- Joined
- Jun 4, 2010
- Messages
- 6,642
Have been carrying the Jarvenpaa puukko from the WB videos since I made them, without any further maintenance - about a month and a half now. Have done an overnight backpacking trip as well as daily use since then, much of the wear on the blade is likely from cutting my daily apple and not wiping the blade completely dry, so tarnished as well as worn. many boxes, small pieces of wood, I can't remember all of it...Still, some of the edge wear is fairly nasty. The blade couldn't cut paper cleanly, wasn't three finger sticky, and could only shave arm hair when it snagged some. Due to the Scandi grind at about 24 degrees, it was still cutting reasonably well for a dull knife. One thing that I thought was exceptionally interesting is the second wear image at 1000x. To the unaided eye it just looked like it was throwing back a small glint of light - up close you can see what looks like the edge fractured or flaked off and the grind pattern just sort of stops at a worn ledge. This knife holds an edge very well, better than my other carbon steel knives for the most part, so I don't believe there's any issues with the steel and it wasn't exemplary of the edge as a whole - must've hit something that didn't agree with it. An awful lot happens over a month and a half.
In the only 400x pic, the red blob out of focus upper right is a spec of red toner - 5u average size, a bit smaller than a single red blood cell. Gives an additional feel for how short the depth of field is at this magnification.
Anyway, about 40 passes on the WB, stopping half way in to apply a second hit of compound, and another 10 or so on two sheets of plain paper - back to scary sharp. Wait for it..."CLEAN UP YOUR EDGE!"
First two pics at 1000x before reconditioning.
First one looking rough:
And looking real rough:
Now at 400x after getting worked on:
And at 1000x - totally unrecognizable, thank goodness! That knife was in embarrassing shape but made for a good experiment/QC - back to three finger sticky tree-topping in about one tenth the time it took to catch the pics.
Won't update the listing till Friday, but some WBs are starting to escape my workbench already, feel free to contact me with any questions or comments.
HH
In the only 400x pic, the red blob out of focus upper right is a spec of red toner - 5u average size, a bit smaller than a single red blood cell. Gives an additional feel for how short the depth of field is at this magnification.
Anyway, about 40 passes on the WB, stopping half way in to apply a second hit of compound, and another 10 or so on two sheets of plain paper - back to scary sharp. Wait for it..."CLEAN UP YOUR EDGE!"
First two pics at 1000x before reconditioning.
First one looking rough:
And looking real rough:
Now at 400x after getting worked on:
And at 1000x - totally unrecognizable, thank goodness! That knife was in embarrassing shape but made for a good experiment/QC - back to three finger sticky tree-topping in about one tenth the time it took to catch the pics.
Won't update the listing till Friday, but some WBs are starting to escape my workbench already, feel free to contact me with any questions or comments.
HH
I wouldn't part with mine for any other sharpening tool out there. 
