Quote Originally Posted by 0livia View Post
Duh, reminds me to work on that table.

Norton 4000 = F800 or JIS(new) 2000
Norton 8000 = F1200 or JIS(new) 4000
So that's Norton, how about Shapton, made in Japan? Do they use a different (i.e. Japanese) scale?

The reason I am asking is that most of us will do a grit progression when setting a bevel and progress to polishing an edge. We simply look at numbers and automatically presume that a higher number means a finer hone which would be OK if all manufacturers of synthetic hones use the same grit scale.