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.

https://www.dailymail.co.uk/sciencetech/article-8600793/Human-hair-chips-away-razors-edge-engineers-say.html?ns_mchannel=rss&ito=1490&ns_campaign=1490 ]قرااء المزيد ..... [/url]


Human hair chips away at a razor's edge< engineers say