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The Minting Process Revealed

Step 3: Upsetting

It's not the bad blanks but the good ones that are upset.  Why is that?  Because upsetting is the next step in the process.  A machine, called an upsetting mill, raises a rim around the edge of the blank.  If you run your fingers around a coin, you can feel this tiny raised edge!
blanks rolling through upsetting mill
Next, blanks roll through the upsetting mill.

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