Misconception about Gorilla Glass

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adotkdotjh

Senior Member
Nov 7, 2010
161
77
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:
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Prashanthme

Prashanthme

Senior Member
Sep 21, 2011
1,657
445
ಬೆಂಗಳೂರು-Bengaluru
Samsung Galaxy S21 Ultra
adotkdotjh said:
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
Click to expand...
Click to collapse


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

crisGS2

Member
Feb 12, 2012
26
1
Torino
Gorilla glass has a good resistance when you try to break it or the phone falls down, but it isn't indestructible.
 
S

siedus

Senior Member
Nov 27, 2010
86
36
Samsung Galaxy S10
[B said:
Misconception 2: The oleophobic coating is what's causing the scratches, so use sand paper to grind the coating away!!!!!!!!!
Click to expand...
Click to collapse

:confused: 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
 
jaykresge

jaykresge

Senior Member
Nov 8, 2010
837
479
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.
 
P

Poroto

Senior Member
Dec 13, 2011
353
34
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.
Click to expand...
Click to collapse

So basically if i grab a steel knife and scratch my phone with all possible strenght on earth, my phone will not scratch ?
 
B

brandonjuraimi

Guest
Gorilla glass was intended to be put together with stuff like your keys, coins etc :confused:

Sent from my GT-N7005 using xda premium

---------- Post added at 07:47 AM ---------- Previous post was at 07:34 AM ----------

Anyway, despite having gorilla glass, i still use a screen protector. I dont want to get my screen dirty and oily :D

Sent from my GT-N7005 using xda premium
 
jaykresge

jaykresge

Senior Member
Nov 8, 2010
837
479
Poroto said:
So basically if i grab a steel knife and scratch my phone with all possible strenght on earth, my phone will not scratch ?
Click to expand...
Click to collapse

Force can lead to shattering, but you won't scratch it. Ask yourself this, how many scratches are on your car's windshield? How about the windows of your house? Take your car keys or even a steak knife and run the edge along your house or car windows. Any scratches?

Yes, if you take it and stab glass with all of your strength, you have the potential of shattering it. You can do the same by throwing a rock. But that's not the same as scratching.
 
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A

adotkdotjh

Senior Member
Nov 7, 2010
161
77
jaykresge said:
Force can lead to shattering, but you won't scratch it. Ask yourself this, how many scratches are on your car's windshield? How about the windows of your house? Take your car keys or even a steak knife and run the edge along your house or car windows. Any scratches?

Yes, if you take it and stab glass with all of your strength, you have the potential of shattering it. You can do the same by throwing a rock. But that's not the same as scratching.
Click to expand...
Click to collapse

Exactly. There is a difference between fracturing and scratching.
 
B

brandonjuraimi

Guest
That is why phones like s3 with gorilla glass still shatter when dropped.

Sent from my GT-N7005 using xda premium
 
F

FrankStealth

Senior Member
Jun 30, 2012
77
20
I posted this in the screen protector discussion thread, mentioned by the OP:

"One more thing and i'm done with this! I found out how it is now, according to:

[1] http://chemistry.about.com/od/howthingswork/f/What-Is-Gorilla-Glass.htm

[2] http://en.m.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

[3] http://en.m.wikipedia.org/wiki/Sand

Mohs scale:

[1]
Gorilla Glass - 9

[2]
Random metals - 0.2 to 8

Tungsten - 9 to? 9.5
Titanium - 9.5 to? 10
Diamond - 10

Quartz (SiO2) - 7

[3]
SAND (composition: mainly SiO2 + other rocks and minerals, location dependent) - 7 to 10!

CHEERS!

So in CONCLUSION: if you happen to rub sand, containing diamond (extreme case) on your phone, it will scratch.

I also found this: "Misconceptions about Gorilla Glass" on XDA http://xdaforums.com/showthread.php?t=1866049 He sais that gorilla glass is 7, but i found out it is 9 [1].

He talked about another aspect that he sais is on cornings own website, that what actually scratch on a gorilla glass is the oleophibic coating. Oleophobic coating? Maaan my phone always looks like a friteuse! Maybe screen protectors do better... Also maybe thats why some sources say its a 7.

My conclusion: i wouldnt use a screen protector to cover my good looking screen. Im always pretty careful with it, not dropping it on floor or concrete. I very rarely to never have dirt in my pockets. Keys, lighters and such, wont hurt it. So who cares about protectors? I dont."

================
GT-i9100 ICS 4.0.3
 
Last edited:
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B

brandonjuraimi

Guest
FrankStealth said:
I posted this in the screen protector discussion thread, mentioned by the OP:

"One more thing and i'm done with this! I found out how it is now, according to:

[1] http://chemistry.about.com/od/howthingswork/f/What-Is-Gorilla-Glass.htm

[2] http://en.m.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

[3] http://en.m.wikipedia.org/wiki/Sand

Mohs scale:

[1]
Gorilla Glass - 9

[2]
Random metals - 0.2 to 8

Tungsten - 9 to? 9.5
Titanium - 9.5 to? 10
Diamond - 10

Quartz (SiO2) - 7

[3]
SAND (composition: mainly SiO2 + other rocks and minerals, location dependent) - 7 to 10!

