Quote:
Originally Posted by BCotton
Would not such a foil itself get magnetized evenually and need to be replaced?
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It depends on the shielding material. I don't think the commercial shielding materials (like mumetal) have this problem. Google for "mu metal foil" or "mumetal" and you'll find plenty of information on the stuff.
If you just use a piece of soft iron, then you would probably magnetize it eventually.