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

When I used the main brands they would dull very fast. No doubt in my mind they are designed that way. I switched to dorco who manufactures for many big brands and those things lasted forever. I originally got a razor and 5 or so blades. That was something like 6 years ago. I just had to replace it last week only because the razor broke. I hope the quality is the same.

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