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The researchers used
microscopes to find out how hair damages a razor blade. They got a close-up
of what happens during a
when the blade cuts a hair. The blade gets damaged in a
of ways. One way is that a single hair creates a tiny
on the edge of a blade. This chip becomes bigger as it cuts more hair. After more shaving, the blade loses its
to cut cleanly and becomes blunt. A researcher said: "We are
and want to...make better metals. In this
, it was intriguing that if you cut something very soft, like human hair, with something very hard, like steel, the hard
would fail." He said his team is "aiming to solve an important
problem".
