Originally Posted by
Scipio
Glen once said something along the lines that a 1K provides 90% of an edge, a 4K or so another 5%, the 8K another 4% and then a 12K+ the remaining few % with the exception of small decimals for increments such as the 16 or 30Ks etc. YMMV and all steel is different, but you can appreciate the general picture. I certainly agree.
So the difference between a 12K and a 30K in terms of sharpness once the bevel is properly set, is fairly minimal...it is certainly not over double as one may be inclined to think