Eli5: Why do shaving razor blades become dull?

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I saw a video once of how a razor blade starts getting dull after just one shave. It doesn’t seem like it should be the case if it’s literally just cutting hair.

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Anonymous 0 Comments

If you will dry off your blade after using it will last up to six times longer. I use blades from Dollar Shave Club the one with 5 or 6 blades. Before I would get 4 or 5 shaves before having to get a new new one. Now that I dry it off I get a 20 to thirty shaves out of one blade.

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