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After seeing this post (http://straightrazorpalace.com/basic-honing/41048-anyone-have-experience-shapton-200-000-grit-stone.html) in the basic honing section, I have revised the list a bit to remove...

I think it would be great to know where a bunch of them fit in, but to tell you the truth, I doubt they would ever make it into this list....Since none of those old barber hones are being made...

JimR - I can't tell you how much I appreciate you posting that sheet!

That not only confirms the JIS variance information, but it also tells us that all Naniwa Stones and powders will rate those...

http://straightrazorpalace.com/advanced-honing-topics/39634-life-edge-what-same-what-different.html

Pages 5 and 6 mention the same hones and might have some info you don't have on the Frictionite...

I first started this spreadsheet as a result of seeing an earlier version of that list, I even borrowed the formatting from it, but you will notice that not all of the information on that page...

After spending more time digesting this (JIS grit table for Japanese water stones in microns (electrical resistance method)) chart you posted.....

That is quite some variance! With variance...

The JIS information in this list did originally come from your page first!

I have since referenced most of the information from http://www.metallographiebedarf.de/download/korngroesse_fepa.pdf...

Glenn - I completely understand your skepticism, I felt the same way at first, but after working on this for quite a while and trying comparisons of things like US to European sand paper and Norton...

I had a friend that speaks Japanese call them at 0285-72-7755 after I had the Glass stone info from their web site.

Since this was word of mouth and not a written and published table, I would be...

Absolutely perfect!

I intend to post it on a couple other forums as well.....I have seen lots of partial comparisons, but I have never seen any references to back them up, and I just don't trust...

I have spent a fair few years trying to compile a list of grit comparisons for my own uses: shaping, smoothing and polishing rocks, metals, plastics and wood; and sharpening everything from milling...