Lots of layering, I lapped numerous areas to test.
Very green stone. I need more homogeneous samples.
This layer was interesting, faintly purple and very smooth.
Interesting.... Definitely some polishing going on here.
What are those weird looking things? Bet you thought that I never used artificials, did you. 5000 grit. Hazy mirror finish.
Yep, definitely polishing. The stone makes a bit of slurry, but wanted a nagura so I used the ODC. It feels like my ink/sharpening stone, kind of sticky but you can feel it working. I sharpened on the long axis. All of the scratches that I can see are from the artificials. I will lap these samples to make a larger sharpening surface..... interesting!
As often happens, after using the man made stones I question the whole endeavor. For about 5 minutes. That's about how long it takes to erase the deep scratches and clean up the mess. I pretty much only use them outside where I have a hose and the funny colored grit won't hurt anything. They are pretty fast, though. As I may have mentioned, the naturals are splash and go and don't really make much of a mess. It feels a bit like searching for the holy grail, sometimes. For whatever reason, the naturals just FEEL right.
OK, after a sleepless night (well, I'm not THAT obsessed), I lapped a larger surface to make for a more thorough test...... but first, the man made stones, even the 5000 grit left too many scratches. To be as certain as possible about the origin of any scratches that may occur, I polished the edge using 2500 grit wet/dry paper to get a nice mirrored surface. That left pretty impressive marks too, but it's the best that I've got. Really easy though. The stones did all of the heavy lifting. Why not just use paper for the finish? It IS more consistent, gritwise. P2500 is the equivalent of about JIS 2300, so this is a step back in grit, but the paper leaves a very even pattern that appears more polished.
Nice dark slurry ( need to finish lapping the stone, though)! If you zoom in, you'll see the camera lens reflected in the steel.
The stone definitely polished out the P2500 grit scratches. For reference, I made the P2500 scratch pattern 90 degrees to the cutting edge. The stone did leave a few new scratches. They are pretty much the only marks left and you can see them if you zoom in. There must be a few sharp bits in the stone, or MAYBE some diamond grit got shed and imbedded. More on that later. This is looking VERY promising..... Not particularly fast, but finer than the other stones that I've got.
While I was frantically trying to remove scratches from metal, Ellie made a fish trap and caught some fish.....
Here fishy fishy fishy..
A wonderful day!