The Focus forum is now closed.
We're sad to make this announcement because, over the years, the forum has provided fascinating debate on science and technology, and we’ve often printed the discussions in the magazine.
We’d like to thank everyone who’s joined in and made it such interesting reading for fellow forum members and all of us who work on the magazine.
Graham Southorn, BBC Focus magazine
The Beige Avenger wrote:Shock.
To be specific
Fact is the toughening process put the glass under considerable internal tension and whilst some examples can remain stable for many years any imperfections that become compromised through surface damage, even tiny scratches, as a result of a change of temperature or even vibration/sound then it can lead to a catastrophic failure.
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