-7%
Shapton Ha-no-kuromaku sharpening stone #320 Medium coarse
Shapton Ha-No-Kuromaku professional sharpening stone,
High quality Japanese water stone from Shapton with a grain size of # 320 grit. The Japanese stone manufacturer Shapton, from Nabatame, (Tochigi), makes the hardest stones. In contrast to almost all other brands, Shapton stones remain flat longer and do not need to be flattened often. The grinding process feels very different than when working on softer stones. One can feel the relative hardness of the stones. The 320-grit stone works about as fast as the 400-grit SUN TIGER from Matsunaga. This specific line of Shapton stones we offer is the Ha-no-kuromaku line which literally means 'sharpness behind the scenes'. It is very important not to leave these Shapton stones in the water for too long. 5-10 minutes for the coarse stones is more than sufficient and the polishing stones (from # 4000) only need to be immersed for a short while. These stones are made of ceramic powder with a synthetic resin binder. These stones are therefore more sensitive to moisture than "baked" stones such as the Zanmai or Matsunaga stones.
Properties:
- Dimensions of the stone: 210 X 70 X 15 mm
- Grain: # 320 grit
- Synthetic resin bound Abrasive: Silicon carbide (SiC)
- Stone is supplied in a plastic box that can also serve as a standard.
Particularities:
The stone has a low moisture absorption, so after wetting the stone, grinding can be started immediately
- Very high hardness and slow wear
- Very long life
Grain size (Grit) The grain size of Japanese grinding stones is expressed in a number. The higher the number, the finer the abrasive grain and the sharper the result. In principle there are 3 types of stones: Sharpening stones (Japanese grain size 80-400) Whetstones (400-3000) Polishing stones (3000-30,000).
The stone to be started depends on the time available and the condition of the knife. If the knife is really blunt or has damage then you start with a grindstone. Then a whetstone can be used to refine the cut. With a less dull or undamaged blade, you can immediately start with a whetstone (for example a 1000 or 1200 stone). It is essential to finish with a polishing stone (normally between 4000 and 12000 grit), this is intended to get the blade razor sharp. The combination between a whetstone (1000 or 1200) with a 4000-12000 polishing stone is in our opinion an ideal starter package. Polishing stones above 8000 grit do not necessarily produce a sharper result, this is also due to the steel grade.
The stone holder with rubber feet can be ordered separately.
