violet colors with Manganous Oxide

[Gonen]

Above 1080C, half of the oxygen disassociates to produce MnO, a flux which immediately reacts with silica to produce violet colors in the absence of alumina, browns in its presence.  https://digitalfire.com/oxide/mno

how do I get this violet?  should I just mix silica (Sio2) powder with mno? 

[Kelly in AK]

I don’t think it’s exactly that simple, but probably not too difficult either. Glazes usually (always) have silica in them even if it’s not a separate ingredient. Clay, feldspar, and most frits contain silica, and those are major glaze ingredients.

From a little searching I see that purples/violets from manganese are produced with a very small percentage (2% or less) in concert with an even smaller percentage of cobalt.

Try searching for “manganese violet glaze recipe” or “manganese purple glaze recipe.” to start with and see what you find. 

[PeterH]

30 minutes ago, Kelly in AK said:

Try searching for “manganese violet glaze recipe” or “manganese purple glaze recipe.” to start with and see what you find. 

... but be aware that "manganese violet" is also the name of an organic artists pigment (i.e. low temperature only?).
https://en.wikipedia.org/wiki/Manganese_violet

[Min]

 In general terms you are looking for a high alkaline with low alumina base glaze with manganese to make purple. It tends to be a liver colour purple without a titch of cobalt added.

edit: is it for glaze you are asking or a wash or ?

Edited June 15, 2023 by Min

[PeterH]

If this reference is representative "vivid" manganese purples may be fairly thin on the ground.
A Plethora of Purple: Glaze Recipes for Earthenware, Stoneware and Porcelain
https://ceramicartsnetwork.org/daily/article/A-Plethora-of-Purple-Glaze-Recipes-for-Earthenware-Stoneware-and-Porcelain

The manganese containing purples illustrated are:

But here are well-lit examples of a very dark glaze with character from https://gotheborg.com/glossary/aubergine.shtml

... so maybe it's worth trying "aubergine" or "eggplant" as a search term.

There is an aubergine glaze recipe without a picture at:

... As reported elsewhere closed threads are not searched by this sites search engine. So such postings can only be found using a search engine such as google. In this case searching for 
"aubergine gloss glaze" site:community.ceramicartsdaily.org

Edited June 17, 2023 by PeterH