Misconception about Gorilla Glass - Galaxy S II General

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).
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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.
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I hope that clears up.
Sources:
Source 1 - Corning's own documentation. Look at "Abrasion Resistance" section.
Source 2 - Post from Erica Griffin

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

Prashanthme said:
Is this Only for Galxy s2 or for all phones which has Gorilla Glass?? Post this in Android general forum
Click to expand...
Click to collapse
It's not just for phones. It's for everything that has Gorilla Glass.

Looking forward to diamond screens!

Gorilla glass has a good resistance when you try to break it or the phone falls down, but it isn't indestructible.

Thread cleaned. Lets not Troll, derail or flame

[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
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

Thanks for information, perfect to know what to expect from some stuff, if it will scratch or not.

Please revise your article, see:
http://forum.xda-developers.com/showthread.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

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.

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 ?

Gorilla glass was intended to be put together with stuff like your keys, coins etc
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
Sent from my GT-N7005 using xda premium

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.

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.

That is why phones like s3 with gorilla glass still shatter when dropped.
Sent from my GT-N7005 using xda premium

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://forum.xda-developers.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

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://forum.xda-developers.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
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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

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)
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GT-i9100 ICS 4.0.3

its all about peace of mind baby....and with a good quality screen protector there is little difference really

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

Related

X10 comes with two protective films?

