I recently attempted to enlarge the holes in a pair of glass beads
by drilling them out with diamond drill bits of progressively larger
sizes, while submerged under water for cooling. Both of the beads
split in half under moderate pressure. Fortunately, they were not
expensive beads. Since I’ve successfully drilled out glass beads
numerous times in the past, I was quite surprised by this result.
Are there any glass artists out there who might be able to shed some
light on why this might have happened to these beads, but not to the
majority of others I’ve handled similarly? Are there different glass
"recipes" or production methods that make some beads more fragile
Thanks in advance for any thoughts on this.
Linda in central FL