Glass Tips from Verrier

  The cracks around the wire imbedded in the glass in the above image are not incompatibility cracks. They do not surround the square piec...

" I have seen recommendations for slower than ASAP rates from the top temperature, but most schedules say 9999 or ASAP.  Which is right...

The Identification of stress is important in investigating the causes of stress. We have well established clues to help us with our glass se...

Credit: https://immermanglass.com/about-kilnforming/cracks/ The speculation about breaks caused by inadequate annealing of the piece on the ...

 A power point presentation I made a few months ago to the group Lunch with a Glass Artist. It is 33 slides long. Kilnforming with 3mm Glass...

Questions such as “ How compatible are Wissmach W90 and Bullseye?” are asked from time to time.   This does show some awareness that Bul...

A frequently asked question is “how many times can I re-fire my piece?” This is difficult to answer as it relates to the kind of glass a...

    This graph illustrates the effect of a rapid increase (500C/hr) in temperature on the glass.   The blue line represents the air temp...

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

“Double the annealing soak time for each firing” and “Slow the rate of advance each time you fire” are common responses as a diagnosis when ...