_hot_ - Medal Crack

Human bite force averages around 171 pounds per square inch (PSI). While most solid metals can handle this, medal manufacturers have three enemies:

The phenomenon, nicknamed “medal crack” in conservation circles, wasn’t limited to 1912. Further study revealed that many medals from 1908 to 1948—especially those made from recycled silver after the World Wars—suffered the same fate. The impurities were a ghost of industrial haste. The cracks were not decay, but a memory of imperfection frozen into metal a century ago. medal crack

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Never glue a valuable antique medal. Glue residues turn yellow and acidic, worsening the crack over time. Human bite force averages around 171 pounds per