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Gorilla Glass

Discussion in 'iPad 3 Forum' started by dustrho, Apr 29, 2012.

  1. dustrho
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    dustrho iPF Novice

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    Does the iPad 3 have gorilla glass on it? I only ask because after using mine for one week I already have two faint scratches on mine.

    Sent from my iPad using iPF
  2. Krooked
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    Krooked iPF Novice

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    "The iPad 2 and previous iPad both utilize Corning Gorilla Glass. This type of glass is an alkali-aluminosilicate, being primarily silica and aluminum with an alkali metal, along with other unspecified components mixed in to tweak its properties. The biggest benefit of alluminosilicate glasses, aside from being relatively tough to start with, is the fact that the rate of ion exchange is fairly high even at temperatures low enough that the structure cannot react, meaning it can be processed quickly and create deep protective layers in the glass. The iPad 2 has a modest reduction in the thickness of the glass (about 23% thinner, for those interested) compared to the first iPad, and the question of increased fracture risk has been posed. Given the identical surface quality between the two generations, the reduction of thickness should create no palpable change in toughness for the typical user. That is to say, a drop that would shatter the screen on the original iPad would likely do the same for the new model. That being said, several other design changes appear to account for the change, and might yield better performance in this department."

    It is unlikely that the Ipad 3 uses anything but Gorilla Glass 2, but may use something even tougher (?).

    For an example of this glass' strength and scratch resistance:


    Forcibly rubbing Keys and a Screw on Gorilla glass



    Strength


    All glass will scratch or break, but Gorilla Glass should withstand years of moderate to heavy use by most users.
    Last edited by a moderator: Jun 23, 2014
  3. tritium
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    tritium iPF Novice

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    I personally don't see any value in the "gorilla" glass product. Other than not scratching - which is a basic fact of glass vs. plastic going back for decades for products like sunglasses, it collapses and shatters when an ipad is dropped - so what is the advantage here?

    Apple could have used some low-end glass and it wouldn't make a difference; if it cannot withstand the typical 2-foot drop - the way a blackberry can, for instance - why is it touted in any way (yes, I've dropped my blackberry onto concrete from about 3 feet and it did not shatter).

    And since it does break when dropped, why is it so ridiculously expensive (like $300 or so) when replacing your screen?

    It seems you get high cost, but no benefit to it.
  4. followthesapper
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    followthesapper iPad Enthusiast

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    There is an oleophobic coating on the screen to repel fingerprints. It is likely this is what is scratched and not the glass itself.


  5. Seadog
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    Seadog Super Moderator Staff Member

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    The reason for the high replacement cost is that there are three components glued to the glass to my knowledge. The design of gorilla glass goes back over a half century, but did not have any applications until the costs were reduced and touch screens came into being. Glass can be made with a lot of different characteristics, but each has its limitations. For example, toughened (or commonly known as tempered) glass has a lot of virtues, but cannot be cut after tempering. Gorilla Glass is a modification of tempered glass as I understand it.

    In the most popular techniques, the capacitive or resistive approach, there are typically four layers:
    1. Top polyester coated with a transparent metallic conductive coating on the bottom
    2. Adhesive spacer
    3. Glass layer coated with a transparent metallic conductive coating on the top
    4. Adhesive layer on the backside of the glass for mounting.
    With the iPad, this is mounted to the digitizer.

    Screen breakage depends a lot on how it lands. I dropped my original iPad from 3 ft a long time ago. After my heart attack, I inspected it and found no damage, other than a corner chipped out of my Coveroo back cover. A different angle, a different floor material, a different possible outcome.
    Last edited: Apr 30, 2012
  6. HKey_Current_User
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    HKey_Current_User iPF Novice

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    How true! My wife dropped hers on a tile floor, from about 3.5 feet. It landed face-down, and shattered. I thought she was going to cry!
  7. zphone
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    zphone iPad Enthusiast

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    I've dropped my iPhone without a case so Many times on tile floor that I am truly shocked that it has not shattered or scratched so far. However I have heard of people just having one wrong hit and it's done.