I unboxed my X10 today, and found that besides the relatively more obvious protective film I taken off once I opened the box, there is a EXTRA, very well positioned film on the top of the glass. If you look closely enough, you will see the edge of the extra film from the actual glass underneath. Does anyone else notice the same or is it just me? Is that really just one more layer of protective film or it is part of the material of the glass?
Yes, it comes with one pre-applied screen protector and one inside the box!
Out of interest what sized microSD card was included? Mine came with 16GB (Nordic version).
If I understood it right from the webpage I ordered mine from. does mine come with 8 GB
So how to take it off?
It's driving me insane....and why does a SCRATCH-RESSISTANT screen need a pre-applied screen protector???
So has anyone tried to remove the pre applied fim? I'm so against to use any kind of film on my touch screen device.
ivansee said:
So has anyone tried to remove the pre applied fim? I'm so against to use any kind of film on my touch screen device.
Click to expand...
Click to collapse
I hate it too...so i just removed it
before/after pics: (replace xx wiiht tt)
hxxp://i44.tinypic.com/5017xh.jpg
hxxp://i42.tinypic.com/14aip35.jpg
I actually got 2 ADDITIONAL screen protectors :-/ and mine came with 8gb card so ordering a 16gb one online
The "pre applied protector" is the one SE calls scratch resistant, I think. "Shutter proof sheet on mineral glass".
Take a look at the X10 white paper: developer.sonyericsson.com/getDocument.do?docId=102192
brodos123 said:
The "pre applied protector" is the one SE calls scratch resistant, I think. "Shutter proof sheet on mineral glass".
Take a look at the X10 white paper: developer.sonyericsson.com/getDocument.do?docId=102192
Click to expand...
Click to collapse
As far as i know mineral glass is in itself "scratch proof". But that doesn't mean it can't be scratched of course. It means minor pocket scratches are avoided.
"Mineral glass is ordinary tempered glass made from silica. It is more scratch resistant than Plexiglass which is a plastic also used for watch crystals."
So if infact it is mineral glass there is no need for an extra layer of protection.
I'm not quite sure what "shutter proof sheet" is but seems strange that this screen should need one when other mineral glass screens do not.
Also should point out that for me it seems identical to the included "screen protector" in both size, thickness and consistency.
I'll report back if scratches start appearing on my screen. I'll give it 7 days of normal use(as i used my iPhone, Hero, LG Arena) to see if any scratches start appearing, but I doubt they will.
I didn't receive my X10 yet, but isn't the 'protective' film used to make the screen more fingerprint resistive?
Vin87 said:
I didn't receive my X10 yet, but isn't the 'protective' film used to make the screen more fingerprint resistive?
Click to expand...
Click to collapse
No, infact there were more fingerprints with the film applied vs when i removed it. You need a special coating on the screen for that(oleophobic coating) and with that you can wipe the screen clean very easily.
As far as i know the X10 has not have it's screen treated with oleophobic coating.
Trekster said:
As far as i know mineral glass is in itself "scratch proof". But that doesn't mean it can't be scratched of course. It means minor pocket scratches are avoided.
"Mineral glass is ordinary tempered glass made from silica. It is more scratch resistant than Plexiglass which is a plastic also used for watch crystals."
So if infact it is mineral glass there is no need for an extra layer of protection.
I'm not quite sure what "shutter proof sheet" is but seems strange that this screen should need one when other mineral glass screens do not.
Also should point out that for me it seems identical to the included "screen protector" in both size, thickness and consistency.
I'll report back if scratches start appearing on my screen. I'll give it 7 days of normal use(as i used my iPhone, Hero, LG Arena) to see if any scratches start appearing, but I doubt they will.
Click to expand...
Click to collapse
According to the white pages:
"Scratch-resistant Yes. Shutter proof sheet on mineral glass"
The way I see it the "sheet" makes it scratch resistant.
If you ever had a watch (clock) with mineral glass, you know that it scratches easily. for a scratch resistant glass you need a saphire glass!
Both iphone and nexus one probarbly have mineral glass, but the thing making those so resistant (see youtube) is some kind of coating on the glass. (I think)
brodos123 said:
According to the white pages:
"Scratch-resistant Yes. Shutter proof sheet on mineral glass"
The way I see it the "sheet" makes it scratch resistant.
If you ever had a watch (clock) with mineral glass, you know that it scratches easily. for a scratch resistant glass you need a saphire glass!
Both iphone and nexus one probarbly have mineral glass, but the thing making those so resistant (see youtube) is some kind of coating on the glass. (I think)
Click to expand...
Click to collapse
There is nothing in the white papers suggesting that either the nexus one, iPhone nor my old Hero had any other coating than the oleophobic coating for easy fingerprint removal.
Here is a good explanation of mineral glass vs. sapphire glass:
http://www.answerbag.com/q_view/1870141
And yes Sapphire glass is the best but cost too much for ordinary phones. mineral glass will protect the phone against most pocket scratches. But the real test will be the next 7 days, today there is no apparent scratching of the phone(no micro-scratches either).
Also of note is that the screen seems much more responsive after the removal of their so called "shutter proof sheet".
What we really need is an reviewer that doesn't give a damn about his test-unit to give it a go...with and without the sheet!
Trekster said:
No, infact there were more fingerprints with the film applied vs when i removed it. You need a special coating on the screen for that(oleophobic coating) and with that you can wipe the screen clean very easily.
As far as i know the X10 has not have it's screen treated with oleophobic coating.
Click to expand...
Click to collapse
Thanks for the two nice photos, Trekster! Do you find touch sensitivity has improved after you removed the sheet? I've been using the X10 for 1.5 days so far, and I still feel like sensitivity is not as good as iPhone (even worse than Nexus One)
ivansee said:
Thanks for the two nice photos, Trekster! Do you find touch sensitivity has improved after you removed the sheet? I've been using the X10 for 1.5 days so far, and I still feel like sensitivity is not as good as iPhone (even worse than Nexus One)
Click to expand...
Click to collapse
Yes the sensitivity has been improved quite a bit. I would say it's on par with the other touchscreen phones now.
Trekster said:
So how to take it off?
It's driving me insane....and why does a SCRATCH-RESSISTANT screen need a pre-applied screen protector???
Click to expand...
Click to collapse
The watchword here is scratch-resistant.
A glass screen will always be more scratch resistant than a plastic screen, but that doesn't mean that it can't be scratched at all. The screen-protector is just a way of helping extend the life of the screen face and I personally thank SE for providing it. Take spectacles for example. Glass lenses are harder wearing, but cost more and weigh more. Plastic lenses are lighter and cost less, but are more prone to scratches. You can still scratch glass lenses by putting them down glass first.
The difference between mineral glass and sapphire glass is interesting. My watch has a sapphire glass face and it has *ONE* scratch after 3 years of being worn everyday. That scratch came from a HARD direct impact (which hurt my wrist). The face is otherwise flawless.
ZenithUK said:
The watchword here is scratch-resistant.
A glass screen will always be more scratch resistant than a plastic screen, but that doesn't mean that it can't be scratched at all. The screen-protector is just a way of helping extend the life of the screen face and I personally thank SE for providing it. Take spectacles for example. Glass lenses are harder wearing, but cost more and weigh more. Plastic lenses are lighter and cost less, but are more prone to scratches. You can still scratch glass lenses by putting them down glass first.
The difference between mineral glass and sapphire glass is interesting. My watch has a sapphire glass face and it has *ONE* scratch after 3 years of being worn everyday. That scratch came from a HARD direct impact (which hurt my wrist). The face is otherwise flawless.
Click to expand...
Click to collapse
Yes if you read my posts further along I do point out that the screen isn't scratch-proof
I do question the decision and still do as my HTC Hero(which I bought back in August 09) has ZERO scratches And they are both supposed to be based on the same mineral-glass technology.
Im testing
Well, I've removed the screen protector and I think it is much better.
It seems so much smoother, and the screen is definitely more responsive.
I will post again in a couple of weekend to keep you all up-to-date.
soo... u guys can confirm the touchscreen is way better without the foil on? ( more sensetive aaand more accurate???)
coz i am thinking of swappin mine 2 the Desire.. but cant test it takin of the protector.. otherwise they wont return it...
I have had my problems with the X10, but the screen and its sensitivity is not one of them.. Without the exception of the edges...
I can almost never type "a".
I added the second protection as well, and love how the screen works / flows...
(with the exception of the left edge )

