Used C60 & C90 cassette tapes for music all the time at home or in the car, although C90 stretched allot if used over and over, such as trying to pick out certain words and notes. Eventually moved to digital audio tapes (DAT) but the recorder and tapes cost an arm and a leg, then eventually CD’s.
hmm.... I never found that with C90 (used mostly quality brands such as Sony or TDK) although the one C120 cassette was a nightmare for jamming.
The actual manufacturing of tapes is quite incredible - I remember reading about it way before Google and the internet and seem to recall the tape is made by pouring a chemical into a bath containing another chemical, where the two met, the reaction produced a film that was the basis of the tape that was wound onto a drum. Then the magnetic coating was applied before the film on the drum was passed through sharp knives to make the final cassette tape.
MD was a decent replacement for tapes, CD quality but much smaller, but solid state memory devices killed it.
and there was this:
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