Marcia Selsor on wed 20 feb 08
Magnesium Oxide is a light fluffy flux that will turn cobalt lavendar
when it is present in a glaze. Dolomite is a common source of Magnesium.
Manganese frequently "dioxide" is a dark heavy metal and blamed for
nerve deterioration when the fumes are inhaled frequently. It is
blamed for David Shaner's demise.
Manganese is used to color glazes deep purple to browns and sometimes
added for blacks.
Chemical symbols are MnO for Manganese and MgO for Magnesium
Marcia Selsor
On Feb 19, 2008, at 11:14 PM, Sally Guger wrote:
> I've only used my 200 gram sample of this glaze -but it's a very
> nice satin matt deep purple color- seemed to be a good fit on white
> or a dark tan clay. I probably found it in the archives- don't know
> what RR thinks of it, I hope its food safe. I use pre-'99 GB.
> Could someone tell me the difference between magnesium and
> manganese? I have some of both. Thanks. Sally
>
> Semi-gloss Eggplant
> 45.7 Soda Feldspar
> 15.2 Flint
> 12.7 Talc
> 12.9 Gerstley Borate
> 9.0 Dolomite
> 4.5 EPK
>
> Add:
> 1.0 Bentonite
> 2.0 Cobalt Carbonate
> 5.0 Manganese Carbonate
>
>
>
Marcia Selsor
http://marciaselsor.com
| |
|
