Stropping vs toothy edge?

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Dec 10, 2009
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I prefer a toothy edge and am pretty good at getting a nice sharp one. My concern is that I'm taking off too much metal every time I touch up my knife. That's when most knife guys say, "that's why we strop more than we sharpen." So am I simply screwed? Is there a way (maybe a really gritty strop compound) to keep my preferred toothy edge without removing too much steel? I don't think so, but you guys know more than me.. Your help would be appreciated - thanks in advance!
 
How coarse a grit/stone are you using? Just don't have as many "passes" with the coarser stones and pay attention. But generally speaking, if you are using anything coarser than "fine", it's probably too coarse. I only use a coarse stone for really dull knives or when I need to re-profile.

Have you ever worn out a knife in your life? I have.... but that was when I was a kid and my dad used a grinding wheel to sharpen my Case Barlow until I learned how. But I used it an awful lot for skinning (trapping) and sharpening was very a frequent thing. Back then, I wished I could afford a muskrat pattern slippie so I would have two blades to work with. But I couldn't afford one.

Give the ceramic rods kits a try for touch ups. (V type sharpeners.) You might like them.

A coarse compound would be no different.
 
It depends on how hard you use your knife, what you use to sharpen, the blade steel, and the edge geometry... but I've found that in my case, my edges need straightening or aligning more than they need resharpening. Stropping a toothy edge works for me because I sharpen it to be a bit toothy and then I don't overdo it with the strops when I touch it up. I'm also not obsessive about how sharp I can get it. As long as it's sharp enough for me... it's, um-m-m, sharp enough for me.
 
You can try backhoning on softer waterstones as a finishing/indefinite maintenance scheme - this is technically a very demanding method but yields great results.

Some light backhoning on silicon carbide sandpaper over a hard surface is also a good way to go. Depending on how toothy you're talking about, you can use a compound on a sheet of paper wrapped around the coarse side of a combination stone, or compound on balsa, poplar etc.

You can use a more coarse stropping compound, but the surface you apply it to has a huge influence over how it actually cuts the steel. Applied to a leather strop it will still smooth out the edge over time. You'll want to use something with as close to zero give as possible and the abrasive fixed in place nearly 100%, yet not so hard it raises a burr or only the smallest of burrs when backhoning.

The sharpening block I make was developed specifically to accomplish this as well, and be easily customized for whatever finish you're looking for - link through my signature below.
 
Go with a quality green or white compound (or no compound) and don't overdo it.
 
I prefer a toothy edge and am pretty good at getting a nice sharp one. My concern is that I'm taking off too much metal every time I touch up my knife. That's when most knife guys say, "that's why we strop more than we sharpen." So am I simply screwed? Is there a way (maybe a really gritty strop compound) to keep my preferred toothy edge without removing too much steel? I don't think so, but you guys know more than me.. Your help would be appreciated - thanks in advance!

It usually doesn't take much more than 1-5 very light passes on a coarse stone to restore toothy bite to an edge, so long as the edge isn't so far-gone as to force regrinding of new bevels. I wouldn't worry about taking too much metal off, unless the 'touching up' involves a lot of excessive grinding on the stone. A diamond hone of the appropriately chosen grit is a great way to do it, because it'll restore the 'bite' almost immediately and with a featherlight touch as well. That's how I maintain the tooth in a couple of Victorinox paring knives I use frequently, and steel loss at the edge has been essentially insignificant. What little stropping I do afterwards is almost always limited to bare leather or the thigh of my jeans; it's just enough to clean up the fine burrs, and that's all that's needed.

Most any compound used on a softish strop (like leather) will tend to work the teeth away eventually, with a tendency towards polishing. If using a compound to maintain toothy bite, a hard substrate will make the compound perform more similarly to a stone. Using the compound on a single thickness of paper over a stone or over glass will work better for maintaining tooth in the edge, as opposed to using the compound on a softer substrate like wood or leather or fabric.

To me, it's far more effective and simpler to just focus on improving technique with the stone by itself, utilizing ever-decreasing pressure to refine the edge and clean up the burrs, while still ensuring the toothy bite is left intact. Developing a very light touch for finishing is what will allow subsequent touch-ups to be done in a minimum of passes. Limit stropping to the absolute minimum afterwards, both as it pertains to the aggressiveness of compounds used and also minimizing the number of passes used on a strop.

Depending on the blade steel being used, 'steeling' a toothy edge on a smooth (polished) chef's steel can sometimes work well to maintain the teeth in an edge without removing much metal, and instead it just 'aligns' the teeth as mentioned earlier. Same could also be done on a glass rod, or on the smooth (glazed) edge of a ceramic mug/bowl/plate, none of which will remove much steel, but will help realign the edge. ALL of this needs to be done at very, very light pressure to avoid rolling or burring the edge.


David
 
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You can try backhoning on softer waterstones as a finishing/indefinite maintenance scheme - this is technically a very demanding method but yields great results.

Some light backhoning on silicon carbide sandpaper over a hard surface is also a good way to go. Depending on how toothy you're talking about, you can use a compound on a sheet of paper wrapped around the coarse side of a combination stone, or compound on balsa, poplar etc.

You can use a more coarse stropping compound, but the surface you apply it to has a huge influence over how it actually cuts the steel. Applied to a leather strop it will still smooth out the edge over time. You'll want to use something with as close to zero give as possible and the abrasive fixed in place nearly 100%, yet not so hard it raises a burr or only the smallest of burrs when backhoning.

The sharpening block I make was developed specifically to accomplish this as well, and be easily customized for whatever finish you're looking for - link through my signature below.
+1 on this,its the way i find works the best for me!mostly i just use a strop with green compound for maint.of my knifes,and sharpen only when they will no larger push-cut paper,try using some other compounds!!
 
I also like the butchers steel for my touch ups over the strop on toothey edges, or microbevel it at about 3 light alternating passes per side.
 
A toothy edge wears faster than a more refined polished edge and takes more maintenance as well. When assessing the condition of edge, whether toothy or polished its easy to confuse the cutting ability, comparing the two. My thumb approves of the toothy edge, where in reality the more refined edge cuts better longer and takes less maintenance.
The more refined edge takes more work, of course and I have always been loath to use my time in that manner. These days I sharpen on a 2 X 72 VS wet machine set up, taking but minutes to do what it used to take hours to produce. Each has its uses, in the kitchen its the refined edge for me.

Fred
 
Coarser edges tend to work better for plastics and some ropes, if life was all push cuts I'd agree with you though.
 
Without getting into a polished vs toothy debate as that wasn't what the opportunity was asking about stropping will not get rid of the tooth in your edge. Green Rouge is about 30000 grit. That's a big jump from the 400 or so grit finish you like using. It would take months of stropping to refine those teeth to a 30k finish. All you'll do it Polish the very tips of the micro serrations. They'll still be there in all their material chewing greatness! All the stropping will do is realign the edge and remove little burrs/hangers. I've gone off a 120 grit belt to a leather stropping belt which is 10000 times as aggressive as hand stropping. The edge does shine up to the naked eye. Look at it under a microscope. It's still a very toothy edge
 
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