Thread: Nakayama Maruka

Originally Posted by mainaman

There is no grit level, naturals do not have nice round particles like synthetics do.

Knowing the composition does not provide insight of hardness,speed, refinement. It is well known what makes those stones, that is about it. There is a general knowledge of what properties certain mines posses but that is all.

Lots of that has been discussed in various threads on the forum, if you like do a search and read on the subject.

Almost every place that lists Jnats by some very knowledgeable folks list stones with levels for HArdness, Grit/Fineness, particle size cutting speed etc etc. This must be based on something I can only presume, granted we are not talking of round even sizes man made stones.

Originally Posted by sstomcat

Almost every place that lists Jnats by some very knowledgeable folks list stones with levels for HArdness, Grit/Fineness, particle size cutting speed etc etc. This must be based on something I can only presume, granted we are not talking of round even sizes man made stones.

I have always assumed that it works like this:
The seller acquires his stones from Japan or where ever. He/She having knowledge of these stones, tests them and decides , this one is about a 4 and this one is very hard its a definite 5+ and so on.. So I don't think its a scientific process .

Probably you are right, Job. Cheers.

Originally Posted by JOB15

I have always assumed that it works like this:
The seller acquires his stones from Japan or where ever. He/She having knowledge of these stones, tests them and decides , this one is about a 4 and this one is very hard its a definite 5+ and so on.. So I don't think its a scientific process .

Spot on! About the same way certain grit sizes are attributed on SRP to Eschers, coticules and barber hones. We use the stone a couple of times and guesstimate

I realised my first DMT attempt today had fractured the blade edge. Maybe a foil edge.
So I dragged it on the corner of the stone.
Got out my worn Atoma 1200 . I figured it was useless because its worn in the middle.

Raising a slurry I realised that the lighter blue/grey part of my wacky Naky produces white slurry. The darker blue/black part produces dark brown slurry.
The dark slurry takes over the white when they mix.

Anyway I did 4 dilutions and it appears to be a killer edge but I wont know until I shave in a few days.
I hope the edge works well



Edit:What would happen if I used a diamond plate on a diamond plate? Would the world end?