About This Item
Vintage Renge Suita Japanese Natural Sharpening Stone 1160g (2lb. 9oz.)
It has still a part of Hatahoshi stamp from Hatanaka Toishi Co. on the sharpening surface. Hatanaka used to carry many mines stones included in Nakayama.
I do not know which mine it was from. It looks the color of the stone is more like Uchigumori color. It might be Ohira suita or Mizukihara suita or Yaginoshima suita or somewhere else mine in Kyoto.
205mmX76mmX30mm It should be great for high carbon cooking knife or Japanese plane or chisel I do not know how it is called the pattern on the sharpening surface, and It might hard to see with pictures, but it has renge pattern on the sharpening surface too.
It raises great amount of black color slurry quickly. It looks fast cut stone in the fine grit stone.
(Scale; 1 to 10, 1-3 is very soft muddy rough grit whetstone 3-6 is soft medium grit whetstone, 6-8 is hard medium grit whetstone, 8-10 is fine grit whetstone)
Particle Size------ 8.9
(Scale; 1 to 10, 1-3 give deep scratch marks to the steel, 3-5 is delete the 1-3 scratches, 5-8 makes the steel cloudy, 8-10 makes the steel semi-mirror finish or mirror finish)
It makes my blue II steel blade knife Jigane to frosted silver color, and Hagane became semi-mirror finish.
Probably around from 6000 grit or higher. Natural whetstone has wider capacity than artificial whetstone, and actually, we do not know until sharpen blade on the hone for a while. Because artificial whetstone molecules do not break down to smaller sizes, but Natural whetstone molecules are possible to break down to smaller sizes, and those molecules are mixed with sharpened steel molecules, and make Jigane as suitable Jigane color (it also shows Damascus pattern vividly), and Hagane as suitable Hagane color. It is natural mystics.