LJTCW@AOL.COM on thu 31 may 01
A friend asked me to post this message.=A0 Hopefully someone can help.
"I need a low expansion smooth matt glaze for cone 6. One that is semi-opaqu=
e=20
which colorants could be added to. I am working with a cone 6 porcelain and=20
all the smooth matt glazes I have tried craze."
Thanks,
Louise
Louise Jenks
Turtle Clayworks
Cincinnati OH USA
Paul Lewing on thu 31 may 01
> "I need a low expansion smooth matt glaze for cone 6. One that is semi-opaqu=
> e=20
> which colorants could be added to. I am working with a cone 6 porcelain and=20
> all the smooth matt glazes I have tried craze."
I recently made what I think is about what your friend wants at cone 4
in oxidation by modifying Tony Hansen's 5x20 recipe (equal parts by
weight of Custer, wollastonite, frit 3134, EPK and silica). I
substituted talc (magnesium silicate) for the wollastonite (calcium
silicate). Made a very nice satin matt almost-clear. If that's not
matte enough at cone 6, I'd bet that a substitution of 10 talc and 10
magnesium carbonate for the 20 wollastonite would get closer to the
matteness desired. Add a little tin oxide or zircopax to opacify it,
and you're there.
Paul Lewing, Seattle
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