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The best treatise I've read on modern blades:
Razor Blade Evolution - Gillette Adjustable Razors
Gillette Razor Blades in the Adjustable Era UPDATE Research on why razor blades dull from Massachusetts Institute of Technology Aug 6, 2020. Patents have been applied for which will allow for the manufacture of blades which provide more homogeneity by compressing the steel at the blade edge...
gilletteadjustable.com