Dave Spangenberg on sun 11 aug 96
Reading Richard Aerni's experience with pinks using rutile and ashes reminded me
of the cure to a chrome-tin pink problem occuring with classroom glazes.
Pink blooms were occurring in the electric kilns on tin opacified glazes where
there was no obvious kiln presense of chrome. After testing glaze constituents
for chrome contamination by substitution of new material, it turned out that the
chrome was contained in wood ashes used as a minor constituent in some of the
glazes. I had been supplying the screened wood ash from my fireplace. The
problem was cured by obtaining the wood ash from a student's fire place.
Most of the wood burnt in my fireplace was grown on my small suburban lot.
Dave Spangenberg 75463.1027@compuserve.com
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