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Light bulb filament – how tungsten filament is made


Bill takes apart an incandescent to show how the tungsten filament is made. He shows it in extreme close-up and also discusses the material processing needed to produce ductile tungsten.


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1 Comment

  1. I worked for Philips one summer, in one of their filament factories. Luckily I was just doing data entry (on an ancient AS400), as the manufacturing floor was incredibly hot. Always awesome to see 12″ thick tungsten rods get stretched out to be hair thin filaments.

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