so not sure if this is just a generic question or if you have a specific purpose in mind. if all you want to know is how to measure edge thickness and or make something really sharp but it won't hold that sharp edge then that's more just a theoretical question. If you want it really sharp and want it to stay that way, then the whole Heat Treat, Blade geometry question comes into play. As far as minimum edge thickness to shave, I've heard Obsidian is something like 1 micron and the best steel can do is somewhere around 50 microns, but not sure where I saw that and may well be getting the facts a bit off.
Last edited by mtnman1; 06/27/12.
