Thanx for the explanation Pyment.
Just to know if I am wrong. If a stone is called Nakayama Karasu stone that means it is a Karasu stone from the Nakayama mine, correct?
If that is correct and mine is obviously Karasu, but can you also see from which mine it comes?
''Karasu'' means dark spots. That is funny because in Turkish ''Kara su'' means dark water.
The stone I have is definitely a hard stone. It produces
little slurry by itself. I use the diamond lapping stone(15-20 seconds or so) to produce a little bit of slurry.
Good info. Exactly my impression. Today I was tryingQuote:
The stone is Karasu, and they are supposed to be the finest for finishing blades. Karasu are very hard therefore scratchy, when you practice on it you will discover the right amount of pressure and slurry for best results.
the stone again and found out I had to use less pressure to make my chisel really glide over the stone.
When I sharpen my chisel on the 8000 Naniwa stone, I get a very mirror finish. Then I use the Karasu stone and this mirror finish is replaced by a mist,haze(I believe it is called) finish.
Perhaps I should buy a loup and check the scratch pattern. I do think the Karasu stone has a higher grit than the Naniwa. Perhaps I could skip the 8000 and go
from 800,3000 directly to the Karasu stone.
I am thinking to do this because I read that in natural stones the particles gets smaller as you use it. So maybe my Karasu starts somewhere around 5000 grit and goes to 10.000-15.000 grit. This way I would not need the 8000 stone. Maybe by checking under a loup will give more info.
I don't really need a stone that is in the 20.000+grit
range as I was only looking for a stone that would
would be an improvement over the 8.000 grit Naniwa
stone.
Mainaman and Kingfish, thanks for the info on BKF. I will check it although I am sure it is not called that way here in the Netherlands.
Would cleaning vinegar do the trick without damaging
the diamond stone?