How It's Made

4:00 AM to 4:30 AM

Tuesday 13 May

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Retractable Ballpoint Pens/Solar Salt/Tubas

Season 14 Episode 13 of 13

The manufacture of retractable ballpoint pens, solar salt and tubas

How It's Made airs on Quest at 4:00 AM, Tuesday 13 May. (Subtitles.)

Learn more about How It's Made and other education/science/factual topics on our factual page

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