[Jewelry making - Article 00610] - Re: [Orchid] Weird metal-related question

[John Burgess]

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>      I'm wondering whether you know of any way to definitively test
>     from the outside of the body, to see if an implant like this is
>     magnetic? 

    G'day Karen.   I have a simple suggestion to offer for non invasive
    fairly sensitive testing to discover whether magnetic material is
    present. Obtain a flat, light and  sensitive spring and fasten one
    end to a piece of rigid plastic, like lucite.  Or even wood.   Obtain
    one of the very small, powerful rare metal magnets and glue this to
    the spring about a centimetre from the end so that this portion can
    be used as a pointer.  Bring this very slowly to the item being
    tested - in this case. your husband's face - and watch the pointer
    for any movement, which will indicate a magnetic attraction.   A
    compass may also work, and perhaps be more sensitive.   There are
    electronic methods for magnetic detection, which will ignore non
    magnetic metals.  However, do not forget that some nickel and cobalt
    alloys are magnetic. These methods will also detect cheap plated iron
    "jewellery" 

    There are simple, cheap hand held devices which will detect the
    presence of even a pin hammered into  a piece of wood - I have one to
    avoid ruining my planes and saws when working with used timber, but
    these detect almost any metal, including bronze boat nails.   When I
    pass it across my knees it goes mad - they are mostly cobalt chrome! 

We wish your husband well.
--
Cheers for now,
John Burgess;   johnb AT ts.co.nz of Mapua, Nelson NZ

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