Nan Dufresne on fri 2 aug 96
Can anyone tell me what sodium fluosilicate is or what can be used in place
of it? It is listed as a glaze ingredient in many of recipes in James
Chapell's book, The Potter's Complete Book of Clay and Glazes". It is not
listed in his glossary and the two chemical suppliers I've contacted don't
know anything about it. As far as I recall, the glaze recipes were all
earthenware types.
Thanks, Nan
Erich on sat 3 aug 96
Nan Dufresne wrote:
>
> ----------------------------Original message----------------------------
> Can anyone tell me what sodium fluosilicate is or what can be used in place
> of it? It is listed as a glaze ingredient in many of recipes in James
> Chapell's book, The Potter's Complete Book of Clay and Glazes". It is not
> listed in his glossary and the two chemical suppliers I've contacted don't
> know anything about it. As far as I recall, the glaze recipes were all
> earthenware types.
> Thanks, Nan
Hi Nan,
In search an the Internet I found 17 references to sodium fluosilicate, one is
Corning Glass. In case nobody has a answer call Corning Glass Works or some of
the listed universities.
Aloha nui noa Erich
http://www.flex.net/~justice/dowcrn1.htm
Dr. Hyde's Group at Corning Glass Works expands to take on JOE
DOMICONE and MARY PURCELL ROCHE, DR. WILLIAM DAUT
(Harvard University) and Bob Fleming (Cornell University), a chemist.
These two men experimented with forming organosilicones from
lithium AND sodium fluosilicate in order to replace the expensive
Grignard technique for producing materials. Project was dropped for
being itself too costly. BOB FLEMING of Corning Glass Works
contributed his research into isolating the characterization of
CYCLICS (compounds with atoms arranged in a ring or closed-chain
structure) from the DIMETHYLSILOXANE compound.
David Hewitt on wed 7 aug 96
Re:- Digest of the 2nd to 3rd August
I have found a reference to sodium silicofluoride (Na2SiF6) which may be
of use you you. The following is from 'Ceramics Glaze technology' by J R
Taylor & A C Bull.
This is a synthetic compound obtained from the neutralisation of
hydrofluosilicate acid with sodium carbonate. It is a stable
compound in storage if kept dry. As a flux and an opacifier it
is widely used, often as a substitute for sodium fluoride.
David Hewitt
David Hewitt Pottery Caerleon, Newport, Gwent, UK.
URL http://digitalfire.com/magic/hewitt.htm
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