Is there a way to tell if glass is tempered or not? I know tanks should be labled but how do you tell if it doesnt have a lable? Id rather not take a guess and risk breaking it if I drill it.
Tempered glass?
- Thread starter yayfish24
- Start date
The only way I know is if you look at the glass with polarized glasses on you will see rainbow colors if it IS tempered.
There was another similar thread posted here recently, so try using the search function
There was another similar thread posted here recently, so try using the search function
I did a little bit of searching but didnt find too much stuff. Im looking into finding a glass place to drill my tank so I can run a sump. I know that I can buy hang on the tank overflows but Ive heard you can have problems with them losing their ability to flow over.
The strain pattern resulting from tempering can be observed with polarized light or by using a pair of polarizing sun glasses.
That statement can be found here - http://en.wikipedia.org/wiki/Toughened_glass
VISUAL APPEARANCE
Tempered glass possesses the basic optical qualities of annealed glass. The induced stress condition sometimes produces a slight bow in tempered glass lights. Tempered glass that has been manufactured in a vertical tempering oven contains small surface depressions resembling dimples along one edge. These marks are caused by the pointed metal tongs which support the glass during its passage through the oven. Glass which is passed horizontally through an oven may contain a very slight surface wave caused by contact with the rollers. The waviness can sometimes be detected when viewing reflected images from a large distance. Finally, the air quench nozzles discharge air in a fixed, reciprocating or rotating motion. The area of air quench can be seen through polarized glass as arrays of irridescent spots or lines. Under some lighting conditions these patterns can be seen in ordinary light.
that can be found here - http://www.alumaxbath.com/tech/tgp.htm
A little google goes a long way
That statement can be found here - http://en.wikipedia.org/wiki/Toughened_glass
VISUAL APPEARANCE
Tempered glass possesses the basic optical qualities of annealed glass. The induced stress condition sometimes produces a slight bow in tempered glass lights. Tempered glass that has been manufactured in a vertical tempering oven contains small surface depressions resembling dimples along one edge. These marks are caused by the pointed metal tongs which support the glass during its passage through the oven. Glass which is passed horizontally through an oven may contain a very slight surface wave caused by contact with the rollers. The waviness can sometimes be detected when viewing reflected images from a large distance. Finally, the air quench nozzles discharge air in a fixed, reciprocating or rotating motion. The area of air quench can be seen through polarized glass as arrays of irridescent spots or lines. Under some lighting conditions these patterns can be seen in ordinary light.
that can be found here - http://www.alumaxbath.com/tech/tgp.htm
A little google goes a long way
drilling is just bad news if you ask me haha. i work in a window factory and work with glass, every toughned, or tempered peice has a stamp in the bottom left corner, im not saying all tempered glass will have that but when we order in tempered glass it has the stamp. If the peice if over 10mm thick it is also likely to be tempered.
Linoleum;3628215; said:
While I believe you 100% that every piece of glass from your supplier has this stamp on it... and every piece over 10 mm that your company orders is tempered... I don't think either of these points could be assumed to hold true across every aspect of the glass industry
If you know who manufactures your aquarium, check their website to see whether the panes are tempered.
Chances are mine is tempered. Ill just forget about the drilling and save my pennies for a pre-drilled. Bummer.
nc_nutcase;3628260; said:
true. in north america, most marineland and aqueon tanks have only the bottom glass tempered, and the 1/2" glass used on the sides is not..
their websites list which panels are tempered and which are not.
however, unless your tank is made by one of these two, it doesn't help much.