Human hair chips away at a razor’s edge, engineers say – Brinkwire

A shaving razor that doesn’t blunt could be on the horizon after scientists discover human hair can ‘chip’ metal blades, despite being 50 times softer than steel.
In shaving experiments, engineers closely studied shaving in ultra-fine detail with an electron microscope to see how a razor blade can be damaged as it cuts human hair.
Despite hair’s relative softness in comparison to the strength of steel, the edge of the blade dulls quickly after a few short shaves. 
Defects in the steel’s micro…

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