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Misconception about Gorilla Glass

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adotkdotjh
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(Last edited by adotkdotjh; 5th November 2012 at 05:09 AM.) Reason: re-wording
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Lightbulb Misconception about Gorilla Glass

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.

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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

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Prashanthme
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Quote:
Originally Posted by adotkdotjh View Post
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


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adotkdotjh
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Quote:
Originally Posted by Prashanthme View Post
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.

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666fff
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Looking forward to diamond screens!
 
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Gorilla glass has a good resistance when you try to break it or the phone falls down, but it isn't indestructible.
 
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siedus
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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
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Thanks for information, perfect to know what to expect from some stuff, if it will scratch or not.
 
FrankStealth
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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.


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jaykresge
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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.

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