How can you identify if a type of glass is tempered?

Identifying tempered glass often involves looking for a special marking, typically located at the corner of the glass piece. This marking indicates that the glass has undergone the tempering process, which involves heating and rapidly cooling the glass to increase its strength and safety. The presence of this designation is critical because tempered glass is treated to withstand impacts better than regular glass and shatters into small, blunt pieces, reducing the risk of injury.

While other options might suggest features related to glass, they do not provide the reliable identification method that the special marking does. For instance, thickness and weight can vary widely among different types of glass, brands may not always be visible or present on every piece, and tint alone does not indicate whether glass is tempered. Hence, looking for the specific marking is the most effective way to ascertain if a glass type is tempered.