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Shobu Tomae Koppa

  • This stone is a medium hard stone, with a slick feeling.  It develops mud quickly and is relatively fast cutting.  There is not a lot of give to the surface, and is harder than the takashima, hideriyama, and oouchi that we sell.  The finish doesnt have as much contrast, but the finish is much more mirror like.  Because the stone is a bit harder, there may be some streaking around curves.  However, the scratch pattern is fine enough to not be visible.  This stone seems to be a higher grit, and polishes the hagane to a mirror like finish, as opposed to the misty white finish that you might see from the hideriyama or oouchi we sell.  Though it doesnt provide the smoothest looking jigane, it can be easily followed up with fingerstones for great contrast, as the polish this leaves on the hagane is really really nice. I would call this stone in the 10k+ grit range.

    Natural stones from this region are rich in silica, which acts as a main abrasive. The potential finish can improve with extended sharpening, with results depending on the stone hardness, the pressure you use during sharpening, water, etc.

    This stone should be used like a splash and go stone... add just enough water to lubricate the surface, but not too much.  The goal is to develop mud, so keeping the surface very wet is prohibitive to mud development.

    • Grit Level: medium
    • Length: 198mm
    • Height: 22mm
    • Width: 63mm
    • Weight: 596g

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