What to Remember from this Tutorial

Here's a summary of the most important points from this tutorial:

  • Thermal shock is caused by uneven heating.
  • Your risk of thermal shock varies from one piece to another and from one kiln to another. That’s why you cannot reliably use generic firing schedules without understanding them.
  • Size, shape color, iridized surfaces and metal inclusions all help determine the risk for thermal shock to your glass.
  • There are a number of steps you can take to reduce risk of thermal shock. The most reliable and easiest step is to slow down the firing.
  • Other ways to reduce risk of thermal shock include using a kiln with elements in the lid, positioning your work near the center of the kiln shelf, and baffling the heat from side elements with kiln-furniture or other suitable materials.

And don't forget to slow down :)

thermal shock

I took a casting class from Phil Teefy-- His Mantra--


I repeat this often and my work fires consistently great.

Added bonus--apply it to other areas of life and the results are miraculous, stress free and and consistently satisfying.

Thanks Paul!



Good information, well presented. 

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