Dave Finkelnburg on wed 31 dec 03
Tim,
I don't doubt your experience, but I have to wonder why a glaze would
care whether the phosphorous in it came from tricalcium phosphate or cow
bones. Did you have analyses of both and substitute one for the other based
on that? Is there a difference in particle size? I don't know what recipe
you use or what cone you fire to, but it just doesn't seem logical that the
phosphorous source alone is affecting the color of the iron in your glaze.
There must be something else at work, too. I'd even be interested in
testing different bone ash or calcium phosphate raw materials in the same
glaze recipe and firing them together. This puzzles me! :-)
Happy New Year!
Dave Finkelnburg
----- Original Message -----
From: "Tim Havens"
Sent: Wednesday, December 31, 2003 5:50 PM
- can't get tri calcium phosphate
> to tickle the lithium into pinching the iron orange.
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