Beyond Hair Whittling Sharp?

[Jason B.]

With a paper tube, I found that it more has to do with technique, if I hack at it with a horizontal cut, it won't cut all the way through it, if I cut diagonally downwards with a slash, it goes right through it.

This is true when you cut anything with a knife, 45 deg. seems to be the sweet spot with slash cutting.

 

[nozh2002]

The demonstration involves cutting cleanly through the bottle. I thought that was pretty apparent in the video. So obviously those dull edges did not cut through the bottles cleanly - swinging your knife at the bottle, sending it flying through the air in one piece, and seeing you've cut a third of the way through a bottle, is not the same as zipping cleanly through them. So obviously to cleanly split the bottle requires a sharper edge then what you have shown in your post about how easy cutting a water bottle is (without actually cutting one in half) - and cutting a paper tube is harder.

I don't recall exactly what your point was, but maybe if you keep trying, someday you can successfully do some of these tests "beyond hair whittling". I probably could have saved you some time and told you it is easy to do them unsuccessfully!

Those knives are not long enough to split bottle you need >4" edge. Those dead edges made cuts and obviously if they long enough they will cut bottle on pieces. But I will not dull any other knife to proof what already is obvious.

I will stay with hair whittling and thread cutting statistical test. They are good enough for me.

Thanks, Vassili.

 

[Broos]

With a paper tube, I found that it more has to do with technique, if I hack at it with a horizontal cut, it won't cut all the way through it, if I cut diagonally downwards with a slash, it goes right through it.

But you can cut through a paper horizontally. If the knife is sharp enough and the planets are in alignment. Phil Wilson S30V.

 

[Roger999]

But you can cut through a paper horizontally. If the knife is sharp enough and the planets are in alignment. Phil Wilson S30V.

Can you hack through it horizontally? I can slash through it horizontally but not hack through it.

 

[Broos]

Just a natural backhand horizontal stroke through the paper. That is regular copy paper (easier to cut than telephone book paper).

 

[thombrogan]

I cry foul, no fair on that one! It has a Phil Wilson grind and a Phil Wilson heat-treatment. That's cheating.