Quote:
Originally Posted by DesertDreamer
In other words, if a bead is properly annealed at whatever the particular temp (>700), would a temperature "test" between 212 and 0 F even matter?
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That was why I suggested the addition of clear beads the same size and shape in each batch, that would confirm that the annealing cycle was executed properly. The freeze/boil test, would be more of a structural strength test, is the shape of the bead strong enough, do any dots/prunts come off. As artisans we want to ensure the highest quality of work, but we need to make sure that our testing methods are equally of high quality and that we are testing what we think we are testing. I'm sure there are some charts somewhere that could be used to calculate how much stress is caused by alternately freezing/boiling a piece of glass. Let me look in my copy of Bandhu's books.