How to Temper Glass to Break Safely

So what if you wanted glass to break in a different way that would not be so dangerous? You might do or make it a little stronger at the same time. Tempered glass starts as a nielled glass and then after it's been annealed, you reheat it up again. It cools it down more quickly than in this annealing process. The outside is already starting to crystallize and the as the inside cools, stuff on the inside is cooling more slowly. And because that tension is happening uniformly from all around, it actually strengthens. But we know that it can still shatter very easily and it shatters in those large chunks and large shards that are very