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Devitrification
This
is part two of a multi-part series on devitrification. Click
here to go to part one.
Things to know about devitrification:
1. Unclean glass can contribute to the
formation of devitrification, as can dusty conditions inside the
kiln.
2. Almost anything in the kiln that
burns off during firing, such as binders, glues, etc., can increase
the likelihood of devitrification. Adequate ventilation of the
kiln during the burn-off phase (up to 1000F/540C) will help prevent
this problem.
3. Devitrification is much less likely
to occur in glass that is moving, as in a pot melt or crucible pour.
4. Although devitrification can occur
anywhere above about 1100F/600C, it is much more likely to occur
when the temperature exceeds 1300F/700C. The longer the glass
spends at the higher temperature, the more likely it is to devitrify.
Click
here for more about devitrification.
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Copyright 2005 Brad Walker.
All rights reserved.
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