Could you quote the email you got from CMC Magnetics?
Thanks. ;)

1 In email telling me that the CMC for Philips discs use AZO dye Dye System with lifespan of at least 30 years if well stored and used CMC Verbatim AZO dye Blue they also said that the polycarbonate used in all medias manufactured by CMC was being pure polycarbonate quality

2 a piece of plastic from my hard loosened broke away from the center of the disk still keeps the record being read by the drive, I need to worry about it?

3 to end, the polycarbonate was actually made ​​to protect data and disc scratches? polycarbonate is the protection I was looking for scratches?

I agree, post (quote) the email.
If the center hub broke, re-burn it. Problem solved. Common sense.
Polycarbonate is transparent for the bottom and more durable than generic "plastic". That's why it's used.

To close the matter

1 Polycarbonate was placed in the DVD + R by the engineers who invented the DVD to give protection against scratches?

2 The CMC said that in all her dvd discs are used pure polycarbonate, the difference for the pure recycled? influence on the durability of the disc?

That was not a primary concern, but secondary. Polycarbonate was durable and transparent. But yes, it can withstand some scratches. Some special discs have anti=scratch coating. Just handle and store the discs properly, and you'll be fine.

"Pure" means not impure. That likely means not recycled, but not necessarily. "Pure" mostly means transparent.

already understood that DVD + R has 2 layers of polycarbonate which protects the disc from scratches, which is the coating that you mentioned? Philips DVD + R CMC MAG M01 has this coating?

No.

You have to use FTI and TY discs. Links to that media was already given. Verbatim and TDK used to have some too, but no longer. These are harder to find, online only, and more expensive. You'll likely have to buy them online from the USA in bulk if you want them. Unfortunately, I'm not sure where you can get those discs in your country. They may not be available there.

The Philips DVD + R 16x CMC MAG M01 has only scratched polycarbonate for protection?

Questions on the CD: All CDs have in total how many layers? what are these layers?

CDs have some protection to scratches on the face up and face down?

- Philips: No.

- Construct of a CD:
|Lacquer
|Foil
|Dye
|Polycarbonate

- No upper protection aside from a weak lacquer.

1 What is the Lacquer? it gives some protection against even minimal scratch?

2 To close the topic CD and DVD which are the materials used to give protection to the data and the read disc in case of scratches on the top layer and the bottom layer of the CD and DVD?

How is the structure and how many layers have a Bluray disc? are distributed as layers?

searched in google and not found

Attachment 3498
http://panasonic.net/blu-ray/technology/story02/

Hmmm....

I've seen images that show the bottom ploycarbonate as being much thinner on BD-R. I wonder if that's probably to scale. Because it doesn't look to be. BD-R is essentially an inverted CD-R, but with a thin polycarb layer on bottom. Consequently, that's why DVD is the most archival of the optical media -- it's 50/50, with the dye/foil in the middle.

1 Because this site http://www.tecmundo.com.br/dvd/8778-...-blu-rays-.htm layers are different Bluray the layers mentioned above?

2 is true that Bluray is less resistant to scratches on both sides of the disc in comparison with the DVD?

lordsmurf please answer my questions of topical fungus disc

1. I don't see any pictures on that site. Just text.

2. Mostly true, yes. Blu-ray has more issues with scratches, because the data grooves are narrower. BD-R supposedly has an anti-scratch coating to fight this, but having burned many BD-R thus far, I don't see any difference between it and DVD-R or DVD+R. They scratch the same. And because of the data, it's much worse for BD-R to be scratched. (BD-ROM, however, does seem to have better coatings on the bottom. But this conversations is about burning media, not pressing it.)

I'm tired of the fungus topic. It's just not going to happen. Your concern is misplaced. You should be more worried about how wallets will screw up discs, for example. That's common, while fungus has the same odds as the lottery.

1 I can see the photos on the site and the site says a bluray has 7 layers in sequence from top to bottom: policabonato layer, reflective layer, protective layer, dye recording layer, protective layer, cover layer and hard layer of coating, is it all right?

2 polycarbonate you said that gives protection to the scratch disk is present in Bluray?

3 lordsmurf please answer my questions on the topic of fungus to end once the subject because I'm explaining almost everything

You never posted to full email from CMC. :unsure:

1. Specific Blu-ray layers depends on the kind of media. Polycarb on top bottom, a foil, and the dye + spacers if BD-R.
2. I already answered this is great detail.
3. No more fungus questions. We're done with that. Move on if you have other questions.

1 I'm not getting to understand how many layers have a bluray disc and how they are organized, you do not see it on google several different estrturas

* 2 you can not answer the questions in my last topic of fungi to clarify my doubts these forever?

please help lordsmurf

Was read on the structure and fabrication of a Bluray disc and read it so that only has a polycarbonate layer on the top side of the disc, but in the underside of the disc underneath the layer has some protection to prevent scratches and damage data reading the disc? I'm talking about any bluray disc from any manufacturer