Ivor and Olive Lewis on thu 1 feb 07
Dear John Post,=20
This post may have got lost in the recent hiatus.
One problem as I see it is that the colour of the Copper oxide and the =
opacity from the Rutile has obscured the qualities of the basic glaze =
fabric..
The other, again as I see it, is that incorporating O.3 mols of NaKO, =
which must come from the Frit prevents us from isolating the behaviour =
of Zinc oxide. Using a frit provides a solvent environment in which Zinc =
Oxide, Silica and Kaolin can dissolve.
One thing is well known about Zinc oxide as a flux is that it modifies =
viscosity of a molten batch to an extent that it make glazes that flows =
better than hot water. The higher the Zinc oxide content the more a =
molten glaze will run, a fact well know by those who have perfected the =
art of Zinc Crystal Glazing.
I would be interested to know what the question was that you sought to =
answer with this research. I think repeating the test but using four =
basic recipes that contained no frit, copper oxide or rutile would be =
more informative.
Well done and well presented.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Ivor and Olive Lewis on thu 8 feb 07
Dear John Post ,
Thank you for your post. Knowing the roots and history of an idea can be =
quite important.
I look forward to learning about your future tests when they are =
completed. Which ever way things go, such empirical knowledge can be of =
use to many people.
Best regards,
Ivor Lewis
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