u/Eeret

Got a bit scammed on this stone. As you probably noticed it has big inclusions that need to be removed here and there and the line is toxic. On top of everything someone extensively used oil on its surface so it's kinda soaked in it.

Stone is on a softer side but not crazy mudmonster soft and the particles are rather fine so I guess it wasn't a complete waste of money.

The slurry is easily generated which prevents super crisp edge from forming, with some skill applied it gives an ok kitchen knife finish.

Unfortunately it is not suited well for polishing soft steel and leaves wide annoying scratches, on harder steel it can be managed but inclusions are the real pain.

The polishing pic is worst case - cheap shirogami knife, steel in the last pic is vg10.

Bought a set of these Aogami#2-SUS410 Xinzuo knives. The intent was to thin the bevel right from the start but after bunka got chipped I decided to polish it too.

Long story short I learnt the hard way that SUS410 is not fun to polish by hand AT ALL.

Also is it worth 150$?

10 minutes with tenjou nagura slurry

Just reminder to everyone you don't need JNATs to have fun with polishing

Hardness: 4+

Fineness: 4+

Slurry generation: needs some pressure to get going

Hard uchigumori, yake parts are softer which is useful to get the slurry going but with big knives it is still easier to use diamond nagura. Because of its properties puts a nice edge on knives.

Hardness: 5

Fineness: Medium

Slurry: hard to produce without nagura

Water absorption: below medium

Best application: edge sharpening

Really nice knife sharpening stone. Hard, removes metal, slurry can be worked down to finer result. I start with white Aizu nagura, which is from a softer but also coarser stone to speed up metal removal. For finishing stages I usually get diamond or sintered ceramic nagura to raise slurry and finish on wet clean burnished stone.

Scratches on both soft and hard steel when working with wide bevels, so polishing is rough.

Hardness: 3.5

Fineness: 3.5

Slurry: easy to produce

Application: knife edge sharpening and polishing

Nice knife stone, works around 3-5k, good finishing stone for harder steel knives, the edge is not superfine and its easy to overwork it because of stone softness and slurry.

It sheds a bit of scales into slurry that scatch jigane too much. Can still be used as in-between stone for polishing after Naka toishi like Aizu.

Hardness: 5

Fineness: 5

Slurry: hard to produce

Stickyness: higher than average

Small rock of "not real" uchigumori from maruoyama mine, not an easy one to polish with but gives actually very nice fine edge with very tiny barely noticeable scratches.

Not glassy all the way and slowly starts producing slurry after a minute of work.