Grand Unified Grit Chart

[trancher]

Does anyone know how many microns the Naniwa Super Stone 12,000 and Arashiyama 6K are? I didn't see them on the chart. I have looked all over the internet and I am guessing about 1.2 and 2. I am trying to keep track of various things I have sharpened to learn more but the various grit standards are confusing so I am trying to convert them to microns as best I can to see if that helps. Thanks!

https://www.chefknivestogo.com/na12grsu.html
https://www.chefknivestogo.com/takenoko8000.html

I was curious about this, too. So, I shot Naniwa an email. Their response is what follows.

Thank you for the inquiry.
The size in micron of the S2-491 is 1~2μm.

Best Regards,
Naniwa Abrasive Mfg. Co., Ltd.

After spending about 20 minutes looking for a manufacturers website for the Arashiyama, I threw in the towel on that one.... for now... most likely until laundry day at least.

[Jeff B]

....After spending about 20 minutes looking for a manufacturers website for the Arashiyama, I threw in the towel on that one.... for now... most likely until laundry day at least.

I'm under the impression it's one of the many brands made by Imanishi but not 100% sure. Shoot Mark an email and see if he will say who makes it.