[Jewelry making - Article 00143] - Re: [Orchid] Broken drill bits remover

[Judy Willingham]

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Hello Peter,

>     Another traditional agent to remove broken drill bits is Alum.
>     Works best when boiling. You can get it in the grocery store in the
>     pickling spices section. 

    Please help me understand. I was drilling out a sterling bead and
    broke off the bit (of course!!). I put the bead in an alum solution -
    that was a year ago. The water has evaporated and the alum has formed
    nice crystals, but the bit is untouched. What is wrong?? 

    The only thing I can think of is that the bit (I think it's carbide)
    is resistant to chemicals. 

Suggestions?
Judy in Kansas
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