Posts Tagged ‘knife sharpening’

Jende Hapstone V6 Has Been Unleashed!

February 9, 2017

The Jende Hapstone V6 is now in stock! This is the first collaboration with Jende Industries and the Hapstone Sharpener. We’ve got the V6 sharpener tricked out with the Jende red and black colors, as well as a couple of other goodies.

jende-hapstone-1

One of the benefits of the Jende Hapstone V6 aside from its striking beauty, is the option to accessorize like mad – you can choose from a full line of Shapton Glass stones, Chosera stones, and from our complete line of Color-coded Jende Nanocloth Ultra Strops with CBN and Poly Diamond emulsions as well as our Kangaroo and Leather strops!

And if that was not enough, the Jende Hapstone V6 also has a rotary sharpening attachment, which clamps blades and rotates them without the need to move the knife at all!

hapstone-rotary-attachment

So if you’re in the market for a new sharpener. make it a Jende Hapstone V6!

 

Shapton Glass Stones for the Wicked Edge!

October 18, 2016

Shapton Glass Stones are now available for the Wicked Edge Precision Sharpener (WEPS)!  The full 10 stone lineup includes grits from 220 all the way up to 30K, and you can now make your own customized Shapton Glass Stone Paddles for the Wicked Edge.

Shapton Glass WEPS Stones

Shapton Glass WEPS Stones

The Wicked Edge Precision Sharpener is such a great platform, and anyone who uses one knows just how diverse the accessory stone options are. Shapton Glass Stones are some of the best sharpening stones in the known universe, and until now, the only only way to experience them was by using them in the full size stones. Now they have been brought together to make the WEPS even better! Be warned that there may be a small mushroom cloud that forms when you first use the stones 🙂

320 Shapton Glass WEPS Stone

The extensive grit range is unparalleled, and includes 220, 320, 500, 1K, 2K, 4K, 6K, 8K, 16K, and 30K grits. Our DIY Shapton Glass WEPS Paddles allow you to mix and match your grits to get the combos you need, and come attached to a Wicked Edge Paddle. If you liked the Wicked Edge before, you will fall in love with it all over again with the Shapton Glass WEPS Stones!

 

Loading and Using the Jende Nanocloth Ultra Color Coded Strops –

September 20, 2016

We’ve done a quick and dirty video on how to load your Jende Color Coded Nanocloth Ultra Strops. These are the 4 micron 2×6″ with 4 micron CBN Emulsion and the 210×70 mm 0.25 Micron Poly Diamond Emulsion. Both strops and emulsions are color matched for easy recognition. 210×70 mm strops are designed to fit most stone holders as well. These strops are 3/4″ thick acrylic.

A special thanks to Mike Martinez of Martinez Blades and to Mark Reich of Reich Precision for allowing their razor and knife to make a cameo appearance.

TOG Elite Japanese Kitchen Knives Review

April 25, 2016

We recently received a TOG Elite Japanese Kitchen Chef Knife Santoku for testing. Bottom Line: This is one very nice knife that handles well, keeps its edge, and just plain looks good.

TOG Elite Japanese Knives

TOG Elite Japanese Knives

 

On the TOG website, there is a “Tech Specs” page that lists all the wonderful, interesting, and even nerdy things about the knives.  I’ve decided that my review will focus around the claims on that page.

  • “TOG blades are made from a special steel… to produce the ridiculously sharp blade and ensure that it stays sharp.” 
  • “Incredible cutting performance from a central layer of high-carbon (1%) steel. This core is made from… Acuto 440 that is similar to Western ‘440C’. This is hardened to Rockwell Hardness (HRC) 58-60…”

As an OCD sharpener, any claims to sharpness are always met with (rolled eyes or yawn) “Oh, yes, it is.”  I then proceed to lick the entire edge of the blade  – twice.  🙂 The TOG blade, however, actually looked and felt surprisingly sharp upon checking the edge right out of the box – sharp enough for me to not employ the old tongue test. So I went straight to the paper cutting test, expecting a typical 240 grit with a buffed edge feel. I was shocked by my first cut, so much so that I took another slice into the paper just to make sure. This thing cut -no- SLICED through the paper in a way that was not the usual factory edge. This was much, much better. I was truly impressed. If I had to call the grit, I would say about 3K. Score 1 for TOG right out of the box.

