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Super Elastic Bubble Plastic (date unknown, likely 1970s) (media.piefed.ca)
submitted 2 months ago by to c/vintageads@sh.itjust.works
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It made bubbles of, per wikipedia,

polyvinyl acetate dissolved in acetone, with ethyl acetate plastic fortifiers added. The acetone evaporated upon bubble inflation, leaving behind a solidified plastic film.

Which looked like,

Super Elastic Bubble Plastic

↓↓ VOLUME WARNING! LOUD DISTORTED AUDIO!! ↓↓

And here's a 1970's commercial. Especially headphone users, would recommend starting low and easing into it.

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[–] 1 point 2 months ago

That might have been the actual reason, not the given reason. Sometimes it's easier to go with the easier explanation then getting into the thousand why's game.

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