is part four of a multi-part series on devitrification. Click
here to go to part one.
9. Once devitrification occurs, it
can't be removed by simply cleaning and re-firing. Instead,
the top surface of the glass must be physically removed.
Sandblasting is the most common way of doing this. After
blasting, the glass must be refired in order to regain a shine.
10. It's possible to coat a
devitrified surface with a devit spray (such as Spray "A", Super
Spray, or a borax solution) and then refire, but this is only
occasionally successful in covering up the devitrification crystals.
11. And finally, although most people
consider devitrification to be something to be avoided, it is
possible to encourage the process and use the devitrification
crystals as a unique design element. A future warm tip will
concentrate on this technique and on ways to encourage and control
Copyright 2005 Brad Walker.
All rights reserved.