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 Post subject: Re: Testing Sharpness
PostPosted: Mon Jul 07, 2014 7:17 pm 

Joined: Sat Mar 01, 2014 7:15 am
Posts: 1341
Location: Raleigh, NC
Well. That was not what I had been expecting. As always, the more I learn, the more I see there is to learn.


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 Post subject: Re: Testing Sharpness
PostPosted: Mon Jul 07, 2014 10:13 pm 

Joined: Sat Jun 21, 2014 10:58 pm
Posts: 38
Location: Norwich, England
Phone book test is amazing. Need all my knives to do that :)


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 Post subject: Re: Testing Sharpness
PostPosted: Mon Jul 07, 2014 10:15 pm 
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Joined: Thu Nov 22, 2012 4:17 am
Posts: 4579
And by the way, that was Shaun Fernandez, MrKnifeFanatic himself doing the cutting there.
I did it with a couple of my knives and it's pretty crazy!



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 Post subject: Re: Testing Sharpness
PostPosted: Mon Jul 07, 2014 11:43 pm 

Joined: Sat Mar 01, 2014 7:15 am
Posts: 1341
Location: Raleigh, NC
How was that knife sharpened?

I have to try to find a phone book now.


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 Post subject: Re: Testing Sharpness
PostPosted: Tue Jul 08, 2014 12:46 am 

Joined: Thu Jul 04, 2013 5:27 pm
Posts: 56
Andreuha - Thanks for the info, I'm not interested in a sharpness test that significantly dulls the knife. I've used copy paper in the past and just looked at how far out it can push cut, I think I'll stay with that method.
Ron


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 Post subject: Re: Testing Sharpness
PostPosted: Tue Jul 08, 2014 1:37 am 
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Joined: Tue Oct 23, 2012 1:14 am
Posts: 604
Location: San Ramon Ca.
I once had a customer do that fingernail test for sharpness and cut right through her fingernail and into the finger. Still makes me cringe thinking about it.

I use the tip of my thumbnail to check a finished edge for flaws. Cut printer paper for a slice and push cut test and to check for any burr I may have missed. Final check is slicing wadded up paper towel.

Oh and by the way Shun MV steel sucks.



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 Post subject: Re: Testing Sharpness
PostPosted: Tue Jul 08, 2014 1:12 pm 
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Joined: Sat Mar 22, 2014 2:38 pm
Posts: 232
hopefully, Jason B. will chime in on this one for an explanation. in one of Jason's videos, can't remember which one, he explains a little of what he's doing when testing the edge. it looks like he is tapping the edge against his fingernail, and listening for a burr. i think the idea is that if a burr is present, the sound will be different, but i'm not totally sure. i would love to hear an explanation from you Jason, and be able to add this to my edge testing routine after i understand it better. thanks!

pat



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 Post subject: Re: Testing Sharpness
PostPosted: Wed Jul 09, 2014 3:49 pm 

Joined: Tue Jul 24, 2012 1:28 pm
Posts: 527
I've tried them all but nowadays I just feel the edge with my thumb, if my thumb is dry, to see. Often though I use a tomato, it's still for me the hardest test to pass but offers a level of satisfaction. I 've gone through at least 10 phonebook too.
Thanks for asking the question Lepus.


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 Post subject: Re: Testing Sharpness
PostPosted: Wed Jul 09, 2014 5:33 pm 
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Joined: Mon Apr 23, 2012 7:36 pm
Posts: 2866
It has no practical applications.....but cutting a hanging hair is the end all of sharpness tests for me.

Practically....a ripe tomato.



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 Post subject: Re: Testing Sharpness
PostPosted: Wed Jul 09, 2014 7:27 pm 

Joined: Fri Dec 20, 2013 4:24 pm
Posts: 309
Yeah I run it along my leg an mm or so off the skin. When it catches a hair I can feel the pull and I know its hair splitting sharp.


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