Manganese dioxide vs manganese carbonate in Glazy calc

Materials
#1

I was looking at a bronze glaze by [Ruth Gillet #4576] (Glazy) and amending it to use the materials I have. When I substituted manganese dioxide for manganese carbonate the resulting MnO was treated completely differently see #143794.

The carbonate in #4576 was included with R2 but the dioxide in #143794 is shown just as a colourant. I referred to Digital Fire for the adjustment from carbonate to dioxide and altered all the other materials in #4576 before I changed the carbonate to dioxide #143793, so that I could make sure the glaze was in the same general area on Stull. The glaze looked pretty similar until I changed the manganese and then it went off the Stull chart. Why are the two materials treated so very differently in the Stull analysis?

#2

Hi Julie, just saw your IG post and commented there. This Wiki is defunct, you can now post questions and comments directly in Glazy by creating a New Post (14. Posts - YouTube) or adding a comment directly to a recipe or material. I’ve made some updates to this wiki to make it more apparent that it is dead, but I don’t want to take down this wiki because there is still valuable info here.

1 Like
#3

Thanks very much Derek. Because there is a link to ceramicswiki I didn’t realise it was no longer active. And thanks for the INsta feedback. Julie