| Ever since it came out in the mid-nineties, the JLC razor saw is one of my favorite tools, in the top three of all my tools. I switch to a new blade roughly every year, and wondered what kind of wear actually occurs. I have a hand-held digital microscope, so I made the following photos of two blades, one fresh, one well used. The colors are a bit strange, but the details are pretty clear. It also partially answers the question how they are made: one option was chemical etching, but I don't think see signs of that.
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