What Will Happen When Tempered Glass Self-Explodes, Trigger Factors Summary

Tempered glass is widely used in kitchen cookware, and the tempered glass lid is one of the most frequently contacted items in daily cooking. Many users have encountered the sudden shattering of a glass lid without obvious external impact, which is the typical self-explosion of tempered glass. When a tempered glass lid self-explodes, it breaks into numerous small, blunt-edged particles instantly, which greatly reduces the risk of deep cuts, but it may still cause scalding accidents if hot food or liquid splashes out during cooking.

There are several common trigger factors for the self-explosion of a tempered glass lid. The first is internal nickel sulfide impurities inside the glass lid. These tiny impurities expand and contract inconsistently with the glass body during temperature changes, gradually destroying the internal stress balance of the tempered glass lid and eventually leading to spontaneous breakage. The second is drastic temperature shock. Pouring cold water on a hot glass lid right after steaming, or placing a chilled glass lid directly into boiling water, will exceed the thermal stress tolerance of the tempered glass lid and trigger self-explosion.

The third is edge damage. The edge of a glass lid is the weakest stress position. Daily collisions with hard objects may leave invisible micro-cracks on the tempered glass lid, which expand slowly during subsequent use and finally cause shattering. For a stainless steel wrapped glass lid, rusted or deformed metal edges that squeeze the glass edge can also induce self-explosion of the glass lid. Choosing a high-quality tempered glass lid, avoiding sudden temperature changes, and handling the glass lid gently can effectively reduce the risk of self-explosion.