What property remains unchanged for tempered glass compared to annealed glass?

The property that remains unchanged for tempered glass compared to annealed glass is impact resistance. Both types of glass are designed to have specific clarity and characteristics; however, the main distinction between tempered and annealed glass lies in their response to stress and impact.

Tempered glass undergoes a special heat treatment process that increases its strength and durability, enhancing its ability to withstand greater forces or impacts without breaking compared to annealed glass. While both types can exhibit similar properties regarding thickness, color, and transparency, tempered glass is specifically noted for its higher impact resistance due to the stress that is introduced and then relieved during production.

Thus, impact resistance remains a consistent point of comparison, as tempered glass is known for being significantly more resilient to impact shocks than its annealed counterpart.