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What is this Taiwanese black stone and where can I find it?

When lapping a stone, the 600grit does not remove particles in the size of 600 grit, or even 2k grit. Lapping is not like woodcarving with a chisel that removes big pieces of wood. Stone for our...

The world is full of hones. The Japanese ones are just the most famous. And, it's not just volcanic activity. Under there, there should be the correct conditions, temperatures, pressure, for the...

Regarding this post, I don't remember where I read about the 0.49 micron scratches, but I do remember that it was a reliable person and kind of makes sense. Looking at the photos of scratches from a...

No, I wasn't thinking a specific article. But i will read those. I am sure that at 2000x magnification we will see many more details, and they do look really cool. But this 50x, it's enough to show...

I do like the idea of checking the edge with under a microscope, but, I'm not sure if you will need a 400x or more microscope. Steel has its limits, and you can see them at 50x. With 2000...

The abrasive from the shapton 30k are not equivalent to 30k grit. You can clearly see it from its scratch pattern. The scratch pattern from a coticule is much finer. (we are not talking about shaving...

A microscope, even one with 5000x magnification will not be enough. Those particles are not pure abrasives. They are both pure abrasive particles, pieces of abrasive with binder, and binder...

I don't think that the "slurry pictures under a microscope" shows us the grit of a stone. They are pieces of abrasive glued or whatever it is called with pieces of the binding material. I don't think...

From what I have read here, the grit of the finest Japanese naturals is around 2 to 1 micron. Then they brake down into smaller particles, which means, the particles with the 2 to 1 micron sizes are...