Age of masters


Seeing new releases using re-masters which to me means they use the original 40+ year old master and twiddle some knobs.

Do 40+ year old masters still have viable iron oxide?  Would high frequencies suffer? Or do I misunderstand re-mastering?
128x128ibmjunkman
Watch this discussion, those masters are timeless and if they are stored properly in the archives then no problem to use them even 50 years later.
Mercury is about to re-release its entire classical catalog.  Some of the masters are as much as 70 years old and still sound great.