Roxanne Hunnicutt on thu 10 may 12
>
> A couple of my friends have been having trouble with a couple of glazes
>> since they bought new spodumene. A glaze guru friend said she had a
>> favorite glaze that she had to abandon when she changed spodumene.
>>
>> So, my question is: do you know what kind of spodumene you have? I
>> looked at the glaze master and it shows three that are different enough
>> that it they offer them for glaze calculation sake. They are Foote,
>> Gwalia, and Tanko.
>>
>
>
>> The Spodumene that I have was probably purchased in 1979 from Southern O=
R
>> Pottery Supply and I have no clue what it could be! I had no idea there
>> were individual names! Does anyone or Ron Roy have ideas on this?!
>>
>
> Is the cure just to know and use the formulas or is the new spodumene bad
> in some way?
> Roxanne in OR
>
ronroy@CA.INTER.NET on fri 11 may 12
Hi Roxanne,
Dick has it right - what I need to know is - what colour was the old
spod - I will assume the new spod sparkles.
Send me recipes and I'll convert them.
RR
Quoting Roxanne Hunnicutt :
>>
>> A couple of my friends have been having trouble with a couple of glazes
>>> since they bought new spodumene. A glaze guru friend said she had a
>>> favorite glaze that she had to abandon when she changed spodumene.
>>>
>>> So, my question is: do you know what kind of spodumene you have? I
>>> looked at the glaze master and it shows three that are different enough
>>> that it they offer them for glaze calculation sake. They are Foote,
>>> Gwalia, and Tanko.
>>>
>>
>>
>>> The Spodumene that I have was probably purchased in 1979 from Southern =
OR
>>> Pottery Supply and I have no clue what it could be! I had no idea ther=
e
>>> were individual names! Does anyone or Ron Roy have ideas on this?!
>>>
>>
>> Is the cure just to know and use the formulas or is the new spodumene ba=
d
>> in some way?
>> Roxanne in OR
>>
>
Dick White on fri 11 may 12
The Foote spodumene was mined in North Carolina from the late 1930s until=
=3D
1986, and is no longer available. It was a dirty gray color. The Tanco
spodumene was mined in Manitoba, Canada until 2009, but that mine is now
also closed though there may be some stocks still in storage as it has on=
=3D
ly
been a few years. It was described in the industrial literature as a
low-melt spodumene concentrate, but also found its way into the pottery
world. It is a white powder. The Gwalia spodumene is from Australia, and =
=3D
it
is white and sparkles a bit if you hold a handful of it up in bright
sunlight. As you noted from the analyses in Glazemaster, they are quite
different, but you could probably adjust your recipe from one to the othe=
=3D
r.
As with so many of our glaze source materials, we potters are a low-prior=
=3D
ity
secondary market for industrial products. As industrial needs and markets=
=3D
change together with the economics of production for those changing needs=
=3D
(specifically as to spodumene, think of the exploding demand in recent ye=
=3D
ars
for lithium ion batteries...), the sources and availabilities of our trie=
=3D
d
and true glaze materials shift as well.
cheers
dw
Sandy miller on wed 16 may 12
Is there anyone on the list who would like 100# of Foote Spodumene? I
would love to get rid of it.
I am in Painesville, OH. I will be traveling to NY. July and Aug. and
Evanston, IL in August.
Happy potting!
Sandy Miller
www.sandymillerpottery.com
On Thu, May 10, 2012 at 9:44 PM, Roxanne Hunnicutt wrote=
:
> >
> > A couple of my friends have been having trouble with a couple of glazes
> >> since they bought new spodumene. A glaze guru friend said she had a
> >> favorite glaze that she had to abandon when she changed spodumene.
> >>
> >> So, my question is: do you know what kind of spodumene you have? I
> >> looked at the glaze master and it shows three that are different enoug=
h
> >> that it they offer them for glaze calculation sake. They are Foote,
> >> Gwalia, and Tanko.
> >>
> >
> >
> >> The Spodumene that I have was probably purchased in 1979 from Southern
> OR
> >> Pottery Supply and I have no clue what it could be! I had no idea the=
re
> >> were individual names! Does anyone or Ron Roy have ideas on this?!
> >>
> >
> > Is the cure just to know and use the formulas or is the new spodumene b=
ad
> > in some way?
> > Roxanne in OR
> >
>
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