Paul Borian on tue 11 aug 09
Does anyone know where I could find some online info about the technical
aspects of bone ash that apply to glazes? I have searched around but
most of what I have found is just a sentence or two. I found a quote
from a page in Hamer's book and some info in digital fire but it was
very brief. Specifically, I am looking for info about how it affects the
glazes, how it compares to other fluxes, what glaze flaws can be
attributed to it and why (and at what percentage would they be likely)
and what it does that enhances the red color in iron reds.
=3D20
I am in the process of removing it from one of my glazes (or cutting
back) but the testing process will be a long one since I only fire
3X/month. The first test was last week but the small batch I mixed had
too much water so it went on too thin to get any appreciable results I
could use for comparison.
=3D20
More specifically (if anyone is interested) I am trying to determine if
bone ash could somehow make the glaze stiffer even though it contains
calcium which would normally be a flux. I know that it is "tri calcium
phosphate" but I don't know what that actually does to the glaze melt.
=3D20
Any info appreciated!
Thanks,
Paul
Russel Fouts on fri 14 aug 09
Paul
What temperature is this glaze?
Russel
Russel Fouts
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