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Floppy disk Welding Goggles Answered

The new MacGyver used floppy disks as welding eye protection. I recently found a floppy, and tore it apart. It seems to be a very dark filter, but does it filter UV?

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Downunder35m

5 months ago

If you want to burn out your exes quickly then you have the perfect googles.
Nice for a steampunk even but certainly totally useless for welding.
People use the material as a filter for visible light so unly UV will pass through.
And the main problem with welding is the UV from the arc....

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Yonatan24

5 months ago

Circular plates made of metal or plastic and coated with iron oxide. - Google

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Jack A Lopez

5 months ago

If you happen to have the inside of a floppy disk, a sheet of phosphorescent (glow in the dark, or GITD) material, and a source of UV light, you might try to reckon the transmissive quality of the floppy disk plastic, based on the intensity of the shadow it leaves on the sheet of GITD material. This setup would look similar to Step 7, of this 'ible,

https://www.instructables.com/id/Phosphorescent-No...

Also if you happen to have a spectrophotometer, or access to one,

https://en.wikipedia.org/wiki/Spectrophotometry

with a range that includes the UV light you're interested in, well, you know, measuring transmissiveness, transmitivity? Uh... I am not sure of the name of the property, but essentially it is the fraction of light energy, or power, transmitted through a sample.

It would just be a matter of using scissors to cut a piece of floppy disk the right size to fit in a cuvette, or in the hole where the cuvette goes. As an additional test, you could try measuring two pieces of floppy, and see if that gives you the square of the signal that just one piece did.

That's a funny word, "cuvette". I think Prince wrote a song about spectrophotometry, called "Little Red Cuvette," or maybe that song was about something else. ;-)