Post Reply

Misconception about Gorilla Glass

2nd September 2012, 06:05 AM   |  #1  
OP Member
Thanks Meter: 60
 
95 posts
Join Date:Joined: Nov 2010
More
It's up to you to decide whether you want a screen protector or not, but there were too many people with misconceptions over at the discussion thread. Please discuss Protector vs No protector over there.

Here are a couple of misconceptions about Gorilla Glass and it's scratch resistance (source links below).

------------------------------------------------------------

Misconception 1: Gorilla Glass does not scratch???!?!?!?!?!?

Absolutely FALSE. While it's true that Gorilla Glass is scratch resistant to many materials, some will scratch Gorilla Glass. Gorilla Glass is reported to have a hardness of 7 (some say it is as high as 9. I've reached out to Corning for their "official" value, since they only use Vickers to measure hardness) in the Mohs scale, so any material with higher hardness, such as sand, diamond, or other minerals , will scratch your screen.

So, if you drop your phone, and if it happens to land on a grain of sand, it will scratch your Gorilla Glass screen. Or, if a grain a sand goes into your pocket where you keep your phone, then the screen may be scratched.

To those who didn't learn hardness scale in elementary school: materials with lower hardness than 7, such as steel knife, coins, or car keys, will never be able to scratch Gorilla Glass no matter how POINTY and SHARP it is. You can shatter the glass using a steel knife with enough force, but you cannot scratch it.

----------------------------------------------------------------

Misconception 2: The oleophobic coating, not the glass itself, is what's causing the scratches, so use sand paper to grind the coating away!!!!!!!!!

DON'T!. According to Corning's own documents (link below), the anti-brasion/oleophobic coating on the Gorilla Glass actually provides better scratch resistance than "naked" glass surface.

Corning performed an experiment where half of the Gorilla glass was treated with the coating and the other half was naked Gorilla Glass, and they rubbed silicon carbide sand paper on it. You can see the resulting picture on the link below. To use their words, there was a "significant scratching on the non-coated region whereas few visible scratches existed on the coating".

If you already have scratches on your Gorilla Glass screen, then it would've been worse had the coating not been there.

-------------------------------------------------------------

I hope that clears up.

Sources:
Source 1 - Corning's own documentation. Look at "Abrasion Resistance" section.
Source 2 - Post from Erica Griffin
Last edited by adotkdotjh; 5th November 2012 at 05:09 AM. Reason: re-wording
The Following 26 Users Say Thank You to adotkdotjh For This Useful Post: [ View ]
2nd September 2012, 07:00 AM   |  #2  
Prashanthme's Avatar
Senior Member
Flag ಬೆಂಗಳೂರು-Bengaluru
Thanks Meter: 320
 
1,323 posts
Join Date:Joined: Sep 2011
More
Quote:
Originally Posted by adotkdotjh

It's up to you to decide whether you want a screen protector or not, but there were too many people with misconceptions over at the discussion thread.

Here are a couple of misconceptions about Gorilla Glass and it's scratch resistance (source links below).

------------------------------------------------------------

Misconception 1: Gorilla Glass does not scratch???!?!?!?!?!?

Absolutely FALSE. While it's true that Gorilla Glass is scratch resistant to many materials, some will scratch Gorilla Glass. Gorilla Glass has a hardness of 7 in the Mohs scale, so any material with higher hardness, such as sand or diamond , will scratch your screen.

So, if you drop your phone, and if it happens to land on a grain of sand, it will scratch your Gorilla Glass screen. Or, if a grain a sand goes into your pocket where you keep your phone, then the screen can be scratched.

To those who didn't learn hardness scale in elementary school, materials with lower hardness than 7, such as steel knife, coins, or car keys, will never be able to scratch Gorilla Glass no matter how POINTY and SHARP it is.

----------------------------------------------------------------

Misconception 2: The oleophobic coating is what's causing the scratches, so use sand paper to grind the coating away!!!!!!!!!

