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

Firstly hair is stronger than most people think, also razor are very thin and hard which makes them kinda brittle. That being said they can last for months if you clean them well, usually the dullness has more to do with hair and skin accumulation rather than the blade itself but it varies from person to person and the amount of hair

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