Michelle Lowe on thu 10 aug 00
Hi all,
Asking for a friend who is using cassius, she is looking for an opaque base
glaze that works on it (it's a black cone five body), and some stains or
oxides that may contrast well. Anyone have a tried and true? Thanks, for
Bridget :)
Michelle Lowe, potter in the Phoenix desert \|/ |
mishlowe@amug.org -O- | |
mishy@desertdragonpottery.com /|\ | | |
|_|_|
http://www.desertdragonpottery.com ____ |
http://www.amug.org/~mishlowe -\ /-----|-----
( )
<__>
CINDI ANDERSON on sat 12 aug 00
When I first used this clay I put glazes on it, but I stopped because it
is so beautiful by itself, with just a clear glaze. Sometimes I will
draw designs with slip, but I don't cover much of the clay.
Cindi
-------------------
Michelle Lowe wrote:
>
> Hi all,
> Asking for a friend who is using cassius, she is looking for an opaque base
> glaze that works on it (it's a black cone five body), and some stains or
> oxides that may contrast well. Anyone have a tried and true? Thanks, for
> Bridget :)
> Michelle Lowe, potter in the Phoenix desert \|/ |
Milton Markey on sat 12 aug 00
Hi Michelle!
Cassius Basaltic clay, made I think by IMCO, near Sacramento, CA, produces
it's own sheen, when it's properly fired. Because of it's high iron and
maganese content, color oxides don't show on this already dark clay. I
suggest that you enjoy the finished product as is--a very beautiful mid-fire
dark black clay. I know of one fellow Cassius clay ceramicist who uses
acrylic paint over a finished piece. I don't recommend this, since the clay
isn't too absorbant after it vitrifies, and the paint may peel off.
A similar clay, Black Mountain, made also by the same manufacturer, vitrifies
at cone 10. When fired in reduction, it also a "self-shining" clay--very
beautiful results. I use this clay for most of my dark-clay applications. I
have used very deep-colored underglazes on this clay, with disappointing
results. One word of caution: fire these clays carefully. Their contents
sometimes bloat, when overfired.
I understand IMCO stands behind its products. If you note unusual bloating,
take any unused clay back to where you bought it, and exchange it for a new
batch.
Best wishes!
Milton NakedClay@AOL.COM
| |
|
