Bet with a friend. Can you shave your arm by......

G

Get Sharp

Joined
Jan 12, 2015
Messages
15
So he says that you can tell a sharp knife by if you can drag it backwards and pop hairs. Now this made no sense to me and said that its not possible but he swears he has seen it. So my theory is that the knife was sharpened and at the end the edge rolled to one side and was not correct but did enable it to shave backwards. What do you think?
 
Ugh Huh, is your friend a big snipe hunter? Haha :D You know I could see your theory maybe working if the stars really aligned for someone...but if money's involved I'm sayin your friends full of it haha. Welcome to blade forums by the way :thumbup:
 
Thanks Its great to be here!
Yeah I would say the guy that said it who is a chef and sticks by his story I would say he was lying but my friend says he saw it so.... LOL
 
If it's not a burr he should be able to do it with both sides of the edge...
 
Wouldn't that be something. I would shave with a straight razor daily if all I had to do is strop it on my face.
 
I have two nice "paper cuts" to my thumb from a rolled edge. After a few swipes on 2k grit paper then a stropping the blade is still toothy but at least I straightened it out.
 
Are you sure he was talking about the knife or going against the natural fall of hair. I've seen some shave with the way the hair lays on the arm/leg and some go against the direction of the way the hair lays.
The only one I've seen do that is a doubled sided sharpened dagger :)
 
Ajack60 said:
Are you sure he was talking about the knife or going against the natural fall of hair. I've seen some shave with the way the hair lays on the arm/leg and some go against the direction of the way the hair lays.
The only one I've seen do that is a doubled sided sharpened dagger :)
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Yeah because all of my knives you can shave with and he gives me a sure but come back when you can shave just by pulling back. Like I'm the jack ass. LOL I told him well its not like i don't do this fr a living. (Which I do)
 
You cannot shave hair by stropping the blade on your arm. Lol. Strops would be messed up and obsolete if that was the case.
 
I suppose if you laid the edge flat against your arm and applied a lot of pressure into the arm as you dragged the edge backwards it MIGHT be possible for the skin to bulge up as the edge passes off of it and force the hair against the edge as that happens, resulting in cut hair. But that sounds a little risky to the rest of the arm too, not just the hairs!
 
A blade is super sharp when you can take one hair and bring it done to the edge and it pops. The old hangin hair test. Or if it will whittle a hair. That's where it's at! :)
 
Tell your friend that the laws of physics apply to really sharp knives just as much as they do dull ones. Without a serious burr its just not going to happen.
 
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