Scotch Audio Cassette history.

3M Company (NYSE: MMM), formerly known as the Minnesota Mining and Manufacturing Company, is an American multinational conglomerate corporation based in Maplewood, Minnesota, a suburb of St. Paul.

The Scotch brand and Scotch Tape are registered trademarks of 3M. The company also used the name "Scotch" for its audiovisual magnetic tape products. In 1996 3M exited the magnetic tape business, selling its assets to Quantegy (which is a spin-off of Ampex). The familiar plaid design, a take on the Wallace tartan, was introduced in 1945 and is used on all early Scotch models.

Scotch invented Cobalt doping techinque in 1971 producing "High Energy" tape which later was adopted by many companies. They have also contributed to SONY Ferrichrome tape invention. In 1979 they have introduced the first Metal particle tape.

Sadly, at the end Scotch stopped producing its own tape outsourcing it from other companies like BASF and DENON.

Some of the interesting ads of Scotch cassettes:

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