Quote Originally Posted by mparker762 View Post
Dr. John Verhoeven, Distinguished Emeritus Professor, Materials Science and Engineering, Iowa State University

Experiments on Knife Sharpening

He examined the sharpening process using a variety of hones, examining the result under an electron microscope at up to 10,000x magnification. This allowed him to measure the width of the cutting edge to 0.01 micron. The paper at the link includes photos at up to 3,000x. If you haven't read it yet I encourage you to do so, there are some surprising results in there, backed up by photos from the electron microscope, like the width of these edges stopped improving at a surprisingly low grit
Way the second ?what you say? stopped improving? do you mean edges doesn't get any narrower?if that is what you mean sorry i am disagree
, and there were no teeth on the edge past I believe about 2000 grit.
i can see clear tooth after norton 4k.

I agree the cutting efficiency improves as you go up in grit. But the edge doesn't get any narrower past about 4k - something else is improving the cutting efficiency.
What else will improve cutting efficiency? cutting edge gets narrower and sharper as you go up to the grit's.
Some people may call it differently but that is the way sharpness increase.
Simple example you can get maximum edge from particular stone. Example if you get maximum sharpness from Ecsher after 100 strokes. you will not get any sharper even you make 100000 more strokes after 100 strokes?
You know why ? edge gets narrower as mush as escher can do (particular stone maximum ability) after that using escher is nonsense . if you want to get more sharper you have to use another brand better final edge putting stone .
This is what i have experienced .