Published blade sharpness measurements leave something to be desired. I couldn't find anything on a bunch of current blades, so I decided I want to be able to measure sharpness myself. An edge on up industrial tester with BESS certified test media takes more commitment than I have to this, so I bought some 6lb test fishing line and a shahe force gauge and made myself a fixture with a piece of scrap wood and some m6 hardware from true value for about $40 total.
I cut up a few fathoms of line on it today. It is pretty consistent so far. I might make an aluminum fixture when I find the chuck for my drill press.
I figured I would start with a new Astra SP green India blade as a baseline, and measure it after each shave until it gets dull. I figure 7 measurements on each side is good enough with how consistent this seems. I am not sure what the best single number Stat is, mean, median, mean of middle 5 from each edge... so I will just collect data for a bit and see what seems to make sense. I don't think these measurements are interchangeable with BESS measurements, but the 30 grams or so on the Astra does seem to be in the same ballpark of what I would expect on BESS, based on the published data I have seem.
I guess this is going to take a long time to collect data because because I have to grow more hair every time I take a measurement.
I cut up a few fathoms of line on it today. It is pretty consistent so far. I might make an aluminum fixture when I find the chuck for my drill press.
I figured I would start with a new Astra SP green India blade as a baseline, and measure it after each shave until it gets dull. I figure 7 measurements on each side is good enough with how consistent this seems. I am not sure what the best single number Stat is, mean, median, mean of middle 5 from each edge... so I will just collect data for a bit and see what seems to make sense. I don't think these measurements are interchangeable with BESS measurements, but the 30 grams or so on the Astra does seem to be in the same ballpark of what I would expect on BESS, based on the published data I have seem.
I guess this is going to take a long time to collect data because because I have to grow more hair every time I take a measurement.