Oops

[johnridley]

Well that didn't work so hot. The glass shattered at 89*C, worse than the thin stuff.

• Clark Wierda - You might need to figure out a way to slow down the rate of heating.
  
• John Ridley - I did, I turned the voltage down to 18v. At 24v it hit 110 in 70 seconds. This time it took 4 minutes to hit 89 degrees where it cracked.
  I have sheets of pyroceram coming. That stuff can be heated to >700 degrees and then throw ice cubes on it without harm.