CHEERS!

So in CONCLUSION: if you happen to rub sand, containing diamond (extreme case) on your phone, it will scratch.

I also found this: "Misconceptions about Gorilla Glass" on XDA http://xdaforums.com/showthread.php?t=1866049 He sais that gorilla glass is 7, but i found out it is 9 [1].

He talked about another aspect that he sais is on cornings own website, that what actually scratch on a gorilla glass is the oleophibic coating. Oleophobic coating? Maaan my phone always looks like a friteuse! Maybe screen protectors do better... Also maybe thats why some sources say its a 7.

My conclusion: i wouldnt use a screen protector to cover my good looking screen. Im always pretty careful with it, not dropping it on floor or concrete. I very rarely to never have dirt in my pockets. Keys, lighters and such, wont hurt it. So who cares about protectors? I dont."

================
GT-i9100 ICS 4.0.3
Click to expand...
Click to collapse

I dont care if it is gorilla glass or not, I will just put a screen protector to protect the screen from dirt :thumbup:

Sent from my GT-N7005 using xda premium
 
F

FrankStealth

Senior Member
Jun 30, 2012
77
20
brandonjuraimi said:
I dont care if it is gorilla glass or not, I will just put a screen protector to protect the screen from dirt :thumbup:

Sent from my GT-N7005 using xda premium
Click to expand...
Click to collapse

I dont care if the air is breathable, i will use a gas mask. Thanks for usefull post in right thread. Lets all produce as much garbage as possible for no good reason! (Including protectors)

================
GT-i9100 ICS 4.0.3
 
Last edited:
L

Leviathan13

Member
Nov 7, 2012
25
17
its all about peace of mind baby....and with a good quality screen protector there is little difference really
 
F

FrankStealth

Senior Member
Jun 30, 2012
77
20
True, ignorance is bliss. Please post comments on screen protectors in the do we really need a screen protector thread mentionrd by the op.

And @ OP. Please throughly rethink your article...
Or at least mention that sand mainly contains quartz which is 7 (gorilla glass is 9 and cant logically be 7, because else we would use normal glass which is mainly quarz + additives and it's a bit under 7), and sand in general has 7 to 10 depending on composition.
================
GT-i9100 ICS 4.0.3
 
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  • 26
    A
    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. 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
    View
    2
    Prashanthme
    Prashanthme
    adotkdotjh said:
    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
    Click to expand...
    Click to collapse


    Is this Only for Galxy s2 or for all phones which has Gorilla Glass?? Post this in Android general forum
    View
    1
    jaykresge
    jaykresge
    Poroto said:
    So basically if i grab a steel knife and scratch my phone with all possible strenght on earth, my phone will not scratch ?
    Click to expand...
    Click to collapse

    Force can lead to shattering, but you won't scratch it. Ask yourself this, how many scratches are on your car's windshield? How about the windows of your house? Take your car keys or even a steak knife and run the edge along your house or car windows. Any scratches?

    Yes, if you take it and stab glass with all of your strength, you have the potential of shattering it. You can do the same by throwing a rock. But that's not the same as scratching.
    View
    1
    F
    FrankStealth
    I posted this in the screen protector discussion thread, mentioned by the OP:

    "One more thing and i'm done with this! I found out how it is now, according to:

    [1] http://chemistry.about.com/od/howthingswork/f/What-Is-Gorilla-Glass.htm

    [2] http://en.m.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

    [3] http://en.m.wikipedia.org/wiki/Sand

    Mohs scale:

    [1]
    Gorilla Glass - 9

    [2]
    Random metals - 0.2 to 8

    Tungsten - 9 to? 9.5
    Titanium - 9.5 to? 10
    Diamond - 10

    Quartz (SiO2) - 7

    [3]
    SAND (composition: mainly SiO2 + other rocks and minerals, location dependent) - 7 to 10!

    CHEERS!

    So in CONCLUSION: if you happen to rub sand, containing diamond (extreme case) on your phone, it will scratch.

    I also found this: "Misconceptions about Gorilla Glass" on XDA http://xdaforums.com/showthread.php?t=1866049 He sais that gorilla glass is 7, but i found out it is 9 [1].

    He talked about another aspect that he sais is on cornings own website, that what actually scratch on a gorilla glass is the oleophibic coating. Oleophobic coating? Maaan my phone always looks like a friteuse! Maybe screen protectors do better... Also maybe thats why some sources say its a 7.

    My conclusion: i wouldnt use a screen protector to cover my good looking screen. Im always pretty careful with it, not dropping it on floor or concrete. I very rarely to never have dirt in my pockets. Keys, lighters and such, wont hurt it. So who cares about protectors? I dont."

    ================
    GT-i9100 ICS 4.0.3
    View

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