Galaxy S has gorilla screen protector built in

http://www.youtube.com/watch?v=6xASJobjD68
EDIT: I stand corrected. It doesnt appear to be the "gorilla glass". Its more like a tempered glass. Sorry for the misleading title.
Video above:
Reviewer did multiple scratch tests on the phone:
1) sharp metal objects inside a ziplock bag
2) use of a sharp nail
3) sharp screw
Hardly any scratch on the screen itself. Only when a box cutter was introduced did it enable a scratch to appear.
Also did a drop test: 3 hip level drop and 1 head level drop. Only after the 4th drop did the screen crack. However, the phone still seemed to work.
I don't understand Korean, but the box cutters look like they scratched the screen.
Strange test that show galaxy not scratch proof.
You tube vdo does not show fine scratches all over the phone that normally bothers everyday users.
Sent from my GT-I9000 using XDA App
It says tempered glass on that korean page (google translator)
Where did you get this gorilla glass from?
caelestis2 said:
It says tempered glass on that korean page (google translator)
Where did you get this gorilla glass from?
Click to expand...
Click to collapse
Isn't gorilla glass just a marketing term for a plastic-glass composite made by corning. It's "gorilla" since it's more scratch resistant than polycarbonate just like any other glass-plastic composite/laminate would be. I'm sure the glass on the Galaxy S is virtually identical to that of the latest Iphone.
Gorilla Glass is a brand name I think?
Meza1 said:
Gorilla Glass is a brand name I think?
Click to expand...
Click to collapse
Corning’s Gorilla® Glass is an environmentally friendly alkali-aluminosilicate thin sheet glass designed specifically to function as a protective cover glass for high-end display
Click to expand...
Click to collapse
Corning is a brand, Gorilla Glass is a product name.
Gorilla Glass is a name for toughened alluminosillicate glass. It is specifically distributed by Corning and telling people that you got a Lamborghini when you really got a ferrari is lying, even though they are both good. Tempered glass != gorilla, and it isn't certain that the newest iPhone has gorilla. They just say so b/c it's scratch resistant.
well, i had the galaxy s in my trouser pocket for one day.
there where no other things (keys etc.) in the pocket, only the phone.
in the evening i noticed a scratch on the display (not large, but visible on a bright background).
thankfully i was able to replace the phone with a new one, now i carry it in a bag all the time and i put a screen protector on the display.
Rough pockets eh? Screens just don't scratch themselves. You did something.
caelestis2 said:
Rough pockets eh? Screens just don't scratch themselves. You did something.
Click to expand...
Click to collapse
yeah, for sure
all i know is, when i have a new device i handle them with uttermost care.
as there was no bag with the galaxy i had to carry it one day without using one.
but i guess you are right and i should have known, that the cotton that pocket trousers are made of is known for its screen cutting and scratching properties.
of course, it could have been my fingernails. who knows?

