Why does the computer crack when it is opened for 3 mm?

Actually, this is a quality problem. Such as stones, bubbles and dopants, which are easy to crack if they are not completely integrated in the glass making process; If the glass also contains nickel sulfide crystals, these substances will explode easily when heated.

It broke down before installation.

Some glasses may be damaged unexpectedly during transportation, such as falling edges and corners. Like tempered glass, there can be no similar situation, because the damage in these places will destroy the internal stress of the whole glass. If you don't pay attention to the installation, with the passage of time, the life of the glass will be greatly reduced, leading to glass breakage.

3, the glass temperature is too high

When the glass absorbs the infrared radiation in the sunlight, its temperature will rise, and a step will be formed between the edge and the cold end, which will lead to the decrease of the boundary temperature. The greater the temperature difference formed on the wall, the greater the risk of thermal cracking.