[Clayart] High Magnesia glaze colorants?

Paul Herman potterpaul at frontiernet.net
Tue Jan 19 23:09:45 EST 2016


Some high magnesia ^10 glazes respond to cobalt in a spectacular way. With a large percentage of cobalt, in the 3 to 5% range, they will make a remarkable pinkish purple. The pink/purple micro crystals float on top of the deep blue glass. I would try a line blend of cobalt, increasing from 2% to 6%. I think it might be pyroxine under the influence of cobalt.

Good luck,

Paul Herman

Great Basin Pottery
Doyle California
potterpaul at frontiernet.net

On Jan 19, 2016, at 7:08 PM, Owen Dearing via Clayart <clayart at lists.clayartworld.com> wrote:

> I have been working with a high magnesia base glaze and am ready to start experimenting with  adding color. Can you all give me some ideas of oxides that play nicely with a high magnesia glaze for cone 10 reduction firing? And oxides to stay away from? Am thinking of oxides to use in triaxial blends and not finding much specific info in my library or online. Thanks!
> Owen
> Owen Dearing, potter
> Bend, Oregon
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