How do you know if glass is tempered?
 

I've got 4 or 5 glass doors(i think they're off things like china cabinets,ets,found when I was cleaning out my garage)1/4 inch 4'x2' pieces.Doesn't have any stamp/markings,so how can you tell?

Jim

If you have a pair of polarized glasses put them on and look at the glass. If you see waves in the glass then it IS Tempered. No waves, No tempered.

cheers

the only glasses I have are for my laser level,they're deep red to protect against the laser.I guess I'll just try cutting a broken piece.

Jim

If you have a broken piece of it, my guess is it's not tempered ... shouldn't it have shattered instead of broken?

If there is a broken piece it can't be tempered, because when temp glass breaks the entire piece shatters into 1000's of small pieces. And the same happens when you try to cut it. I had a large piece of temp glass from an
old sliding glass door, seemed a waste to toss it so I tryed to cut it, one thing good is it went into the garbage pail a little easier after I swept up
all the pieces.

As soon as i find my glass cutter,i'll start cutting.Are there any tricks to make the cutting go smoother?If it all goes to @#$! then no worries because the glass was all free :biggrin: