[Jewelry making - Article 01249] - [Orchid] Tumbling to work harden

[Lisa Orlando]

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    Brian Adam recently noted that tumbling only work hardens the
    surface  of metal. I have searched the archives (as best I can) and
    I see no  information on exactly how much of the surface is
    hardened. If, for  example, it's hardened to a depth of .5 mm, then
    1 mm wire should be  thoroughly work hardened--right? I'm also
    concerned about how much a  piece is compromised by merely having
    the surface hardened. If this  is going to be your only method of
    work hardening, are there certain  tolerances you need to observe
    (e.g. don't use thicker than 24 g  sheet)? What are the potential
    consequences of not staying within  these tolerances, particularly
    when working with fine silver? 

    Thanks in advance for all your patient and brilliant responses! 

Lisa Orlando
Aphrodite's Ornaments

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