Blu-Ray disc uses organic or inorganic material?

[gamemaniaco]

Blu-Ray disc uses organic dye to store the data it uses or other type of inorganic material? Blu-ray is equal to dvdr disc? Blu-ray has protection for scratches?

[lordsmurf]

Both. Depends on type/brand.
Scratch resistant, yes, but it's misleading. Blu-ray has major problems from scartches, and it does get through cheap surfaces.
It's worse that DVD for longevity. BD-R has more space, but at a price.
BD-R is like an inverted CD-R structurally. And that's not really good.

[gamemaniaco]

I wanted a scratch-resistant bluray disc and inorganic dye into the disc does not suffer from moisture and heat

in Brazil I just found bluray brands: Multilaser, Philips, Nipponic, Emtec, Maxprint, some of these brands and good and reliable?

[lordsmurf]

Funny enough, Blu-ray isn't as picky as DVD was.
Most of those discs are no-name/fake/off-brand crap, but PHILIPS media tends to be quite decent. Get those.

[gamemaniaco]

if I buy the philips bluray he will have inorganic dye and resistance to scratches?

[lordsmurf]

I don't remember if it's inorganic off-hand. You'll need to refer to the Philips documentation, wherever that is (their site?)

All BD-R has scratch resistant coatings. But again, some of them suck, and are not much different from not existing. Authentic Philips coatings are average. Nothing special, but not bad. It's a decent disc.

[gamemaniaco]

Lordsmurf thank you for your help

1 Who makes Blu-Ray Philips? Blu-Ray Philips has resistant coatings risks in the top layer and down layer?

2 What are the types of dyes used to store the data on Blu-Ray discs?

3 Blu-Ray has fewer layers than a DVD + R?

[lordsmurf]

Philips makes Philips.
Coatings are only on the read surface, not the top.
No idea off-hand about dyes. I'd have to refer to my research (sorry, not doing that now).
BD-R can have one or two layers like DVD-R/DVD+R.

[gamemaniaco]

1 CMC Magnetics does not manufacture Blu-ray for Philips? I have many DVD + R Philips manufactured by CMC

2 Bluray Disc has a polycarbonate protection layer scratches on top and down?

3 kpmedia quoted imorganico dye bluray disc:

Quote:

There's been several questions lately regarding the non-obvious differences of Blu-ray vs DVD media, as well as LTH BD-R vs HTL BD-R. While this will be more eloquently put into a future media guide, I'm going to quickly discuss it now.

Write-once recordable DVD-R/DVD+R media (as well as CD-R media) all uses synthetic organic based dyes -- usually azoic dyes (metallized azo chelates or azo metal chelate). Some of them are based on other synthetic organics, such as cyanine, dipyrrometheme or oxonol. CD-R also uses phthalocyanine or formazon. Information on the raw materials can be found on wikipedia, but for in-depth optical application, you'll want to pour over patent applications and brush up on your knowledge of chemistry.

[lordsmurf]

Philips makes Philips.
Read what I said. No coating on top. All discs use polycarb (plastic).

[dpalomaki]

Inorganic, supposedly very long life Blu-Ray media? The M-DISC might fill the bill if one is to believe their literature. But I've seen little independent information on it.

Only a small number of burners support M-DISC, and blanks are not cheap or widely available.
The packaging (plastic) may well about the same as regular BD media in terms of resistance to scratches.

[gamemaniaco]

1 Blu-ray discs use organic reflective layer that oxidizes on contact with oxygen?

2 how do I choose a Blu-ray disc for long-term archiving?

[dpalomaki]

http://www.mdisc.com/

However, I have no personal experience with them.

Everything erodes, oxidizes, decays, etc. The only question is how long it takes.

[lordsmurf]

All media oxidizes if exposed.

Blu-ray is really not an archival format. It's too fragile, like CD-R. The physical construction is the problem.
Fine for movies, but not data.

[gamemaniaco]

What is the best option for long-term archiving?

[lordsmurf]

DVD-R, DVD+R, RAIDed/mirrored hard drive. Use multiples for important content.
Secondary locations.

[gamemaniaco]

DVD-R and DVD + R has organic dye and organic reflective layer, if they degrade my disc is dead

Because the DVD is stronger than Blu-Ray?