Last Updated: Jul 19, 2016 Views: 233
Thank you very much for your question. The article "Annealing and Pre-Annealing Your Beads" by Donna Milliron, The Bead Release, May 1996 v. 3 no 2. pp. 1-2, addresses the question of annealing beads.
The question do beads need to annea in a kiln is a valid and important question.
can beads be placed in a pot of cold vermiculite
a pot of vermiculite on a burner
a shallow pan of vermiculite on a burner
a heated crock-pot full of vermiculite
surround the bead in thick ceramic fiber
a coffee can at the tip end of a torch filled with vermiculite
"Most of them raced right on through the annealing ranges and almost straight down until around 300 degrees F, where they began to slow down and level off to room temperature. In other words all of these methods do basically one thing - prevent thermal shock until you have an opportunity to anneal them. All of these beads would be essentially "little tiny time bombs" because they cool so fast."
Thus the beads should be annealed in a kiln to prevent breakage.
Bandhu Scott Dunham's book, "Contemporary Lampworking: a Practical Guide to Shaping Glass in the Flame" has a great chapter regarding annealing.
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