[Jewelry making - Article 01240] - [Orchid] Hardening bronze for tools

[Teri Jo]

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    Earlier on Orchid there was a recommendation for the book Silverwork
    and Jewellry, by H. Wilson as a source for patinas. It was a great
    recommendation, thanks! For anyone else interested, be sure to get a
    copy of the second edition. I originally had a copy of the first
    edition which does not include the info on Japanese alloys or
    patinas. 

    On page 368, in reference to bronze, it is mentioned that tin will
    sweat out to the surface, if the metal is overheated. The goal is to
    avoid this if trying to apply patinas as it makes the surface hard.
    This comment is then footnoted to describe that the Egyptians used
    this feature to harden edges on bronze tools. How hot does the bronze
    have to get to have this happen? Is the surface hardening sufficient
    for small stamps or punches? I don't have any bronze currently. Is it
    worth picking up some for tool making? 

Teri Jo
Chandler, AZ

 
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