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Blade Numbers?

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“I use double edge blades made by derby and gilette. They both have
markings, i.e. 1,2,3,4 and L,R on their sides. Does this mean you can reverse
the blade for a longer durability?”

In my experience flipping the blade around doesn’t have an effect on durability. I have no idea why the numbers are there.
Author

Mantic59 is co-founder of Sharpologist and has been advocating traditional wet shaving for over 20 years. He specializes in single-blade shaving, including safety razors, straight razors, and traditional lathering techniques, with a focus on real-world performance and how tools and technique interact. His work has been featured by The Wall Street Journal, The Washington Post, and Lifehacker.View Author posts

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1 thought on “Blade Numbers?”

  1. Killian

    Thought I had seen a post on one of the shave discussion boards about it being there for manufacturing purposes. Something about ensuring uniform quality of both of the blade surfaces.

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