Tip for checking for tempered glass
Hello all:
Reading the attached response I recalled a nice tip that I used when
drilling my own glass aquarium.
You can easily identify whether a piece of glass has been tempered or not by
using 2 polar lenses. I used a camera polar lens and a polarized lens from
a pair of cheap sunglasses.
Place a lens on each side of the glass and rotate one while looking through
it. If the glass is tempered you will notice a distinctive pattern that
shows as you rotate the lens that was formed when the glass was tempered. If
it isn't tempered, it will just look clear. Try it out on
an automobile window that is marked as safety glass to see what the pattern
is like that you are looking for. Works like a charm. On my 90 all glass,
none of the panels were tempered, I had the bottom drilled by a glass
company for $10 / Hole.
The glass company was even unaware of this little trick.
Just thought I'd share.
Have a good day!
Bill
<Thank you for this. Will post for all's edification. Bob Fenner>
Found this on line
Good luck
Manny