DON'T!. According to Corning's own documents (link below), the oleophobic coating on the Gorilla Glass actually provides better scratch resistance than "naked" glass surface.

Corning performed an experiment where half of the Gorilla glass was treated with the coating and the other half was naked Gorilla Glass, and they rubbed silicon carbide sand paper on it. You can see the resulting picture on the link below. To use their words, there was a "significant scratching on the non-coated region whereas few visible scratches existed on the coating".

If you already have scratches on your Gorilla Glass screen, then it would've been worse had the coating not been there.

-------------------------------------------------------------

I hope that clears up.

Sources:
Source 1 - Corning's own documentation. Look at "Abrasion Resistance" section.
Source 2 - Post from Erica Griffin


Is this Only for Galxy s2 or for all phones which has Gorilla Glass?? Post this in Android general forum
The Following 2 Users Say Thank You to Prashanthme For This Useful Post: [ View ]
2nd September 2012, 08:06 AM   |  #3  
OP Member
Thanks Meter: 60
 
95 posts
Join Date:Joined: Nov 2010
More
Quote:
Originally Posted by Prashanthme

Is this Only for Galxy s2 or for all phones which has Gorilla Glass?? Post this in Android general forum

It's not just for phones. It's for everything that has Gorilla Glass.
2nd September 2012, 11:08 AM   |  #4  
666fff's Avatar
Senior Member
Thanks Meter: 164
 
372 posts
Join Date:Joined: Nov 2009
More
Looking forward to diamond screens!
2nd September 2012, 12:37 PM   |  #5  
Junior Member
Flag Torino
Thanks Meter: 1
 
26 posts
Join Date:Joined: Feb 2012
Gorilla glass has a good resistance when you try to break it or the phone falls down, but it isn't indestructible.
3rd September 2012, 03:39 AM   |  #6  
prbassplayer's Avatar
Recognized Developer / Retired Forum Moderator
Thanks Meter: 11,803
 
9,550 posts
Join Date:Joined: Mar 2011
Donate to Me
More
Thread cleaned. Lets not Troll, derail or flame
7th September 2012, 03:37 AM   |  #7  
Member
Thanks Meter: 35
 
83 posts
Join Date:Joined: Nov 2010
More
Quote:
Originally Posted by
[B

Misconception 2: The oleophobic coating is what's causing the scratches, so use sand paper to grind the coating away!!!!!!!!!

Anyone who did use sand paper on his/her SCREEN should consider not buying a phone at all....

Thanks for the 'crystal' explanation though
:thumbup:


Sent from my GT-9100
7th September 2012, 08:23 AM   |  #8  
Junior Member
Flag Beograd
Thanks Meter: 9
 
24 posts
Join Date:Joined: Aug 2011
More
Thanks for information, perfect to know what to expect from some stuff, if it will scratch or not.
3rd November 2012, 06:11 PM   |  #9  
Member
Thanks Meter: 19
 
77 posts
Join Date:Joined: Jun 2012
Please revise your article, see:
http://forum.xda-developers.com/show....php?t=1051373 Gorilla glass has not a hardness of 7! Quarz has a a hardness of 7! Gorilla Glass is 9 according to about.com.


================
GT-i9100 ICS 4.0.3
Last edited by FrankStealth; 4th November 2012 at 07:55 AM.
3rd November 2012, 06:30 PM   |  #10  
jaykresge's Avatar
Senior Member
Thanks Meter: 408
 
684 posts
Join Date:Joined: Nov 2010
Gorilla glass was originally developed to be shatter resistant. It's debatable if it offers more scratch resistance than regular glass, and it may actually be slightly less scratch resistant than regular glass. In most case (not all) higher shatter resistance = less scratch resistance (IE, plastic). I've been telling people for awhile that if you have a glass screen, a good screen protector is a good way to get peace of mind.

Post Reply Subscribe to Thread
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Top Threads in Galaxy S II General by ThreadRank