Bluray protective layer thinner than DVD and CD?

[TheWalkingDead]

How true is this about the protective layer and the fabric type for storing in disc sleeves? Is this just an advertising gimmick?

[Anthony P]

it is not protective but cover layer.

All three formats have a depth of 1.2mm. On a CD the data layer is stuck to the label and so the light needs to travel ~1.2mm of plastic to get to it. With DVD the data is in the middle 0.6mm and why there was the possibility of flippers. with BD the data is at 0.1mm much closer to the surface.

as for easy to wear. that is just stupid.
1) It is light going through plastic so there is no "wear" that way.
2) BD (and UHD BD) has a hard coat that is part of the specs and that does not exist on CD/DVD that means the plastic is better protected from "wear" and scratches. It is not because of the depth of the data but because of the pit size (how much data within a given space) the same small scratch is more problematic for BD then it is for DVD and even less problematic for CD.

[meremortal]

The above post is much more informative than I could contribute. But I will say that blu is more much comfortable when it comes to cleaning them. You can generally buff them in any direction with a microfiber without having to worry about adding scratches. But for whatever reason, even with a clean microfiber and using straight line motions it can seem to introduce some scratches on cds and dvds. Luckily, cds and dvds appear to be much more resilient in nature with scratches and so it's probably more of an ocd thing.

[Deutschmann]

Originally Posted by meremortal

The above post is much more informative than I could contribute. But I will say that blu is more much comfortable when it comes to cleaning them. You can generally buff them in any direction with a microfiber without having to worry about adding scratches. But for whatever reason, even with a clean microfiber and using straight line motions it can seem to introduce some scratches on cds and dvds. Luckily, cds and dvds appear to be much more resilient in nature with scratches and so it's probably more of an ocd thing.

Another thing to add is that the hard coat on Blu-Rays makes them dust repellent, whereas DVDs attract dust like crazy. If you wipe off a DVD, the dust will come back seconds later, but if you wipe off a Blu-Ray, it keeps clean.

It was actually the protective coating on Blu-Rays which sold me on them. Even if the content wasn't HD, the protective coating alone would make Blus worth the upgrade from DVD. I was getting so tired of DVDs scratching and becoming unplayable, so Blu-Ray was a Godsend to me.

It was only later that I noticed that the protective coating seems to repel dust in some way, which makes it a double improvement on DVD.

[Member-496106]

looking back, I would have never put dvds or cds in those sleeves. however, I am comfortable with blu-rays being stored in them. In my experience they do not scratch the blu-ray because of the protective coating. Their advertising seems completely backwards.

[meremortal]

Think I've posted about it before, but it seems like manufacturing in regards to scratch-resistant coating was at a higher standard earlier on. I remember discs used to have a wavy look like they were caked with coating. It was probably a few years before I even noticed a scratch on a blu. Even when buying used in stores, I rarely checked compared to dvd and cd. Perhaps earlier adopters were also taking better care of them then. But these days it seems so much more common for blus to have scratches.