How to produce the tempered glass screen protectors

Computer Numerical Control Engraving Machines used to shape the glass 

to the exact sizes as the phone screen.

washing the glass to remove any grains of glass deposited during

polishing,as well as any dirt that may interfere with the tempering process.

useing chemical process to strengthen the glass. A piece of glass is 

drowned into an oven containing a potassium salt (KCl) at ~752°F / 400°C

for 6-7 hours.

AB epoxy glue covers equally silicon layer, the glass, and a membrane, 

so in the future the tempered glass can be applied to the phone 

smoothly and without any bobbles


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