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What is tempered glass for the smartphone screen
9H protective glass is glass (not plastic), which absorbs 100% of the impact force and shatters into small pieces (breaks like a spider web), thus protecting the most expensive part of your phone - the screen! This is the only accessory on the market that protects your phone 100% from frontal impact.
For example, silicone protectors or cases, which are 2-3 mm thick, absorb 5% of the force of the impact, and for this reason tempered glass remains the best protection for the mobile.
It only protects against frontal impact and result in cracking quickly.
Tempered glass gets its name from the process by which it is made - the annealing process. The glass is heated above the "incandescence point" of 600 degrees and then cooled at a very slow and controlled rate.
