Hank Murrow on fri 18 jan 02
>I calcined the oyster shell and am ready to do some tests in cone 9. It has
>been ground and sieved at 60 mesh. I forgot what the oyster shell is a
>sub for? It is a source of calcium so I guess that might mean where ever
>Whiting is called for? Any cone 9 recipe's out there I should give a
>try? Lots of glazing to be done before I am ready for another
>fire. Anxious to see yet another load of wares come out of the furnace.
>
>Llewellyn
>
Dear Llewellyn;
I think it will resemble whiting, as will egg shells.
Cheers, Hank
Paul Herman on fri 18 jan 02
Hi Llewellyn,
When you calcined that oyster shell, you turned it into calcium oxide
(quicklime). That stuff is water soluble and caustic. Careful! A better
plan might be to simply grind it to a powder and use it like that.
Oyster shells are mostly calcium carbonate (whiting).
Good Luck,
Paul in Doyle
----------
>From: Llewellyn Kouba
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Oyster shell in a glaze
>Date: Fri, Jan 18, 2002, 2:41 PM
>
> I calcined the oyster shell and am ready to do some tests in cone 9. It has
> been ground and sieved at 60 mesh. I forgot what the oyster shell is a
> sub for? It is a source of calcium so I guess that might mean where ever
> Whiting is called for? Any cone 9 recipe's out there I should give a
> try? Lots of glazing to be done before I am ready for another
> fire. Anxious to see yet another load of wares come out of the furnace.
>
> Llewellyn
>
> ______________________________________________________________________________
> 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.
>
noel oard mapstead/keiko suga on fri 18 jan 02
i always use calcined abalone shells when whiting (calcium carbonate) is
called for. i use it always in human bone ash glazes
noel
> I calcined the oyster shell and am ready to do some tests in cone 9. It
has
> been ground and sieved at 60 mesh. I forgot what the oyster shell is a
> sub for? It is a source of calcium so I guess that might mean where ever
> Whiting is called for?
Llewellyn Kouba on fri 18 jan 02
I calcined the oyster shell and am ready to do some tests in cone 9. It has
been ground and sieved at 60 mesh. I forgot what the oyster shell is a
sub for? It is a source of calcium so I guess that might mean where ever
Whiting is called for? Any cone 9 recipe's out there I should give a
try? Lots of glazing to be done before I am ready for another
fire. Anxious to see yet another load of wares come out of the furnace.
Llewellyn
Lee Love on sat 19 jan 02
----- Original Message -----
From: "Llewellyn Kouba"
> I calcined the oyster shell and am ready to do some tests in cone 9. It has
> been ground and sieved at 60 mesh.
Maybe too late this time, but in the future, you could fill them with wadding
and then place pots on them. You might get some flashing on the foot of the
pot.
A potter here in Mashiko, (I met on my first trip here in '93) who fired in
electric reduction, put his pots on shells with rice husk ash, to get woodfired
type flashing on the bottom of his pots. I've seen a couple pots fired
just with shells in gas reduction at work (on some shells as used in the
Noborigama) and they had nice pink flashing. I think these were some kind of
test.
--
Lee Love
Mashiko JAPAN Ikiru@kami.com
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Llewellyn Kouba on sat 19 jan 02
Thanks Hank,
I will have some fun in this upcoming glaze kiln with some test tiles and
see what develops. Today I am firing a (second) bisque with the electric
to catch up some more items for the larger glaze kiln. I always find
something in a load to swap, mix or match or forgot that ordered piece
etc..Monday I hit the glaze buckets.
Lewy
At 06:07 PM 1/18/2002 -0800, you wrote:
> >I calcined the oyster shell and am ready to do some tests in cone 9. It has
> >been ground and sieved at 60 mesh. I forgot what the oyster shell is a
> >sub for? It is a source of calcium so I guess that might mean where ever
> >Whiting is called for? Any cone 9 recipe's out there I should give a
> >try? Lots of glazing to be done before I am ready for another
> >fire. Anxious to see yet another load of wares come out of the furnace.
