The Reason For the Heat - #5776
Monday, March 2, 2009
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Our friend Barbara is incredibly creative - including creating jewelry. The other day she told us about how she made a beautiful gold ring. Actually the ring is designed in wax. When she has the ring design that she wants carved in the wax, she pours plaster-of-Paris around that molded wax ring. Then she puts it in an oven. Well, of course, the intense heat melts the wax away until there's no wax left, just a vacuum, shaped like the ring she wants. Then she puts this in a centrifuge, and that spins gold into the vacuum where the wax used to be. Gold rushes in where it was once just wax. And out comes something very beautiful and much more valuable.