Screen Scratch Test

Hi guys!
For this test I used a set of keys and a cutter.
https://www.youtube.com/watch?v=fhoF564nJ_Q
I hope you will like it
Cool. Was this a test device or your own?
Sent from my Galaxy Nexus using Tapatalk 2
Awesome, thanks so much!
I posted one a bit ago but that was with some knives....the box cutter is impressive.
I am more worried about the small pieces of sand, I think that is what scratches the glass more......But, this video has me almost convinced that I do not need a screen protector.
a test device
"Cool. Was this a test device or your own?"
Wow, this just proves that all the other people complaining about scratches just don't take care of their phones.
Super high, unrealistic drop test now? ;D
Sent from my Galaxy Nexus using Tapatalk 2
theROMinator said:
Super high, unrealistic drop test now? ;D
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
soon
The screens smash pretty easily I think.....
I saw a video posted a week ago or so and waist high on the sidewalk smashed the screen.....
Confirmed my feelings about the screen. When i got the phone it just felt like it could withsand some abuse. Wouldnt go so far to try this myself.
[email protected] said:
The screens smash pretty easily I think.....
I saw a video posted a week ago or so and waist high on the sidewalk smashed the screen.....
Click to expand...
Click to collapse
Yes, the screen is more sensitive to strong falls than to scratches but as you can see it resisted the sharp cutter
It's advertised as scratch proof, not as shatter proof. Keep that in mind
Sent from my GT-I9300
member68 said:
It's advertised as scratch proof, not as shatter proof. Keep that in mind
Sent from my GT-I9300
Click to expand...
Click to collapse
It's not advertised as either. It's scratch resistant.
Sent from my GT-I9300 using XDA
It certainly is scratch proof but as my device shows that actually the glass is very brittle! My screen cracked in my pocket! without me doing anything!
Sent from my GT-I9300 using XDA
well a material can only be exceptionally flexible(ductile) or hard(strong), but never both. if you want a material to be more shatter resistant(ductile), then it'll be softer and less scratch resistant. Conversely a harder material will be more scratch resistant but more brittle and prone to shatter. its always a tradeoff between these two physical qualities.
strelk112 said:
It certainly is scratch proof but as my device shows that actually the glass is very brittle! My screen cracked in my pocket! without me doing anything!
Sent from my GT-I9300 using XDA
Click to expand...
Click to collapse
Your problem occurred from a defect in the glass manufacturing process. I don't think that is a standard.
Sent from my GT-I9300 using XDA
MiG123 said:
well a material can only be exceptionally flexible(ductile) or hard(strong), but never both. if you want a material to be more shatter resistant(ductile), then it'll be softer and less scratch resistant. Conversely a harder material will be more scratch resistant but more brittle and prone to shatter. its always a tradeoff between these two physical qualities.
Click to expand...
Click to collapse
Although this is true in some cases it is not in all. Thanks to chemist and material scientist, treating or chemically finishing materials could give the best of both worlds. Go watch the gorilla glass test on YouTube, it is more scratch resistant than its competitors and almost twice as flexible.
Gorilla Glass has a lot to do with its surface finish as well as the glass itself.
Sent from my GT-I9300 using XDA
SlimJ87D said:
Your problem occurred from a defect in the glass manufacturing process. I don't think that is a standard.
Sent from my GT-I9300 using XDA
Click to expand...
Click to collapse
That is exactly my theory but as far as Samsung or any one else is concerned it is accidental damage and no one is willing to believe me i didn't do it!
Sent from my GT-I9300 using XDA
Very Relevant
Jed Dignazio said:
Gorrilla or not, Its still glass!!!
Bottom line is anything harder than Gorilla glass which has a hardness between 8+9 will scratch the surface.
Iron, steel, nickel, lead, gold, silver or any medal are softer than gorilla glass, so they should not scratch the glass.
On the other hand, sand contains quartz and it could scratch gorilla glass, for example when sand is in your pockets (after a walk on the beach).
One more thing:
a common misconception is: 'make something sharp and it will scratch'. it's wrong. you can make your fingernail or your key as sharp as possible, it is still softer than the glass and it will not scratch.
So, no, keys wont scratch it (steel), but anything harder than 8 on the scale will with no problem. So anybody that has no scratches obviously hasnt made contact to the screen with anything harder than a 8 on this scale.
Hardness Substance or mineral
0.2–0.3 caesium, rubidium
0.5–0.6 lithium, sodium, potassium
1 talc
1.5 gallium, strontium, indium, tin, barium, thallium, lead, graphite
2 hexagonal boron nitride,[10] calcium, selenium, cadmium, sulfur, tellurium, bismuth
2.5 to 3 magnesium, gold, silver, aluminium, zinc, lanthanum, cerium, Jet_(lignite) (lignite)
3 calcite, copper, arsenic, antimony, thorium, dentin
4 fluorite, iron, nickel
4 to 4.5 platinum, steel
5 apatite, cobalt, zirconium, palladium, tooth enamel, obsidian (volcanic glass)
5.5 beryllium, molybdenum, hafnium
6 orthoclase, titanium, manganese, germanium, niobium, rhodium, uranium
6 to 7 glass, fused quartz, iron pyrite, silicon, ruthenium, iridium, tantalum, opal
7 quartz, vanadium, osmium, rhenium
7.5 to 8 hardened steel, tungsten, emerald, spinel
8 topaz, cubic zirconia
8.5 chrysoberyl, chromium, silicon nitride
9-9.5 corundum, silicon carbide (carborundum), tungsten carbide, titanium carbide, stishovite
9.5–10 rhenium diboride, tantalum carbide, titanium diboride, boron nitride, boron [11][12][13]
10 diamond
>10 nanocrystalline diamond (hyperdiamond, ultrahard fullerite)
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bortak said:
Very Relevant
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Not very relevant at all. ALthough what you say is true, it is not the hardness of Gorilla Glass that lets it perform the way it does, it's the way it is chemically treated that allows it to resist scratches.
You are just talking about a mechanical property but not taking in mind the material process. Yes those materials will eventually scratch the glass (common sense), but whatever the coating on the glass is has to wear off first.
Chemical treatments. There's definitely a lot more to it, I would have to read more extensive datasheets, but here are some.
http://www.corninggorillaglass.com/sites/all/files/GG2%20PI%20Sheet%20Rev%20b_050912.pdf
Corning® Gorilla® Glass 2 is an environmentally friendly alkalialuminosilicate thin sheet glass that is better able to survive the real world events that most commonly cause glass failure. Its superior
composition allows a deeper layer of chemical strengthening than is
possible with most other chemically strengthened glasses — making it
both durable and damage resistant.
bortak said:
Very Relevant
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gorilla glass is almost as hard as diamond
Sent from my iPhone using Tapatalk

