[Jewelry making - Article 00144] - Re: [Orchid] Best material to stamp against?

[Jeff Demand]

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    Depends on the back surface. Flat back and clamping hard to polished
    hard steel works well, clamp to avoid the work from 'bouncing up'
    leaving a negative impression on the back. For large inside ring
    stamps with a detailed outside I use a 158 bismuth alloy. Heat and
    imbed the shank, stamp and remove. Harder than lead with the same
    problems but it works well. Water based poster paint or white out
    does work well as a resist to the bismuth alloy sticking, but
    normally it just flakes off. 

    Use care, not an idiot proof technique. 

Jeff
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