Dwiggins, Sandra (NCI) on sat 9 jan 99
Dear Wonderful Resource People:
I have a student who has become enthralled with a bas-relief technique in which
you paint wax or shellac on almost leather-hard clay, then wash off the clay
around the wax/shellac design. When the pot is bisqued, the surface with the
wax/shellac is slightly raised. It's not exactly a carved surface, but sort-of.
Anyway, the community center does not have any decent translucent glazes which
break nicely and would make this slightly raised surface look really nice,
especially on porcelain. We fire to ^6 oxidation. Any recommendations for
something nice? The woman's a painter and does really lovely surface decoration
and I want to encourage her in this direction.
Thanks for your help.
Sandy
Jennifer Assinck on tue 12 jan 99
Dear Sandra and everyone on Clayart:
After lurking for a few months, I am so pleased to find an opportunity,
as a beginner potter, to contribute some information.
I have had success with a couple of faux celadon Cone 6 glazes. (True
celadons are iron glazes fired in reduction at ~ ^10, to produce
translucent glazes that pool in recesses.)
Celadon to Teal (^6 OX)
21 Gerstley Borate
8 Wollastonite
30 Nepheline Syenite
10 Kaolin
31 Silica
add oxides, as described below:
For green, add cobalt carbonate 0.125% and chrome oxide 0.125%
For teal blue, add cobalt carbonate 0.5% and chrome oxide 0.3%
For teal green add cobalt carbonate 0.5% and chrome oxide 0.5%.
Faux Celadon (^6 OX)
50.00 Soda Feldspar (Kona, Minspar 4)
20.00 Wollastonite
10.00 China Clay
10.00 Silica
10.00 Gerstley Borate
add:
0.50 Copper Carbonate
0.20 Black Stain
This turned out as a blue celadon. You could experiment with other
oxides and/or stains.
While these glazes fit my Cone 6 porcelain stoneware just fine, be sure
to test for fit with your own clay.
Have fun!
Jennifer Assinck
Newmarket, Ontario (just north of Toronto)
Dwiggins, Sandra (NCI) wrote:
> ----------------------------Original message----------------------------
> Dear Wonderful Resource People:
> I have a student who has become enthralled with a bas-relief technique in whic
> you paint wax or shellac on almost leather-hard clay, then wash off the clay
> around the wax/shellac design. When the pot is bisqued, the surface with the
> wax/shellac is slightly raised. It's not exactly a carved surface, but sort-o
> Anyway, the community center does not have any decent translucent glazes which
> break nicely and would make this slightly raised surface look really nice,
> especially on porcelain. We fire to ^6 oxidation. Any recommendations for
> something nice? The woman's a painter and does really lovely surface decorati
> and I want to encourage her in this direction.
>
> Thanks for your help.
> Sandy
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