Edge retention is always going to vary depending on the user and the tasks performed, but when I sharpened up the TOG to my usual angles and finish, it kept up as good as, if not a little better than my usual knives (RC57-58). The knives in the rotation were all freshly sharpened by me, and used in a professional kitchen over a 2 week period with no special treatment (believe me!), and were only adjusted with a sharpening steel by the sometimes brutish kitchen personnel.

Steel junkies say what you will about 440C, but the Acuto 440 steel in this blade is perfect at RC 58-60. IMO, RC 56-60 is the Goldilocks hardness zone for high quality, non-custom kitchen knives – hard enough to hold the edge so that it does not require steeling after every cut, and flexible enough so that the edge won’t chip out. RC 58-60 also makes maintenance on the edge easy and straight forward on just about any good quality sharpening equipment, be it a steel, stones or mechanized sharpeners. I used 220, 1K, and 4K sharpening stones and got a smooth edge with just enough bite. As a sharpener, I am quite satisfied with the quality.

As for the feel of the edge when in use, it actually felt more akin to VG-10 steel, and not even remotely close the soft mushy stuff that your 29-piece knife set in a woodblock has (usually RC ~52). The overall balance and handling of the knife was easy and light, and the thinness of the blade allowed for easy cutting and slicing.

So to sum it up, this is one very nice knife that handles well, keeps its edge, and just plain looks good.

Thank you to the fine people at TOG for the opportunity!

Jende Ceramic Sharpening Steels under the Microscope

June 22, 2015

We wanted to document the speed and ability of our Jende Ceramic Sharpening Steels. Aside from having remarkable anti-break technologies in the tip and handles, they also actually work really well, as the microscope pictures will show. We freehand sharpened a couple of  Maestro Wu D-8 Nikiris (RC~58) from scratch and finished on both steels, and also demonstrated the speed of the steels by removing a chip on a customer’s custom Maestro Wu D-9 Damascus (RC~60). Pictures are with a Veho-400 USB Microscope, and the actual picture size is 1 mm wide by 0.75 mm high.

First, a picture of the steels – The white steel was difficult to see, so I also added a picture of a “dirty” section that had been used so the texture of the materials could be seen. Getting a picture of the black steel’s “dirty” section proved to be difficult as well. Basically, the surface of the steels is scaly looking, much like a reptile’s skin.

Jende Ceramic Sharpening Steels

Jende Ceramic Sharpening Steels

White Steel clean

White Steel clean

White Steel dirty

White Steel dirty

 Black Steel Clean

Black Steel Clean

Black Steel Dirty

Black Steel Dirty

For new sharpening, I generally start with an #80 Grit belt, followed by a #240 Grit belt, and follow with a #1,500 Shapton Pro stone. This is my “basic sharp”, and it will shave hair and juuust push cut. The picture below is the edge off the #240 belt, which is jagged, and usually has a significant burr, which is pictured in the picture below that.

1. 240 Belt A

1. 240 Belt A

 

2. 240 Belt B

2. 240 Belt B – notice the gem-like burr

I then cleaned up the edge on the #1,500 Shapton Pro stone, roughly 35 back and forth passes per side, followed by a series of about 15 single-sided strokes:

3. 1500 Pro A

3. 1500 Pro A

You can clearly see a micro bevel from the stropping strokes vs. the knife strokes. This is pretty much the result of using less pressure with single-sided strokes, and it helps put the apex on the edge of the edge. While some haters may have something to say about my lack of precision, in reality the micro bevel is only 0.04 mm high – meaning my variation is pretty darn low. What matters most is that my stropping/steeling strokes are consistent, which they are.

3a. 1500 Pro A Measured Variation

3a. 1500 Pro A Measured Variation

After the 1,500 Shapton Pro, I did 10 light, alternating strokes on the Jende White Ceramic Sharpening Steel:

5. White Steel A  x10

5. White Steel A x10

The result shows a noticeable increase in reflection at the edge of the edge, indicating some cutting/burnishing action. The apex of the edge has evened out a touch, but is still quite similar to the edge from the just the stone. The cutting test determined that the edge was more aggressive than that straight off the #1,500 Shapton Pro stone. The White Steel cut very quickly and aggressively, which is the way it’s meant to.

