new tank

[hangles]

just picked up a 90 gal and dont know who made it. it has 7/16 glass (very heavy) and heavy plastic on top and bottom dark oak simulated. I need to drill for returns and am worried about it being safty glass. any ideas on finding out?

thanks

 

[fliynhi]

Usually it's only the bottom that is tempered glass. The front, back and sides should be ok for drilling.

 

[FishNFun]

If you have some polarized sunglasses you should be able to see a pattern on any glass that is tempered.

 

[jh2pizza]

2nd on the Polarized lens. I used a couple camera filters.

 

[sammie]

Just use a good pair of ppolarized sunglasses and get it out in the sunlight. Look at it at an angle and if its tempered you'll see a pattern that looks like a shadow. Try it by looking at your car side windows to see what the pattern looks like.

 

[hangles]

thanks ! will do

 

[Perched Urchin]

+1 again on the polarized lenses.
The pattern you see if the glass is heat treated (tempered) will look like large blurry polkadots or a blurry honeycomb. The pattern is created by the air jets used to rapidly cool the glass during the process and they are called quench marks.
Here is even more of a random trivia fact - there are people in the glass business that can tell you who made the glass and who made the machines on which it was made just by looking at those quench patterns.

Sorry - way more than what was required. Couldn't help myself.

 

[szwab]

Here is even more of a random trivia fact - there are people in the glass business that can tell you who made the glass and who made the machines on which it was made just by looking at those quench patterns.

Sorry - way more than what was required. Couldn't help myself.

:lol:

That's something I'll think about from here on out. Sort of like the last song you hear on the radio.