    No doubt iPad with it's much larger screen will not be as tough. I've heard shattered screens on iPads are about 9% of users over the lifetime of the device. Forget scratches, if you hit it hard enough to scratch glass chances are that it's going to shatter not scratch.

    That's why I bought the AppleCare+. with these devices a good warranty is a necessity.
  8. AQ_OC
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    AQ_OC Super Moderator Staff Member

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    I agree. Way too fragile to not get AppleCare+. I don't want to be worried about the device all the time.
  9. Lunar
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    Lunar Guest

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    I agree... I too am inclined to suspect it would not take much to scratch the coating, I actually managed to remove my coatng entirely on my old iPad 1, at least I think I did as it was harder to clean the finger marks off, due to stupidly using a commercial lcd cleaning liquid... supposedly safe on LCD screens, AIS I'm not certain, but strongly suspect thats what happened over time. So I advise users never to use any cleaning liquid at all.. even those that claim to be 100% safe.

    The glass on the iPad 1 was quite tough, and much thicker.. hence the weight, our iPad 1 once fell from a height of around 5ft, Silly wife had it in a shopping bag which she hung on the coat hook in a ladies toilet and it survived without a single mark even though it dropped onto a solid tiled floor, though it did have a full hefty folio case on it, and of course it was also protected somewhat by the shopping bag. I suspect the iPad 2 with it's thinner glass would not take much of a drop at all, and the iPad 3 even less. You only have to look at the design of the later case edges to realise that glass has to be very thin indeed. Personally I've always prefered the square edges of the iPad 1, they could have still made it much thinner, but retain the practical square edges, the 30way connector and headphone jack plugs would have certainly fitted better.

    When you consider the cost of the iPad 3 I think most people will be treating them with care, and yet I know 3 people, besides several on here who have managed to get scratches on the screen... and because my iPad will be doing an aweful lot of travelling away from home over the next 2 months I've relented and fitted a decent protector, whether it stays on permanently is another matter, though to be fair.. I cannot even tell it has one fitted.
    Last edited by a moderator: May 1, 2012
  10. dustrho
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    dustrho iPF Novice

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    What really bothers me is that I've been extra careful with my iPad 3, I have a smart cover on it, always make sure there's nothing on the screen before using it (ie dust), and in less than one week I have two faint scratches on my screen. I'm definitely contemplating buying the Zagg shield for the screen, but haven't pulled the trigger on it yet.

    Sent from my iPad 3 (WiFi only, 16 GB) using iPF
  11. AQ_OC
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    AQ_OC Super Moderator Staff Member

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    Really? Which one are you using? My main reason for not using one is I don't want to degrade the visuals of the screen and I assume even the best ones would, to some degree.
  12. AQ_OC
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    AQ_OC Super Moderator Staff Member

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    Wow....do you wear a ring or a metal watch?
  13. Lunar
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    The brand is Technet, from Amazon £5.99 inc delivery so dirt cheap especially as you get 6 in a pack, though any protector obviously has to have some detremental effect, these are the best I've found so far... the antiglare matt type are a waste of money, and forget about those 100% bubble free antiglare ones.. they make the screen look really bad. I spent £30 on one of those.. These type I'm using are of the generic crystal clear variety, with no visible glue showing at all...though there is obviously some present to hold it in place, but the protector sheet does come off quite easy when your'e ready to replace it or to just remove. I just put a piece of sellotape on one corner and it will pull away from the screen dead easy. Never use your finger nail to lift it... much safer to lift it using a bit of adhesive tape.

    The biggest problem is the old dreaded bubble and dust issue when putting them on... when my pack of 6 arrived, I wasn't feeing too confident having ruined several in the past... so TBH I was fully expecting to ruin all 6 of them trying....lol
    There's nothing worse than seeing bubbles , but I managed to strike it lucky first time, only precautions I took was to fit it in the bathroom having run the hot shower for a few minutes to dampen down any dust that may be in the air. It's quite glossy, so if you can get it on without any bubbles at all, you really have to look very close indeed to tell there's a protector fitted, and unlike the others I've tried any degradation of the screen sharpness is very minimal... certainly not enought for me to notice.. and I'm pretty fussy.