I then sharpened up a different D-8 on the belts followed by the #1,500 stone in the same fashion, and then went straight to the Black Steel and did 10 light, alternating strokes:

7. Black Steel A x10

7. Black Steel A x10

As my micro bevel shows, I am pretty consistent from knife to knife. But back to the point – the difference here from picture 3 above shows noticeable cutting/burnishing of the bevel, but less than that found in picture 5 from the White Steel – which is the way things are supposed to happen. More importantly, the edge of the edge smooths out, and the cutting test produced a practically indistinguishable result from the #1,500 Shapton Stone. That’s friggin’ impressive because my results off the #1,500 Shapton Pro are very difficult to beat. 😀

For the next trick, I used a customer’s D-9 Damascus (RC~60) that came in for sharpening. There was a nice little chip in the edge which would’ve been easy enough to remove on the stones and belts, but I wanted to see how many licks it would take with the steel to get to the center of this chip. I also measured the “gap” along the way. Here is the “before picture”, and the same picture below it with the measurement of the width of the chip:

10a. Chip Before

10a. Chip Before

10. Chip Before

10. Chip Before

Then, with 10 strokes of the White Steel: I used what I would call an aggressive amount of pressure since I knew I was trying to fix the chip. Again, the picture followed by the same picture with the measurement. The chip which initially took up the majority of the screen width at 0.77 mm, was now only 0.46 mm – generously. The deepest part of the chip was about only half of that.

11a. Chip white steel x10

11a. Chip white steel x10

11. Chip white steel x10

11. Chip white steel x10

 

Then I did 10 more aggressive strokes on the White Steel, bringing it up to 20 strokes. Only the deepest part of the original chip remained, with a width of only 0.24 mm.

12a. Chip white steel x20

12a. Chip white steel x20

12. Chip white steel x20

12. Chip white steel x20

 

I followed this with a third round of strokes, bringing the total up to 30. There was no real evidence of the chip left at this point. I looked up and down the blade for any other indications of the chip, and there were none.

13. Chip white steel x30

13. Chip white steel x30

In keeping with the mentality of these steels, the White (Mohs 9) is the aggressive steel while the Black (Mohs 8) is the finishing steel. I then took 10 light, alternating strokes on the Black Steel.

 

14. Black Steel Final x10

14. Black Steel Final x10

I’d say this looks pretty freakin’ good! At a macro level, you can visibly see the micro bevel from the steeling (picture size is 13 mm wide by 9.75 mm high, and the actual micro bevel is approx. 0.22 mm wide). And because of the geometry behind the edge is still established and intact, the knife actually still cuts very smoothly despite it not being a 5K edge anymore.

15. D-9 Macro Black Steel Final

15. D-9 Macro Black Steel Final

Overall, the Jende Ceramic Sharpening Black and White steels can do quite an amazing job of maintaining knives – and can even handle small chips. More importantly, when used in conjunction with one another, they can help your knife maintain its edge for an extended period of time before needing a full resharpening.

Jende Ceramic Sharpening Steels – Black and White Ceramic Rods

June 9, 2015

We are proud to announce our Jende Ceramic Sharpening Steels! They come in white ceramic (Mohs 9) and black ceramic (Mohs 8), and feature anti-break technologies in the handles and tips.

….and for those who have broken their ceramic steels with the slightest touch in the past – check this test out!

Knife steels are a staple found in almost every chef’s knife kit, but not much is known about the different kinds of sharpening steels out there. The Jende White Steel is triple fired, which hardens the ceramic material to Mohs 9. This added hardness is ideal for maintaining knives made with softer steels, and can be used for more aggressive steeling action.

The Jende Black Steel is double fired, which blackens the ceramic material and hardens it to Mohs 8. This hardness and density is ideal for maintaining knives with harder steels, and is an excellent finishing steel for quick touch-ups on the go.

The advantage to using ceramic steels over metal or diamond is the overall edge that is produced. Metal sharpening steels either bend an edge back into position without abrading (which is not necessarily bad in the short term), or rip the steel from the edge of the knife, substantially lowering the overall sharpness of the edge, not to mention making it very weak (which is just plain bad).

