Guy King wrote:
The message
from Chris Bacon contains these words:

You can drill toughened glass, you just have to be careful
(and very slow), and use a fine abrasive and rod as ?? ago.

You sure about that? As I understand it, once the compressed outer layer
is broached the whole thing goes bang no matter what. Prince Rupert's
Drops and all that.

Theres a difference between toughened and windscreen type glass.
Windscreens are deliberately stressed so they will shatter. But
toughened glass is not necessarily so stressed. I dont know if
toughened can be drilled, but I have seen toughened glass chipped on
one corner and the rest of the sheet didnt crack or break.


NT