Anybody know how thick straight razor edges are, as well as commercial DE and cartridge edges? I found a patent that discussed 200-300A thicknesses before PTFE deposition, 3000-4000A after chrome and PTFE deposition, and ~500A after the initial shave had stripped off excess PTFE. However, I don't know if that's typical or outstanding for commercial blades, much less how it compares to a well-sharpened straight.