Glass Tips from Verrier

Why is the stress not relieved after the strain point when slumping? The answer relates to whether it is on the cool or on the heat up. Co...

From time to time the assertion is that a break during the heat up of a blank while slumping is the result of residual stress remaining in a...

 This is a presentation I gave a while ago on why and how to test for stress without risking the piece, that is, non-destructive testing.

An stress test strip and annealing witness between polarised filters. If an unbroken fired piece shows stress that is known not to be from ...

Testing for stress is one of the most important elements in kilnforming.  It may not look like there is stress when there is considerable am...