[Jewelry making - Article 00199] - Re: [Orchid] Nitric acid to remove broken drillbit?

[James Binnion]

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    No need for nitric acid though it will work it will also attack the
    bronze, just plain old sparex pickle, or alum or citric acid
    solutions will all dissolve the drill bit. It will dissolve faster
    if warm and even faster if the piece and solution are placed in a
    plastic or glass container and placed in ultrasonic cleaner. 

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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