    I should add.. that I've fitted quite a few protectors to mainly the wifes and grand-childrens gadgets in the past, and this is the very first time I've managed to do it with no bubbles... infact I was starting to think it was impossible to do without getting any bubbles, whether I have similar success next time is very doubtful...but now I know it is possible.. it gives me a little more hope. The secret is getting it on first time, as IME once you start lifting it up again perhaps to reposition or to clear a spec of dust.. then one always seems to make matters worse. I also found that taping 2 several inch lengths of sellotape (folded over) to the 2 corners of the sheet of plastic you pull away when you apply it is also beneficial as it helps to keeps your left hand as much as possible outside the screen area. So in effect.. you just pull back about 0.5" just to get it aligned around the Home button and square down the edges, so your right hand is always over the top... smoothing it down as you work along, while at the same time the left hand is slowing pulling back the protection cover (number 1) sheet using the 2 tapes you previously taped to the number 1 sheets. Using the 2 pulling tapes will help to avoid depositing/generating any specs of dust which cause most of the bubbles
    Last edited by a moderator: May 1, 2012
  14. dustrho
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    dustrho iPF Novice

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    No jewelry at all. I'm clueless and confused at how the scratches happened. It's very disappointing to say the least.

    Sent from my iPad 3 (WiFi only, 16 GB) using iPF
  15. AQ_OC
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    AQ_OC Super Moderator Staff Member

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    Please forgive the question....but based on your response I have to ask.....are you sure you are seeing scratches? Could there not be some particle matter stuck on your screen? Did you try a dab of wet to loosen it?
  16. AQ_OC
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    AQ_OC Super Moderator Staff Member

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    Lunar, your description of putting the protector on kinda stresses me out. Maybe that is why I don't want to use one.
  17. Lunar
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    LOL.. well you can't say I don't give a full descriptive reply.. and I agree with you to some extent.. it really is an art putting them on successfully.
  18. wvkawboy
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    wvkawboy iPF Novice

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    That's exactly why I didn't attempt doing this myself as a 1st time Apple buyer, I went from the Apple store directly to a kiosk that sold the protective sheets & the guy "applied" it like he was tinting windows... cleaned it, sprayed it & squeegied the moisture out.
  19. pianoman
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    Though not as susceptible to scratching as plastic - the iPhone/iPad glass is still very, very prone to it. I've had some change in my pocket scratch it - too long a fingernail on my typing hand - even particulates in a piece of paper towel leaves minuscule scratches. Those of you who are so confident - just tip your screen at the right angle in the light where the surface can be seen and I'll bet you have WAY more scratches than you think. I've had reps at Best Buy tell me the main reason for not giving top value on trade in is scratches on glass and other etchings in the surface of front or back.

    So a super thin cover is the call for at least iPhones. I agree - iPads tend to get a little more protected - but as I said earlier - I still feel like I need to cover their fronts.

    Each to his own.
  20. zphone
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    zphone iPad Enthusiast

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    I would be willing to bet that some of you that think you have scratches on your screen just have not wiped hard enough. I get marks that appear as scratches but they are not. The phone is so old now I don't care much anymore, but I've looked and looked and there are no scratches on the screen. After I wipe it down, it's a perfect as new piece of glass. Now before you ask, I have really good eyesight, and screens are important to me. There is definitely a coating that will get worn off - but it really has not been a concern - as I just wipe the phone screen on my pants and it's good to go. Definitely avoid wiping down with chemicals.

    It's just easier than getting stressed out about bubbles from a piece of plastic on a screen - plastic that will be way easier to scratch from fingernails and such - and then you have to live with looking at the scratched up plastic until you can get it replaced for another $15-30. To me that seems like a waste of money, which over the life of the device will end up costing you more than any trade in value you can get back out of it in the very unlikely case that a piece of plastic will protect your screen from something that should not happen anyways.

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