> >
> >Llewellyn
> >
>
>Dear Llewellyn;
>
> I think it will resemble whiting, as will egg shells.
>
>Cheers, Hank
>
>______________________________________________________________________________
>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.
Llewellyn Kouba on sat 19 jan 02
Hi! Paul,
Thanks much for the info on oyster shell. I had no idea the stuff was
caustic so in future will take extra precautions with it.
Lewy
At 08:39 PM 1/18/2002 -0800, you wrote:
>Hi Llewellyn,
>When you calcined that oyster shell, you turned it into calcium oxide
>(quicklime). That stuff is water soluble and caustic. Careful! A better
>plan might be to simply grind it to a powder and use it like that.
>Oyster shells are mostly calcium carbonate (whiting).
>Good Luck,
>Paul in Doyle
>
>----------
> >From: Llewellyn Kouba
> >To: CLAYART@LSV.CERAMICS.ORG
> >Subject: Oyster shell in a glaze
> >Date: Fri, Jan 18, 2002, 2:41 PM
> >
>
> > I calcined the oyster shell and am ready to do some tests in cone 9. It has
> > been ground and sieved at 60 mesh. I forgot what the oyster shell is a
> > sub for? It is a source of calcium so I guess that might mean where ever
> > Whiting is called for? Any cone 9 recipe's out there I should give a
> > try? Lots of glazing to be done before I am ready for another
> > fire. Anxious to see yet another load of wares come out of the furnace.
> >
> > Llewellyn
> >
> >
> ______________________________________________________________________________
> > 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.
> >
>
>______________________________________________________________________________
>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.
Jim Bozeman on sat 19 jan 02
Hi Lllewelleyn, The glaze goes bad after several days because it becomes very thixotropic. Don't breathe the calcined oyster shells dust! It re-acts with the moisture in the nostral membrane and the eyes! Very bad. But I love using it. I use 10 percent. I like the results better than whiting. Good luck, Jim
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Harry in Iowa on sun 20 jan 02
If you have actually made quicklime, not only is it caustic it will react
strongly with water and get hot. I use this at work to make milk of lime. My
water is 53 deg. F. mix lime and the discharge is 170 deg. F. If mixed too
strong it will boil. Be carefull with it.
Harry in Iowa
----- Original Message -----
From: "Llewellyn Kouba"
To:
Sent: Saturday, January 19, 2002 10:00 AM
Subject: Re: Oyster shell in a glaze
> Hi! Paul,
>
> Thanks much for the info on oyster shell. I had no idea the stuff was
> caustic so in future will take extra precautions with it.
>
> Lewy
>
> At 08:39 PM 1/18/2002 -0800, you wrote:
> >Hi Llewellyn,
> >When you calcined that oyster shell, you turned it into calcium oxide
> >(quicklime). That stuff is water soluble and caustic. Careful! A better
> >plan might be to simply grind it to a powder and use it like that.
> >Oyster shells are mostly calcium carbonate (whiting).
> >Good Luck,
> >Paul in Doyle
> >
> >----------
> > >From: Llewellyn Kouba
> > >To: CLAYART@LSV.CERAMICS.ORG
> > >Subject: Oyster shell in a glaze
> > >Date: Fri, Jan 18, 2002, 2:41 PM
> > >
> >
> > > I calcined the oyster shell and am ready to do some tests in cone 9.
It has
> > > been ground and sieved at 60 mesh. I forgot what the oyster shell is
a
> > > sub for? It is a source of calcium so I guess that might mean where
ever
> > > Whiting is called for? Any cone 9 recipe's out there I should give a
> > > try? Lots of glazing to be done before I am ready for another
> > > fire. Anxious to see yet another load of wares come out of the
furnace.
> > >
> > > Llewellyn
> > >
> > >
> >
____________________________________________________________________________
__
> > > 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.
> > >
> >
>
>___________________________________________________________________________
___
> >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.
>
>
____________________________________________________________________________
__
> 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.
>
>
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