The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details:
https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is $300 $250 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
From a couple decades of "testing" both edges in cardboard , from single wall to quadruple wall , . . . this is almost daily testing by the way as I unbox machines almost ever day . . .My EDC either a Guardian Tactical.025 Elmax or Kershaw Livewire Magnacut. Both knives were ground on 1000 CBN, honed on a Tormek with Tormek’s honing compound and finished with a Tormek honing wheel with DMT 1 micron diamond paste to 85/95 on a Bess Tester. I strop whenever the apex looses it’s super sharp edge (above 110 or so). I like to be able to push cut and can strop my knives back to sub 100 in short order with the wear resistant steel unless I really bugger up the edge. I like a refined edge because I can.
On others knives I finish at 600 and hone on the Tormek Honing wheel with their paste. I believe in most cases the end user will believe their knives perform better with teeth and the “teeth” does make the knife able to slice longer between sharpenings, albeit duller. When the edge is polished, once it starts to dull, it can’t get the job done. Toothy finishes perform better than polished, as they start to degrade. That’s why I use a toothy edge on customers knives.
I have read the above research and agree with that quality wear resistant steels can handle a more acute edge angle and a polished (or near polished) edge is able to cut more accurately and stays sharp longer than a toothy edge, if it is maintained. Many, in fact most of the knives I sharpen are not quality wear resistant steel, rather “German Stainless” or some other economy steel. I find when polished those edges don’t take long to dull , hence the teeth. Vadim showed on a blade with teeth the teeth can tear off and leave a jagged edge that can still cut, albeit a rough cut.From a couple decades of "testing" both edges in cardboard , from single wall to quadruple wall , . . . this is almost daily testing by the way as I unbox machines almost ever day . . .
And since quadruple wall cardboard is the " toughest " thing I cut as in what puts the most stress on the blade near the handle ( I still don't need 4mm thick knives). The MOST EDGE DULLING media I cut is a kind of wear resistant rubber like material which will consistently dull "regular " blade alloys to unusable in less than a day no mater what edge is on it.
I have gleaned these facts :
Thin cuts (to quote Ben Dale , inventor or the Edge Pro knife sharpener)
Polished edge bevels and sides of the knife (angle grind ) slides through the work with less effort .
Toothy edges (and grind lines ) create resistance in the cut and pick up fibers from the work therefore increasing resistance even further .
Bottom line(s) and elaborations :
a THIN BLADE 0.4 mm up to 2mm (think box knife and or paring knife (which I use almost daily for the quadruple wall )) cuts better even when the blade is dullish than a blade with a 3mm to 4mm thickness and a 100 Bess .
an acute / thin edge grind 10 to 12 degrees per side further reduces the cutting resistance even when the edge is dullish than either of those knives with a 17 to 22 degree per side and < 100 Bess
and
Polished sides with radiused transition between blade grind and edge bevel (is this what everyone is calling "convexing" (seems to be a gray area for me) then polished all the way down to the edge . . . cuts better dullish than normal grind lines with toothy BUT 100 Bess .
The only change I make for cutting the wear resistant rubber like material is to use high vanadium / high tungsten / high hardness blade alloys with the very same edge geometry and finish . These cut for days and even weeks in this rubber.
besides
a sub 2mm at the spine and 10 to 12 dps at the edge is easier to strop / resharpen to crazy sharp . For trimming my finger nails and shaving my face before I go out to celebrate yet another super successful and satisfying knife day .
(try trimming your finger nails with a 40 degree inclusive edge at any level of sharpness and edge finish you like .)
Why do we need a 40 degree inclusive edge again ? I forget .
The only way to get the blasted thing to cut for very long is to put a saw edge on it .