Diamond sharpening steels will abrade everything, but can be a little too aggressive if you’re not careful. This is good for aggressive maintenance, but for touching up an edge, it can quickly erode the initial edge geometry. Depending on the fineness of the diamond steel, it may also be diminishing the overall sharpness, and/or leaving a serrated edge.

The Jende Ceramic Sharpening Steels are designed with the idea that steels are used to maintain an edge in between sharpening. The Mohs 8 and 9 hardness of the steels work quickly and effectively, minimizing the loss of edge geometry while keeping the overall sharpness level intact. When using the Jende Sharpening Steels, it is recommended that your edge be sharpened between 1,000 and 3,000 grit .

Razor Honing with Jende Diamond Films

November 14, 2014

The new Jende Diamond Films are great for honing razors. I personally use the 1″x6″ size with PSA for all my razors, but you can use larger sizes, with or without PSA backing just as well! Here I go through the 45, 30, 15, 9, 6, 3, 1, and 0.5 micron films. For most razor applications, I recommend the Polishing Set from our website, which is the 15, 9, 6, 3, 1, 0.5 micron films (1K through 30K).

Jende Diamond Films – Using PSA and Non PSA

November 12, 2014

Our new diamond films come with the option of being PSA backed or non-PSA backed, and this video gives a quick how-to about securing your non-PSA film to a surface, and how to change the PSA backed film. This is on the 1″x6″ Edge Pro size films, but the methods will work on all sizes.

Diamond Films by Jende Industries

November 10, 2014

Abrasion resistant steels and ceramic knives are now an established part of the knife and tool world, and this requires diamonds in order sharpen them effectively. That’s why we are proud to introduce Diamond Sharpening Films by Jende Industries! We have 10 grits available, ranging from 80 microns to 0.5 microns (180 grit to 30,000 grit), and come in Wicked Edge Precision Sharpener (WEPS) size, Edge Pro size (1″x6″), 2″x6″, 3″x8″ and 3″x11″. They are also available with PSA and non-PSA backing.

2x6 jende standard set web

2″x6″ Diamond Films by Jende Industries

With a grit range that rivals that of some of the best sharpening stone series out there, our diamond films can handle profiling and repairs while bringing your edges to amazing heights of sharpness. Our films are also great for slip stone applications – they can be wrapped around dowels for sharpening serrated edges or the inside curvatures of turning tools, or used to polish the blade of old razors.

We’ve put together a few diamond film sets to choose from in order to get you started:

The Polishing Set includes one piece each of 15, 9, 6, 3, 1, and 0.5 micron films (1K to 30K grit), and is a comprehensive set that is geared toward general edge maintenance and regular repair work. Straight Razor honers will benefit greatly from this set, and those looking for shave ready knife edges will definitely impress!

The Standard Set includes one piece each of 45, 30, 15, 9, 6, and 3 micron films (320 to 6K grit), and is an “all around” set that can handle profiling and reasonable repairs. The 3 micron finish produces a mirror finish, and is “good enough” for most knife and tool applications.

The Coarse Set includes one piece each of 80, 60, 45, 30, 15, and 9 micron films (180 to 1,500 grit). This coarse set is meant for some more serious work, be it cleaning up scratches from belts or diamond plates, or for removing chips or reprofiling. The 9 micron film leaves a great “working sharp” edge that will hold up to abuse, and still do some serious cutting.

SharpeningForum.com – For All Types of Sharpeners

May 22, 2014

sharpeningforum.com

Sharpeningforum.com is now live!

Finally – a forum for sharpeners of all disciplines!

Most forums out there focus on individual kinds of sharpening, such as knives or scissors or woodworking tools; or on specific methods, such as freehand or the Wicked Edge or belt sanders. This is all good – but there are a lot of great sharpening techniques and philosophies that go unlearned or unexploited between the various sharpeners because there is just no cross-talk.

Sharpeningforum.com is designed as an open space where all sharpening related questions and experiments can be shared and learned from in an objective and supportive open-air atmosphere. There is also an area for knife/blade/tool, handle, scale and sheath making, as these areas often overlap with sharpening.

We invite all levels of sharpeners, and questions about all kinds of sharpening methods, tools, and techniques as we are all on our own journeys. Who knows,  you may just find yourself falling further down the rabbit hole! 🙂 So please stop by and check it out. Ultimately, it just a bunch of sharpeners who love talking about sharpening!

See you there!