Postby admin » Mon Dec 31, 2007 4:34 pm
One very plausible reason is that the bridge piece is the spring that makes tongs work.
Cast silver has no spring, you bend it, it stays bent - bend it too much, it cracks. Wrought silver, when hammered but not annealed, acquires springiness due to compression on a molecular level.
If the solder joint, of cast to wrought sections, is distant enough from the curve of the bridge, the heat of soldering will not conduct far enough or at a high enough temperature to anneal the bridge and cause it to lose its spring.
Regards, Tom
ps. happy new year to everyone, thanks for coming
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