Slumping Tack Fused Glass Stringers
here for information on tack fusing glass stringers.
Once you have tack fused your stringers,
you should have a fragile blank, about four stringer layers thick.
It will need to be handled gently and watched carefully during your
When you slump, you should fire very slowly.
While thermal shock is not likely, thin pieces such as this have a
tendency to crack when they bend into the mold if they're fired too
fast. A good firing schedule is to take at least two hours to
reach 1000F/540C, then increase the temperature at about 100F/55C
per hour. Keep watching until the piece slumps into the mold,
then anneal as usual.
For your first attempts, it's a good idea to
use a shallow mold; after you get a feel for the process, you can
attempt a deeper slump.
Copyright 2006 Brad Walker.
All rights reserved.
Thanks to Geri Comstock, Dick
Ditore, and others for their contribution to this tip.