Thread: TNT old school advice?

Sure it's destructive. Instant edge roll. Even cutting a piece of paper can roll the edge a bit. The apex width is down around a tenth of a micron or two on a very keen razor. That's .0000001m (or .0000002m) (= .0000039" or .0000078") in case anyone is unaware. A hair is about .003" on average. If you have ever handled aluminum foil, that's about .0005". Steel foil of the same thickness is about as flimsy, so you can imagine how flimsy the apex at .000001m (this is ~ 1/130 the thickness of the aluminum foil) would be.

The TNT can be useful at the bevel setting stage, but you need to hit a few more licks on the bevel setting stone after doing it, and afterward I certainly wouldn't use it again.