________________________________________________________________
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
Paul Lewing on wed 19 jan 05
on 1/19/05 10:32 AM, Jennifer Boyer at jboyer@ADELPHIA.NET wrote:
> Do you think it's the Spod
> and Lithium making the bubbles?
I have an old batch of spodumene that has always foamed when water is added.
I've found two solutions, neither of which change the fired result. One is
to calcine the spodumene. I never compensated for loss on ignition when I
did that, and it didn't seem to make any difference. The other method is
to make the glaze up way ahead of time with lots of extra water. Let it
settle and siphon the water off. Do this a couple of times and the foaming
will stop.
Paul Lewing, Seattle
Jennifer Boyer on thu 20 jan 05
Hi Susan,
No problem. It's fun to harness with the power of so many potters. I've=20=
decided to ditch most of my antique glaze ingredients. I went in on a=20
Goddard College bulk order from Standard when I was first setting up my=20=
studio in '75. But it pays to order new, since the clay suppliers have=20=
what you will be ordering if the test is good, so why test with=20
obsolete stuff? Took me awhile to come to this...
There are a few exceptions: I have about 30 lbs of RIO left: my=20
lifetime supply!
I'll pass this on the the group.
Take Care
Jennifer
On Jan 20, 2005, at 7:40 AM, susan kuehnl wrote:
> hi jennifer,
> =A0=A0=A0 that's terrific!=A0 less than 24 hours later and=A0four =
things to=20
> try!!=A0 i'll start with the alcohol (the quick fix) and move on to =
the=20
> over-abundance-of-water trick.=A0
> =A0=A0=A0 i bet the spodumene is totally vintage.=A0 i'm sure i've =
been=20
> dragging it around for years; i certainly haven't tried using it for=20=
> years.=A0 next time dick comes i'll get some fresh stuff.
> =A0=A0=A0 thanks so much for taking charge of the 'research' on this; =
i=20
> really appreciate your time.
> susan
>
************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
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