Quote:
Originally Posted by electrictroy
It Type IV Metal tape also an oxide (rust)?
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No. Type IV Metal tape uses unoxidised metal particles that are treated to prevent oxidation.
FYI, the orignal magnetic tapes made by BASF were metal particle tapes, but they tended to oxidise. The switch to using ferric oxide for tapes in the early post-war years created a more consistent and reliable product.