Robert Santerre on mon 29 jan 01
Wade, please help us out here. What is Rottenstone? Why would you add it to a
cone 10 glaze? What were the nice results you obtained?
Thanks, Bob
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Wade Blocker wrote:
> Sarah,
> You should be able to find Rottenstone in a large Hardware store, or
> builders supply place. Look in the paint department. I have added
> rottenstone to a cone 10 glaze with very nice results. Mia in ABQ
>
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Wade Blocker on mon 29 jan 01
Sarah,
You should be able to find Rottenstone in a large Hardware store, or
builders supply place. Look in the paint department. I have added
rottenstone to a cone 10 glaze with very nice results. Mia in ABQ
Wade Blocker on tue 30 jan 01
Bob,
Rottenstone is a decomposed siliceous limestone.
I added either 5 or 10% to the following glaze,fired in a reduction
atmosphere to cone 9-10.
Carlton Ball MG2 White Matt
Soda spar 27.0
Ball Clay 7.5
Colemanite ll.9
Dolomite 8.7
Talc 19.6
Flint 25.2
This is an opaque waxy glaze. When rottenstone was added it became
whiter, increased the opacity, and was a "feely" glaze. Why did I add it?
Just to see what would happen to one of my favorite glazes. Mia in ABQ
Anita Rickenberg on wed 31 jan 01
I don't know what quantities you need, but I just did a search and found =
a couple of sources for rotton stone by the pound:
http://www.clock-keys.com/pdf/page-105.pdf
http://www.dellsleatherworks.com/Rotten%20Stone.htm
The prices were approx. $3.00/lb. What I would probably do if I =
couldn't find another source is to order a couple bags and see if the =
manu. and location is listed on the packaging.
Anita
Roger Korn on wed 31 jan 01
Sarah Barnes wrote:
Hi.
I have been reading "Out of the Earth Into the Fire" and am
wondering how to
find Rotten Stone. The author does list the company name
(Empire White
Products) but the phone company alas has no listing for them.
Can anybody
help?
Thanks
Sarah Barnes
M.I.C.A. Ceramics
As a woodworker, I use rotten stone as a component in polishes and
rubbed finishes. Rotten stone is 200- grit powdered pumice. Sources are
stores catering to fine woodworkers and REAL hardware stores (the kind
where the clerks are in their 60s and 'know what stuff is'). Also used
as a metal polish. Here in the Pacific Northwet, I find pumice stones
laying around and just grind them up in a mortar and pestle, then sieve
to size.
Roger Korn
McKay Creek Ceramics
Liz Willoughby on wed 31 jan 01
For those wanting more info on Rotten Stone, there are a few pages
about that material in Out of the Earth, Into the Fire, a book by
Mimi Obstler.
In the first paragraph she says that a synonym of Rotten Stone is
terra cariosa, meaning rotten earth. She describes it as any
"friable, lightweight, earthy residue consisting of fine-grained
silica and resulting from the decomposition of siliceous limestone
(or of a shelly sandstone) whose calcerous material has been removed
by the dissolving action of water," (Glossary of Geology 1974, 619).
Supplier: Empire White Products Co., 45 Herman St., Newark, N.J. 07105.
Chemical structure
SiO2 60.65%
Al2O2 17.68
Fe2O2 9.04
KNaO 8.62
CaO+MgO 2.92
Hydroscopic moisture 1.09
Lots more in the article. Very interesting. The book is published
by The American Ceramic Society. 614-890-4700, I believe that there
is a new edition of this book out.
Liz
Liz Willoughby
RR 1
2903 Shelter Valley Rd.
Grafton, On.
Canada
K0K 2G0
e-mail lizwill@phc.igs.net
David McBeth on tue 4 oct 11
I should probably know the answer to this but since I am drawing a blank...
Rotten stone - is referenced in Out of the Earth - Into the Fire as
"resembles feldspar with a high iron and magnesium content." Does anyone
know of a source for this material? thanks
Dave
--
David McBeth
Professor of Art
Department of Visual and Theatre Arts
University of Tennessee - Martin
731-881-7416
John Hesselberth on wed 5 oct 11
Hi David,
Any woodworker's supply store. Just Google rottenstone and you find =3D
plenty. It is usually $6-10/lb.
Regards,
John
On Oct 4, 2011, at 10:45 PM, David McBeth wrote:
> I should probably know the answer to this but since I am drawing a =3D
blank...
>=3D20
> Rotten stone - is referenced in Out of the Earth - Into the Fire as
> "resembles feldspar with a high iron and magnesium content." Does =3D
anyone
> know of a source for this material? thanks
>=3D20
> Dave
>=3D20
> --
> David McBeth
> Professor of Art
> Department of Visual and Theatre Arts
> University of Tennessee - Martin
> 731-881-7416
Carl Cravens on wed 5 oct 11
I thought, "Ha, I know this!" and then John beat me to it. Grandpa used to=
talk about using rotten stone as the final abrasive in fine polishing his =
woodwork. You know you're serious when you finish with the finest grit san=
dpaper, then polish with pumice, then with rotten stone.
--
Carl D Cravens (raven@phoenyx.net)
Don't anthropomorphize computers. They hate that.
Steve Slatin on wed 5 oct 11
David -- woodworking supply houses will have it -- it's used as a polish=3D=
0A=3D
in fairly large quantities (i.e., pound and up) there.=3DA0 Some jewlery su=
pp=3D
ly=3D0Ahouses will also have it, but they call it tripoli, mostly sell it i=
n =3D
smaller=3D0Aquantities, and so it costs more.=3D0A=3D0ASteve Slatin -- =3D0=
A=3D0A=3D0AN=3D
48.0886450=3D0AW123.1420482=3D0A=3D0A=3D0A________________________________=
=3D0AFrom: =3D
David McBeth =3D0ATo: Clayart@LSV.CERAMICS.ORG=3D0ASen=
t: T=3D
uesday, October 4, 2011 7:45 PM=3D0ASubject: Rotten stone=3D0A=3D0AI should=
proba=3D
bly know the answer to this but since I am drawing a blank...=3D0A=3D0ARott=
en s=3D
tone - is referenced in Out of the Earth - Into the Fire as=3D0A"resembles =
fe=3D
ldspar with a high iron and magnesium content."=3DA0 Does anyone=3D0Aknow o=
f a =3D
source for this material?=3DA0 thanks=3D0A=3D0ADave=3D0A=3D0A--=3D0ADavid M=
cBeth=3D0AProf=3D
essor of Art=3D0ADepartment of Visual and Theatre Arts=3D0AUniversity of Te=
nnes=3D
see - Martin=3D0A731-881-7416
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