You can, however, dull an edge quickly and efficiently by using inappropriate sharpness tests. The TPT is one such test.
Gotta disagree with this one.
Testing with the thumb pad after stropping is very appropriate. It is taught as a way to judge stropping progress in every barber manual I've read, and has never dulled one of my blades.
Last edited by honedright; 10-02-2009 at 04:15 AM.