Quenching cools the outer surfaces of the glass much more quickly than the center. As the center of the glass cools, it tries to pull back from the outer surfaces. As a result, the center remains in tension, and the outer surfaces go into compression, which gives tempered glass its strength.
How is hardened glass made?
How is Toughened Glass Made? Most toughened glass or safety glass is made by tempering, a process in which ordinary glass is heated up to a temperature of around 620°C for some time followed by abrupt cooling using jets of cold air.
How do you harden glass at home?
Below are the five steps that glass manufacturers must take in order to temper glass correctly.
- Cut the glass into the desired shape first. ...
- Inspect the glass for imperfections. ...
- Wash the glass. ...
- Heat the glass in a tempering oven, either in a batch or a continuous feed. ...
- Quench the glass to cool it.
