To make a proper tin foil hat, you must have proper tin foil

[jmowreader]

Fortunately, it's still available:

http://www.advent-rm.com/catalogue/lines.aspx?criteria=materialform&materialid=48&formid=4

[littlemissmartypants]

1. Bookmarked. nt

[Granny M]

2. I wonder how expensive

that 3 mm stuff is? Thicker the better, I figure.

[jmowreader]

7. "As fuck" is the term you're looking for

[green917]

3. it's important to know how to construct one also

http://zapatopi.net/afdb/

[F4lconF16]

5. Bookmarked.

Thanks

[jmowreader]

6. Isn't it supposed to look like this?

[green917]

13. thanks for the laugh

Brilliant!

[Solly Mack]

4. Ooooooo. Shiny foil!

[DetlefK]

8. I guess, they are used for sputter-deposition.

http://en.wikipedia.org/wiki/Sputter_deposition

If you only need a few monolayers of Sn-atoms on your sample, a foil of 0.5mm thickness will last months.

[DetlefK]

9. And here's a song by Weird Al Yankovich about tinfoil:

[TheCowsCameHome]

10. Helpful hint: Foil and wearer mustn't be wrapped too tightly, either.

[Mopar151]

11. That would be MuMetal foil!

I temped for these folks backalong, making dies, tooling, and machining components for various products: http://www.mushield.com/shielding.shtml Mu Metal is an 80/20 alloy of nickel and iron. When it is annealed in a hydrogen furnace, it's the bees knees for magnetic shielding. The metal is nasty to work with, as is anything with a lot of nickel in it - metal slivers in your fingertips are an everyday thing, and formability is somewhat limited. The 3-cornered hat would have to be made of 2-4 pieces, and welded together, then all the seams polished. Only the most well-heeled looney tunes could afford one - maybe $3000 / copy?
Alternately, a beekeepers hat of copper mesh - a "Faraday cage" - worked well for shielding RF radiation, when I worked for TAFA . A power supply the size of a Buick, driving a 4-turn coil around a quartz tube, can make temperatures like the surface of the sun. The faraday cage contains stray RF, so controls, etc keep working right. Applications are either esoteric or classified.... But the Faraday cage is pretty much doable in a home shop. Tacked, or stapled over a wood frame, with soldered connections between sections of screen to maintain electrical connection.
From what my buddies at the the electrical bench tell me, you need to ground the shield so that induced voltage can bleed off, making you well grounded You may well ask if being well grounded would preclude the need for exotic shielding for the cranium - for that, I have no answer.

[jmowreader]

14. Very possible...

IIRC the proper way to ground a teabagger is to drive a ground rod through each foot the day before the election, and the rods have to stay in there 48 hours to drain the charge completely.

I've used mu metal but didn't know what it was...thanks.

[Snarkoleptic]

12. The reason you will only find aluminum foil at most retail stores is the gubmint

brain wave scanners can read through aluminum but not tin, so the NSA has banned most over-the-counter sales of tin foil.
#foil%20hat