The production life of dies used to strike circulating United States
coins at the Denver and Philadelphia Mints has been tripled as the result
of research by Dr. Tony Ying, a materials engineer in the
manufacturing division at the U.S. Mint.
Ying's research "led to using a metal burnishing formulation
that provides lubrication, corrosion inhibition, and metal protectant
for the blank burnishing process."
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Ying's formula is used in the production of circulation-quality
Jefferson 5-cent coins, Roosevelt dimes, America the Beautiful quarter
dollars, and Presidential and Native American dollars, according to the U.S. Mint.
Ying was recognized in 2015 by the Society of Tribologists and Lubrication
Engineers, receiving the society's 2015 Captain Alfred E. Hunt Memorial Award for his research.
More details on Ying's contributions to U.S. coin production can be