Why your hair dulls the sharpest razor blades

Ever wonder how soft hair can dull a steel razor? So did scientists at MIT.

Piotr Wytrazek/Shutterstock
  • Steel is fifty times harder than hair, yet shaving razors dull in a hurry.
  • A new study finds much of this is caused by hair cracking razors at points of imperfection.
  • The findings may lead to new ways of making razors that last longer.
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