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manganese purple 06-04?

updated sat 9 feb 02


George Mackie on thu 7 feb 02

In the days of lead glazes I could get beautiful violets with manganese
oxide but all my current alkaline or boron glazes give grungy reddish
browns. Hamer & Hamer say " glazes high in alkali and low in alumina can
be given a beautiful violet colour with 1-3% manganese oxide" so I thought
I would try frit 3134 by itself, as it has no alumina and quite a lot of
alkaline components, but it didnt work either. Could boron be the culprit?
More to the point can any kind clayartist give me recipe for a good
reliable, non-crazing, cone 06-04, manganese purple or violet glaze?