David Cuzick on fri 29 oct 99
Perhaps I have missed something, but all of this information on zinc oxide
and its uselessness does not seem to ring true to me.
I have done several experiments with zinc ox in a few of my glazes and have
found it to have a dramatic and visible effect on the fired glaze. One it
increases fluidity, second it increases transparency and finally it seems to
reduce pinholing. My tests were done using 4% to 5% zinc oxide added to a
cone 10 glaze then fired in a reduction atmosphere. I did not alter any of
the other ingredients in the glazes.
These are my observations, take them for what they are worth.
David Cuzick in San Diego, CA
claycuzian@aol.com
Ron Roy on sun 31 oct 99
Hi David,
This will depend on how soon the glaze melts and how soon you start
reduction. Remember - zinc is a middle range flux and does not do much at
lower temperatures.
RR
>----------------------------Original message----------------------------
>Perhaps I have missed something, but all of this information on zinc oxide
>and its uselessness does not seem to ring true to me.
>I have done several experiments with zinc ox in a few of my glazes and have
>found it to have a dramatic and visible effect on the fired glaze. One it
>increases fluidity, second it increases transparency and finally it seems to
>reduce pinholing. My tests were done using 4% to 5% zinc oxide added to a
>cone 10 glaze then fired in a reduction atmosphere. I did not alter any of
>the other ingredients in the glazes.
>These are my observations, take them for what they are worth.
>
>David Cuzick in San Diego, CA
>claycuzian@aol.com
Ron Roy
93 Pegasus Trail,
Scarborough, Ontario
Canada. M1G 3N8
Tel: 416-439-2621
Fax: 416-438-7849
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