Gorilla glass is marketing at its best

Hello. I have managed to scratch my precious S4 screen just after using the phone for a week. Yeah I do have a mild case of OCD (at least what I think is mild ) considering that I do use a pouch for it I wonder what is the point with all those videos showing off the impressive Gorilla glass x. Of course the second I noticed it I applied a screen protector. So much for Gorilla glass..
If you want a pouch....buy a kangaroo.
As everyone will tell you Gorilla is scratch RESISTANT NOT SCRATCH PROOF.
The ads that demo how tough Gorilla glass is show them using coins,keys and knives on the screen mainly. These are "softer" than the layer on the glass so it doesn't scratch.
Sand however is very "hard" so it can easily scratch Gorilla glass. If you got sand in the pouch and it rubbed on the screen it will definitely scratch it.
It's actually a very good product and is more resistant than other glass but it isn't indestructible and the manufacturers don't claim it to be.
Sand is a screens worst enemy.
P.S Why did you post this in Q+A?
Sent from my GT-I9505 using XDA Premium HD app
Had my S4 for over 6 months with just the case in the picture. I check my screen every now and then for scratches and marks. I literally can't see a THING on that screen and it's very impressive. I'm pretty careful with my phones but my last phone, HTC Mozart, had a much softer screen. Seriously, you might be used to it now but old displays were a LOT more sensitive than these new screens...
Dropped mine with no cover on concrete twice. Landed screen down both times, no scratches, no issues at all. What did you do to the screen? As said above it's scratch RESISTANT. Sand and other abrasive substances will scratch it. Sand has eroded land masses over time when you think about it.
I always have to ask this as there are a LOT of clones about, is your device a real s4?

