BG> It doesn't have to be an iron oxide to retain magnetism.. Most tapes
  > are acetate or polyester based with a magnetic coating applied to the
  > recording side made of iron oxide (why tape often has a reddish look to
  > it). Metal tapes don't have to have oxide to work.
But the fact that it says, "OXIDE FREE" on the packing implies advantage
or superiority over other tapes which aren't oxide free.   What are these
advantages?
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