Most of the time spontaneous glass breakage is the result of improper annealing of the glass by the manufacturer or thermal shock of the glass during normal usage.
Breaking a sheet of tempered glass.
Tempered glass is heat treated and is much stronger than non tempered glass.
Spread a 10 foot length of industrial paper.
Always wear protective clothing when working with glass.
How to safely break a sheet of tempered glass step 1.
The glass breakage is shown full speed half speed.
Pull a glass out of the oven or dishwasher when it is hot and place ice water into the glass and it may break due to thermal shock.
Breaking tempered glass at work.
Any non tempered glass will normally break as a single crack or multiple cracks which develop or propagate from origin either spontaneously or gently.
Here we break a large sheet of tempered glass to see the amazingly fast crack propagation followed by the crashing down of the shattered glass.
These breaks tend to be linear and not circular.
Thick industrial paper is used to catch the broken tempered glass.
Tempered glass is used where there is a likelihood of human contact and as such is made to shatter into small pieces when broken.