Thread: J-Nat club

and here is one of many Ozuku from Tenjyou strata that is a lot harder and "finer" then many Namito and Aisa stones i have tried

I have moved my post in order to preserve the beauty of this thread. Alx

Originally Posted by alx

It is a risky statement, in my opinion to claim,
" the main abrasive in Kyoto finishing hones are particles of Silica, ranging from 2-3 microns in size. 2-3. That's the size of the particles in a 4K to 6K artificial stone. ALL of the stones they measured fell between those marks, from a variety of mountains and strata".

I have some trouble with that broad statement, would never say that myself because I can feel the difference between a coarse stone and a smooth stone with my hand. In my book, smooth=fine. But at the same time I do not fault Jim for quoting a study if he feels it is pertinent information to pass on.

Alex,
I am not sure why you have problem with that statement, scientists from Tokyo University conducted research and posted their findings.
If a systematic research is not enough to prove a statement then what is?

Originally Posted by alx

" the main abrasive in Kyoto finishing hones are particles of Silica, ranging from 2-3 microns in size. 2-3. That's the size of the particles in a 4K to 6K artificial stone. ALL of the stones they measured fell between those marks, from a variety of mountains and strata".

The trouble I have with this statement is not its veracity but what it may imply to the inexperienced.
As some of us know the size of a particle can be meaningless without considering it's shape , friability & other factors I may be omitting.
It is great to simplify things but not always so great to generalise. Hardness can be a major factor but again, in the world of naturals there will be variation.

I have decided to move my post to Grit with this purpose to preserve the neutral theme and beauty of this thread. Alx

First year statistics: not finding something does not prove it does not exist.

Applies to samples of course, not to populations.

James.

Here is my incredibly hard ozuku and very big(mizu)asagi:



Here with my good looking guangxi hone:



Enjoy

Sharpman

Yaginoshima Asagi.

Hi,
My first jnat.

Ozuku Kiita that I bought from Maksim (Thanks Max )



I love this stone. I am positive that I will learn how it works soon.

Originally Posted by danielghofrani

Hi,
My first jnat.

Ozuku Kiita that I bought from Maksim (Thanks Max )



I love this stone. I am positive that I will learn how it works soon.

Daniel nice stone indeed, but I am not seeing the kiita(yellow). The picture
looks quite dark, so it might be that. Could you post another picture
with better light?

Good luck with the stone.

Sharpman