Nina Kalinina on Nostr: Oh hey, DuPont found out that pure chromium dioxide can be used for tapes! I wonder ...

Oh hey, DuPont found out that pure chromium dioxide can be used for tapes! I wonder how many years until the discovery of modern-ish Barium Ferrite coating...

I still won't want to make one at home.

(Computerworld 1967-1-2)