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How to Make a Ferrofluid?

  1. Nov 21, 2009 #1
    I have a box of iron fillings. Can I make a ferrofluid with this and if so what other things do I need?
  2. jcsd
  3. Nov 21, 2009 #2
  4. Nov 22, 2009 #3
    would olive oil work? What kind of binder do i need?
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