Glass Tips from Verrier

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...

Will stress still show with polarised filters on cracked and broken glass? It's not a straightforward answer. I was looking at some ...

Polarised light filters are used to detect stress in a non-destructive testing method in kilnforming.   The use of the filters is described ...

Using polarized light filters to show stress works on the principle that stressed glass  rotates the polarisation direction of the  light a...