[Jewelry making - Article 00409] - Re: [Orchid] Setting Burr Sizes

[Guy G]

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    I took a setting class at new approach school and blaine used nitric
    acid to slightly reduce the size of burs just for the scenario of
    uncommon stone sizes.. he also said it was helpful to resharpen worn
    burs by etching them with nitric acid. I have also heard of people
    using muratic (the stuff that eats mortar off of bricks) for the same
    purpose. has anyone heard the same thing or tried it.

guy g.
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