1, anti-scratch: use razor blade, scissors, keys and other hard sharp items in the above scraping, if it is easy to make the surface appear scratch, such a film is certainly not clearance.The toughened glass film that reaches 9H hardness really is very difficult to make clear scratch above.

2, fragile: poor tempered glass film in the lamination, (especially novice) hole position is not correct, resulting in repeated tear.Force control is not good enough will be broken scrap, because the glass substrate quality is not good enough.

3, anti-fingerprint: dripping and writing!The surface of toughened glass film with good anti-fingerprint property is all water, drop a few drops of water on it, the water will not spread out, shaking, like mercury rolling on the ground, without any trace.Another way is to write on it with a pencil.Very good anti - fingerprint sex, is very difficult to write things on it, even if there is a little trace, is a casual wipe completely without any trace.If the anti - fingerprint is very poor, everything can leave a trace on it, the oil pen written on it, it is difficult to erase.

4, explosion-proof: this is very important, not only related to the phone protective film can protect the phone, but also related to their own safety.Glass chips are known to cut easily.A piece of high grade toughened glass stick film, after be broken, won't appear any clastic, can have the grain that rupture only.

5, fit: a good tempered glass film, tear off the protection, directly in accordance with the order, put on the mobile phone gently press a point, you can completely adhere to it, no bubbles, etc..And stick very tight very tight, if quality is poor, can appear stick not firm, shatter, have bubble to wait for a lot of problems.

6, feel: good tempered glass laminate, after grinding arc edge feel smooth and delicate.Poor membrane is made very rough not smooth, sticky or blocked.