General > General Technical Chat

Are all “tempered glass” screen protectors scam?

(1/2) > >>

Logan:
Hello.
As I know, real tempered glass would completely shattered if anywhere on the glass is damaged. But I see those screen protector films which claim to be “tempered glass” just crack partially when dropped. So they are all scams?
Thanks.

ChristofferB:
Well what do you define as a scam?

They do work as intended, and takes a lot of the impact, I've managed to shatter the protector completely with my phone screen intact.

Also, "real" tempered glass involves a tensioned layer in the middle of the glass, so I suspect there is a minimum thickness needed to properly temper glass.

it might just be slightly pre-stressed.

TMM:
They are most likely chemically strengthened glass - exactly the same as the OEM digitizer glass. It is stronger than untreated glass but still turns into shards instead of pebbles when it fails.

coppice:

--- Quote from: Logan on December 22, 2020, 02:39:33 pm ---Hello.
As I know, real tempered glass would completely shattered if anywhere on the glass is damaged. But I see those screen protector films which claim to be “tempered glass” just crack partially when dropped. So they are all scams?
Thanks.

--- End quote ---
Unsupported tempered glass, like that used for most of the windows in most cars, generally shatters into small pieces when broken. However, when you laminate 2 thin sheets of tempered glass with a layer of plastic, like most car windscreens, the glass splits and rarely shatters. Those screen protectors are like the latter. They have a very thin tempered glass sheet over a thin plastic sheet. The plastic sticks the sheet to the phone and provides some resilience, so a strike to the glass is buffered from the phone's own glass, and most times only the protector's glass breaks. Its quite remarkable how rarely the phone's own glass breaks with these protectors on. It usually takes a massive impact.

tom66:
I suspect they aren't really tempered glass as you've noticed they tend to chip and crack rather than catastrophically fail.  I've always interpreted them to be a sacrificial shield,  with the intention that they absorb damage to reduce the need to replace the whole screen.

I did have one smartphone that definitely had tempered glass, I had it in my pocket and bumped into the side of my car while unloading shopping and the entire screen shattered.  It was a budget Android phone that I'd purchased to replace my sadly deceased Moto G4 that was damaged by water.

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod