OK, I put three beads from Austin Hamilton, which he claims are annealed, into my glass kiln. I fired these in a kiln washed pyrex bowl. I followed a kiln firing schedule from a famous lampworker, which was heat up to 920 F, at a rate of 1000 degrees per hour, hold for 20 minutes. Turn off the kiln, let cool naturally down to room temperature. The results: none of the beads cracked. So...I know this is a small sample, but maybe they do anneal their beads. I would welcome all lampworkers and all others on the n/g's opinion on this.
Patti