Eh it seems to stain my red clay with a dusty white that doesn't come off, I have to use sandpaper.
I use a cone six red clay and it comes right off. However when I use it in cone 10 that sometimes happens. I think your clay may be over firing if the alumina gets embedded in the clay. I still use it in cone 10 but I know I will have more clean up and finishing later when I do.
Alumina And Wax
in Studio Operations and Making Work
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I use a cone six red clay and it comes right off. However when I use it in cone 10 that sometimes happens. I think your clay may be over firing if the alumina gets embedded in the clay. I still use it in cone 10 but I know I will have more clean up and finishing later when I do.