A spring-loaded center punch is designed to work on which type of glass?

A spring-loaded center punch is specifically designed to work on tempered glass. This type of glass is treated to withstand high levels of stress and impact, making it much stronger than standard glass. However, when broken, tempered glass shatters into small, blunt pieces rather than sharp shards, which generally reduces the risk of injury.

The use of a spring-loaded center punch allows for precision in making a small indentation on the surface of the tempered glass, which can create an effective starting point for making a controlled break when necessary, such as in emergency situations where access is needed. The punch applies a concentrated force that can penetrate the surface tension of the tempered glass, allowing for a safer method of breaking it in a rescue scenario.

Other types of glass, such as annealed or laminated glass, may not necessitate the same approach. Annealed glass is more prone to breaking easily, while laminated glass consists of two layers bonded with an interlayer, which makes it more resilient to impacts. These differences in composition and construction determine how each glass type reacts to impacts and thus the techniques used for accessing through them.