When I erase a disc I normally expect the data track to change back to how it was when I bought it, why doesn't it, and is there a way to make it

I don't understand the question. Erasing a rewritable disc either erases the addresses (partial erasure) or the entire disc (full erasure). Erasing is done by using the write laser to heat the entire disc so that the semi-metal alloy recrystallizes to its original shiny state. (Writing melts the alloy which, after quenching, moves to a non-reflective state.)

The problem with in-drive erasure is that the disc relies on the laser pattern and spot size to change all the written information on the disc while a factory-fresh rewritable disc uses a low-power heating laser with a very wide pattern to cover the entire disc during its initialization. The only way to return the disc to its "pristine" state is by initializing it with a factory heating drive, and even then the alloy chemistry might not be exactly identical because write/erase cycles are generally limited to about 1,000 times before errors and jitter become too high.

If i am understanding this correctly you need a full erase for this to happen.

If you use quick erase then it only erases TOC (Table Of Contents).

Yes, I am aware but what I am trying to do is restore it back to a pristine condition I.E when it was brand new. is there anyway to do that

Yes; but as I mentioned originally, you need an initializer. That's extremely expensive.

Look what I did, I found the RitekW01 discs do indeed go back to a pristine condition when erased

Use DVDInfoPro and you have that option to make the RW look like it were never used before..........

Performing a Full Erase will not return rewriteable media to a pristine condition (as if never used), but it will erase all content on the disc and make it ready to be used again. Several programs can perform a Full Erase, including ImgBurn and DVDInfoPro.

Some NuTech drives can perform a more thorough blanking, but it's still impossible to return the media to the state before the first write, since the phase-change material degrades when used. I don't remember which program(s) can perform this blanking on NuTech drives, since I've never owned one.

Ok, ok, I sould have been more specific.

http://www.dvd-recordable.org/PrintArticle1548.phtml

and

http://www.freepatentsonline.com/4847558.html

Thanks, _chef_. I was thinking of DC Erase but couldn't remember the name of the technology.

OK, maybe I should be more clear, what I was trying to do was trying to make it look like the disc has never been used before when it has indeed been used before, and yes, I know the phase change layer will break down like this, but apparently the discs I have been using can do it.

I'll test more, and post back

disk will never look again the same way as before the first write.