Corning says Gorilla Glass 5 about improving drop performance

Samsung Galaxy Note 7 Video: Corning doubts reliability of the Gorilla Glass 5 durability test

By: Tech Desk | Updated: August 24, 2016 10:54:37 am
Samsung Galaxy Note 7 with Gorilla Glass 5 durability test video shows it to be easily scratchable than Galaxy S7 edge (Source: JerryRigEverything/YouTube) Samsung Galaxy Note 7 with Gorilla Glass 5 durability test video shows it to be easily scratchable than Galaxy S7 edge (Source: JerryRigEverything/YouTube)

Samsung Galaxy Note 7 is one of the first devices to get Corning’s latest Gorilla Glass 5, which claims to be more shatterproof than its predecessor, but a durability test shows that extra capability has comes at the cost of scratch resistance.

A video by Zack from JerryAnything performing durability test on the Samsung Galaxy Note 7 shows the Gorilla Glass 5 on the device scratched with a metal pick at hardness scale of 3, which Zack notes as one step above plastic. Corning is pitching Gorilla Glass 5 as tougher than the Gorilla Glass 4, but it definitely looks less scratch resistant. Zack, who claims to have done similar tests on over 30 other device, notes that Galaxy S7 edge (with Gorilla Glass 4) showed scratches at hardness scale of 6 and more deeper marks at level 7.

Glasses generally fall under level 5 of hardness on Mohs scale and the ones with tempered glass are more scratch resistant. In the case of Galaxy Note 7, Zack claims the screen may be more durable against drops, but not against scratches. However, Corning, the company behind Gorilla Glass, has refuted the claims.

First, Corning doesn’t find the test carried out by Zack reliable and believes the whole test was carried out in an uncontrolled manner. Speaking to Android Authority, Corning has questioned the loads used by Zack while testing the hardness of Gorilla Glass 5 on Mohs scale.

Corning admits that glasses developed by the company fall between 5-6 on Mohs hardness scale and a Mohs pick of 3 cannot scratch the glass. Corning’s Jon Pasansky told Android Authority that “Often when you have a softer material like that, and depending on what kind of loads you have used, you tend to see material transfer on the test substrate.”

While the question here is of scratch resistance, Corning finds it more closer to a material transfer. He further adds the company has done similar tests under controlled environment and has observed material transfer phenomena. The worrying part here is the statement from Corning which confirms that the Gorilla Glass 5 was definitely designed to be more durable against drop tests, rather than against scratch tests.

Technically, the issue may not affect an average Note 7 user and the Gorilla Glass 5 with tempered glass will definitely be more scratch and drop-proof.

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