"Both Gorilla Glass 3 AND Dragontrail X are used for Z3C's display"

I've received an answer from official Sony support staff over at the Sony Mobile support forums, on a thread regarding which type of glass is used for the Z3C. It turns out that for the display, both Gorilla Glass 3 AND Dragontrail X are used. Unfortunately, no info on the rear glass:
"For the display glass we use both Gorilla 3 and Dragontrail X but i'm afraid i don't have any detailed information about the rear glass."
http://talk.sonymobile.com/t5/Xperi...ss-is-on-Xperia-Z3-Compact/m-p/838927#U838927
Is that a "and" or an "or"?
So those who have Gorilla glass breaks easily but harder to scratch.
Those who have Dragontrail scratches easily and harder to break?
Which? I heard users saying it is easy to scratch and easy to break! Perhaps, they are talking about the Z1 or Z2.
LastQuark said:
Is that a "and" or an "or"?
So those who have Gorilla glass breaks easily but harder to scratch.
Those who have Dragontrail scratches easily and harder to break?
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That's what I'm curious about as well.
my guess that it may boil down to a matter of availability.
LastQuark said:
Is that a "and" or an "or"?
So those who have Gorilla glass breaks easily but harder to scratch.
Those who have Dragontrail scratches easily and harder to break?
Which? I heard users saying it is easy to scratch and easy to break! Perhaps, they are talking about the Z1 or Z2.
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If this is true I think I may have gotten the Dragontrail version because I have been pretty careful with the phone os far and already have a small scratch on the upper right. I think I would choose scratch protection over drop protection in the end because scratches are drive me ****ing nuts.
So if yours is a Dragontrail, use PET film. If Gorilla glass, use tempered glass. Problem solved!
Just need to know about the backside. To date, no one makes a tempered glass for the backside.
Why PET for Dragontrail?
For those with true balls, give us a scratch test, attempt to scratch your device and post it on you tube LOL
Just received mine. If you squeeze the phone in the middle with your thumb and index finger, there is some flex. Almost feels hallow.
LastQuark said:
So those who have Gorilla glass breaks easily but harder to scratch.
Those who have Dragontrail scratches easily and harder to break?
Which? I heard users saying it is easy to scratch and easy to break!
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Was that sarkasm or did you just make that up? Is there any valid source to back up this claim? Imo many people talking on the interwebs just have uneducated opinions.
/e: that sounded more aggressive than it was meant to, I didn't mean your opinion is uneducated =)
maven1975 said:
Just received mine. If you squeeze the phone in the middle with your thumb and index finger, there is some flex. Almost feels hallow.
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That's completely normal.
Agreed. I am going to have a Case anyway if I
get a Z3 C and would prefer Corning GG 3 or GG2 as a known performer versus Dragontrail
which has a cool name but what is it ?
Godzilla Glass and Dragontrail sound good but give me GG3. Corning Gorilla Glass.
And give me a gel case with outer shell and I will add glass screen protectors front and back.
The Manager at Sony Store Miami which does not have Z3 or Z3 C yet mentioned " Tempered Glass " for the back as what Sony calls it.
Thanks for posting your experiences .
They use Both but you won't know Which is on your phone, like the z1c had Both jdi display and another lowcost brand so by chance you could get a superbright display or a not-so-good one.
Or they use none of both and Sony support just has no clue whatsoever
After 5 days I have absolutely no microscratches. I still put it in my pocket with other things (not keys though). In addition GG 3 also gets scratched by harder materials like sand, glass, concrete. If you have sand in your pocket or mineral dust it will be scratched if it's not made of sapphire glass (which would be scratched by diamond)...
I've had my phone for 7 days now and I checked under the bright lights at work and I have a bunch of micro scratches on the back, very disappointing. My phone is carried in my pocket by itself, or set on my desk so I have no idea where such scratches could come from. It's only on the back though, the front looks fine, so maybe they're using some inferior glass for the rear.
I think gorilla glass 2/3 or dragon tail doesn't really make that much difference....
I read somewhere the key is the strength retention after the glass has been scratched. I think Gorilla 3 perform better to retain that strength. All of the glass has very similar spec.
http://www.evolutivelabs.com/blogs/news/11840361-gorilla-glass-2-vs-3
Don't know if this deserved a separate thread but will post here as well.
Today I woke up and realized that my screen is broken. One think line. My guess that is happened yesterday cause phone touch was acting up in the evening but it's hard to see without much light.
My phone is in case, has a stock screen protector and was never dropped or impacted.
My guess that this is low quality from zony's side. Reminds me the crack that reviewers had on their back plate in one of the first review videos.
How is the front glass oleophobic coating?
2dorr said:
How is the front glass oleophobic coating?
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It's a smudge magnet. But my finger glides very smoothly on it and it's easy to clean. Usually it "cleans itself" in my pocket so when I take it out after having a walked around for a while, the screen is usually relatively clean.

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