From:	Gurth <jweste%smtp@******.HZEELAND.NL>
Subject:	Re: aluminum & X-rays (SMTP Id#: 124) - Reply
Date:	Thu, 10 Mar 1994 10:14:22 +0100

The aluminum came in play with the can. But you're right, metal detectors
don't work with x-rays, as someone else already said (imagine, if you
work in a building that uses x-rays to detect metal, you'd die of cancer
after a few years or so...). They work using magnetic fields, so in order
to detect something, that something must be able to get magnetic.