About the Musashi Rosewood Shirasaya
QUESTION: I have the Musashi Rosewood Shirasaya and after cutting some water bottles, buddy bottels, milk jugs, cardboard and some small sticks a decent amount of cutting. But it cant cut them any more maybe I cut more than it could handle but do you think the blade could become dull just from that.
There is one target there that could cause some dulling - and that is CARDBOARD. Cardboard is notoriously tough on a sharp blade, mostly because there are many rough particles in cardboard that will cause any sharp sword to lose its edge quickly.
Cardboard is a good medium for semi-sharp swords (such as those produced by Windlass Steelcrafts with a 1mm edge) - but a sharp sword will lose its sharpness very quickly cutting it.
All the other targets should not cause any dulling. It seems strange I know, but that is cardboard for you!
Hope this clarifies things.