Ms. Nomers, revisited

“Flame annealing”, another favorite of mine.

Folks, there’s no such thing. And for my proof, let’s look at a typical kiln annealing cycle for soft glass:

  1. Hold at 960 F for 1 hour
  2. Drop to 850 F over 30 minutes, hold for 10 minutes
  3. Drop to 500 F over 2 hours
  4. Drop to room temperature over 2 hours

I don’t know anyone who can do that on a torch. Some folks do what they call “flame annealing”, but in reality, they are equalizing the temperature of the piece before allowing it to cool, so that all the parts are of an equal temperature to reduce the possibility of heat stress fracturing.


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