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I am not seeing the link in between...but nice picture!!

PVD (Physical Vapor Deposition) is applied much like AR is on a crystal. It is a "mist" in a vacuum chamber and it embeds itself into the metals it is applied to. It's a pretty slick operation if you can see it done. Basically, put parts in a chamber, seal it, and let the process happen. I love the technology.

DLC (Diamond Like Carbon) coatings are a little different. While applied in a vacuum also, it takes on a different property: as the name suggests, a property that is as hard (and some say harder) than natural diamonds.

There are 2 types of diamonds: on a molecular level one type looks like a lattice fence, while the other looks like a beehive "honeycomb" arrangement.

When DLC is applied to metal, it actually takes on BOTH molecular shapes, making it very difficult to scratch with anything but itself or other diamonds.

DLC is what you will find in 99% of rep (and gen for that matter) timepieces. It's easy, relatively cheap, and the results are an excellently strong resistance to scratching.

Now, it's not like superman's cape: if you smash something against it the metal below it will still deform. But as far as scratches go, it's incredible.

To illustrate I will scratch the DLC coated divers extension of my Jacques Piccard DSSD with metal, and photograph it.

Be right back lol......

I want to see the photo. LOL so basically DLC is tougher and better right?

Very impressive. Needs knowledge refreshing every once in a while. Thanks Pete

I say not only sunglasses. There better be replica handbag forum or something so that I can refer my wife to go there and buy only from there lol

Who knows, maybe just lighting lol I have never seen a white gen physically. But the back of it look reeeaaally nice!