[Jewelry making - Article 00303] - Re: expansion/shrinkage

[Jeffrey Everett]

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    Well, I did a lot of sand castings for signet rings which we hammered into
    shape and sold to crest engravers. My experience is that the ring casts
    much thicker, probably due to some sand burning. The gold also shrinks as
    usual. The rings used to come out pretty thick, a size 10 model would cast
    at about a size 6 or larger. Geeze, that was, well, probably about 22
    years ago, and they say the first thing to go is your memory... :) So the
    ring may have cast at a six or seven, but it cast really thick. After an
    hour or so of hammering to shape, then another hour or more of filing, we
    probably produced about the best signet styles in the world. The hammered
    gold engraved like butter, the engravers preferred our more expensive hand
    worked rings over the centrifugally cast patterns because of all the
    hammering I guess. The certainly don't make 'em like they used to, ya
    know?

Jeffrey Everett


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