My first knife on the 5K/10K Choseras
- This topic has 9 replies, 3 voices, and was last updated 05/04/2012 at 10:39 pm by
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The Chosera 5K and 10K stones had arrived some time ago and finally I was ready to use them. Would they really make the edge sharper than the stock stones?
The knife I was going to sharpen was a Laguiole knife custom made by Renaud Aubry for a bunch of Dutch knife nuts. It had a blade of 12C27 steel with a hardness of 57-58 HRC.
I started with the usual progression of 100-200-400-600-800-1000 grit stock diamond stones followed by the 1200 and 1600 grit stock ceramic stones. I sharpened the edge at 20 degrees per side.
Below is a picture of the edge after the 1600 grit stones.
Then it was time to use the Choseras. They are thicker than the stock stones, so I needed an angle cube to mount them properly. I was prepared for some fiddling, but this really was a breeze. I also did not need change the rod joints by 90 degrees, something I had seen some people do.
One of the reasons (although not the main reason) I initially chose the Wicked Edge over the Edge Pro was that the stock stones could be used dry. However, the Choseras are water stones. So I soaked them for 5 minutes and made sure I kept them wet during sharpening. Fortunately, it did not become a water bath: the Choseras need only a minimal amount of water and as soon as soon as the water or the slurry drips off, you have used too much water. (Obviously it did drip off the first time I used them, but I quickly learned 🙂 .)
Sharpening using the Choseras was easy, not really different from the stock stones. Although they do feel smooth, very smooth.
After the 5K Chosera stones, the edge had become only slightly sharper than after the 1600 ceramics: it did push cut paper, but the edges of the cut were slightly ragged. Not surprising, since the 5K Choseras rank about the same on the grit comparison chart as the 1600 ceramics. Below is the result.
However, after the 10K Chosera stones, the edge was truly sharp. It shaved arm hair without any problem and did push cut paper like butter. (I am saying push cut here, no cheating by secretly slicing!) Below is the result.
Would it shave my face? I tried. Well, it would. But only with a lot of effort. So I stropped the edge using 1 micron diamond spray on balsa, followed by 0.5 micron spray on balsa. I finished using plain top grain leather strops. See below. Ain’t she smooth?
The knife did not yet pass the hanging hair test. But would it shave well? I tried again… And yes, it shaved my beard!
When I started sharpening seriously a few months ago, my mission was to get a knife so sharp I could shave with it. Mission accomplished! 😀
See my blog[/url] for the full series of pictures.
Oh, I almost forgot to mention that the Choseras produce a beautiful mirror edge.
Molecule Polishing: my blog about sharpening with the Wicked Edge
Looks good, Mark!!! :woohoo:
Once you get used to how light the Chosera paddles are compared to the diamonds, you can lighten up even more on the touch for a better shave!
Since we started the SOTD thread, here’s Josh’s razor (aka razoredgeknives). It’s a Joseph Rodgers HOllow Ground that he first sharpened, and it shaved great!
I then sharpened it on the WEPS @ 16-16.1 degrees using the WEPS 800/1K Diamonds, the Chosera 800, 2K, 5K, and 10K Stones, and finishing on the .125 CBN by Ken Schwartz, and plain leather. It passed the HHT.
The shave was exactly what I expected – a little “strong” but smooth and clean!
Nice picture, Tom! I’ll also have to try to turn the rod joints by 90 degrees to see what extra freedom you get.
Dumb question… Why would you use a guided angle sharpening system for a knife that has its own guided angle system built in, like a straight razor?
I’ll try to see what I can do to further sharpen the edge, Josh. From reading on the Internet, it seems as if people like finishing their razors with stropping compounds in the area of 0.3 – 0.125 micron and that hair-popping starts in that region too. I haven’t got any CBN at hand, but still some diamond spray and a lot of Dovo green paste :-).
Just for my information: what is a “smooth” finish (versus a diamond finish) and what is a “strong” shave? I know what it feels like when a straight razor or a knife tries to drag hairs or when it scrapes my skin. But those words sound a bit like the words in which wine nuts describe their wine tastes
.Molecule Polishing: my blog about sharpening with the Wicked Edge
Yesterday I did my second knife on the Choseras, a Benchmade 940 Osborne. It is one of my favourite EDC’s. Man, that knife got wickedly sharp again.
After the 5K/10K Choseras I stropped it again using 1 micron diamond spray and 0.5 micron spray. And then I shaved again, this time a full face shave!
It became quite a bloody affair. It took me four cuts to realize why. When I had stabbed myself for the fourth time, this time under the chin, I realized the knife also has a very sharp tip
.You can read the full sharpening story and see the pictures here.
Update: afterwards I found out I still had some 0.125 micron CBN spray. I stropped the 940 with it on balsa. Unfortunately the edge did not pop hairs and it also did not feel much smoother. Could this be because the 0.125 micron CBN particles were hiding in the balsa? I have had tips before not to use anything smaller than 0.5 micron on balsa.
Molecule Polishing: my blog about sharpening with the Wicked Edge
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