Thread: JNAT help

Originally Posted by DaveW

I think the nagura is pulling all particles from the surface of the stone and not just iron oxide particles. I don't know what the composition of the stone is itself, but most stones that have a significant amount of iron oxide are reddish or rust colored (you probably already know that).

If you get a clear bright finish with it, I'd call it good, just not good as a nagura plate where you want the stone to shed nothing. It would seem that a pricey nagura with it is a bit redundant, because the stone is happy to give you what you'd get from tomo, and at least the slurry blackens wheras a very cheap stone would slurry too fast for any slurry to blacken.

His Koma may be harder than the base stone and yet the base stone can be just fine with a softer nagura. Koma vary in hardness and some can be very hard.

Originally Posted by mainaman

His Koma may be harder than the base stone and yet the base stone can be just fine with a softer nagura. Koma vary in hardness and some can be very hard.

That is what I think, too. If the stone is fine, then no problem, just maybe not with that nagura.

I don't have any asano stamped nagura and don't know what they are like. I think soft nagura are nice, but soft and small particles is sometimes hard to find. In my unstamped naguras, the hardness of them is all over the place, some are very hard and only shed their particles to a very hard stone.

Thanks for all replies! Evaluating the shaving edge seems like a resonable approach Its been a while since i used the stone for a complete hone session. I'll do that and report the results.

Definitely the base stone is giving up more slurry than the nagura in this case. This is almost certainly because the nagura is harder than the base stone. As already noted, this definitely does not mean the stone isn't suitable for razor use. Just means you need to use a softer nagura or even maybe try a slurry raised with a diamond plate.

I have a couple asano stamped nagura - a mejiro and a koma. The koma is hard as heck and I have only one or two JNats that it's usable with unless I only want base stone slurry.