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 Post subject: EP website notes and grit info
PostPosted: Mon Mar 04, 2013 12:25 am 

Joined: Wed Feb 20, 2013 2:22 am
Posts: 566
Has anyone visited the EP website lately? A few odd items on the first page caught my eye.

(1) A plea to stop reprofiling knives, with some interesting bevel wording. Don't get me wrong, I understand where he's going with that.

(2) A note about sharpening flexible versus stiff blades. It says that stiff blades shouldn't be moved along the table. Followed by some geometry that I can't wrap my head around and a statement that knives are thicker at the tip.

(3) A grit chart comparing EP stones to Chosera and Shapton that is very contrary to the unified grit chart.

I'm not trying to splash a turd into the punchbowl, but can some of the experts here provide opinion/narrative?

Cheers,

Rick


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 Post subject: Re: EP website notes and grit info
PostPosted: Mon Mar 04, 2013 7:43 am 
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Joined: Sun Apr 22, 2012 6:27 pm
Posts: 748
Location: Herentals, Belgium
On my phone and I didn't check, but to my knowledge the Grand Unified Grit Chart was made with the input from Naniwa, Shapton and Ben Dale.

Very odd.



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Michiel Vanhoudt

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 Post subject: Re: EP website notes and grit info
PostPosted: Mon Mar 04, 2013 8:04 am 
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Joined: Tue May 01, 2012 10:53 pm
Posts: 335
Location: Seattle, WA USA
A company called Boride Abrasives actually makes the Edge Pro stones for Edge Pro Inc. The latest version of the chart gives the information on them from the actual maker of the stones. The Boride made stones are graded on the FEPA-F scale. The latest version (6/12) of the chart reflects that info is how I understand it anyway.


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 Post subject: Re: EP website notes and grit info
PostPosted: Tue Mar 05, 2013 1:45 pm 

Joined: Wed Feb 20, 2013 2:22 am
Posts: 566
What caught my eye was that the EP website chart claims 600 and 1000 EP = 5K and 8K Shapton, respectively. I can't believe that to be true.


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 Post subject: Re: EP website notes and grit info
PostPosted: Tue Mar 05, 2013 5:31 pm 
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Joined: Tue May 01, 2012 10:53 pm
Posts: 335
Location: Seattle, WA USA
I agee with you. On the unified grit chart they list out closer to 1500 and 3k Shapton. To me that seems more realistic.


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 Post subject: Re: EP website notes and grit info
PostPosted: Wed Mar 06, 2013 6:18 pm 

Joined: Wed May 02, 2012 11:14 am
Posts: 186
Location: Florida, USA, Earth
I used the 1000 grit EP stone quite a while before using anything else. It will get a pretty shiny bevel except I always have a few random scratches on what otherwise is not "mirror" but pretty shiny nonetheless. I haven't used one for a while but I think it may resemble the finish of a 2k or 4k Shapton glass stone. The Shapton glass are a much more refined (for lack of a better word) stone capable of better performance when wanting ultimate results. But, I do think (assume) the grit numbers are pretty accurate concerning different stones. The EP 1000 grit stone is a pretty fine grit IMO. Also, Unless you really want superior results the EP stones are perfectly fine and will keep a knife edge is top notch shape for far less money. The great thing here is some people can't spend the $ for the Shapton (and others) priceframe. Actually, I shouldn't, given my financial standing, I just do it anyway. :) My 10 starving kids don't need new shoes this year anyway. :D I got the expensive stones just because I wanted to see how sharp I could get an edge, not because I needed it. I wonder who does actually need the super sharp edges. The only occupation I can think of is a surgeon. A cut with a razor sharp razor blade heals much faster than the same cut with a very toothy or dull knife. So, a surgeon would want this level of sharp so the victim (I mean patient :)) can heal faster. This is just me thinking and I could be way off.


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