刃物を研ぐ砥石は、硬いほど粒子が細かいです。
砥石の価格は、形、硬さ、ブランドなどで決まってきます。
もっとも重要な点は、砥石の内部に不純物や割れが混じっていないことで、
その点で、私はNo.105をおすすめいたします。
No.105は剃刀の刃先の切れ味が悪くなった時に使います。
刃先が欠けてしまったときは、middle whetstoneを使いますが、
これは高級なものでなくても大丈夫です。
また、No.105を購入した場合は、あなたにNAGURAという小さい砥石をプレゼントします。
The price of the whetstone is decided by shape, hardness and brand.
What is the most important is that impure substance and crack are not included in the whetstone. For this reason, I recommend Number 105.
We usually use it when top edge of the knife does not work well.
When we lose the top edge of the knife, we use the middle whetstone.
In this case, the high quality is not necessary.
If you purchase the No.15, I am going to give a small whetstone called "NAGURA" to you as a present.
The price of a whet varies based on its shape, its hardness and its brand.
The most important point is that there is no impurities inside a whetstone, so considering that point, I recommend you No.105.
No.105 is used when the edge of a razor becomes dull.
When the edge of a razor gets chipped, a middle whetstone is used for that, but it doesn't have to be an expensive one.
Also, if you buy No.105, I'll give you a small whetstone called NAGURA as a gift.
二行目の"whet"は"whetstone"です。訂正いたします。