Originally Posted by
BanjoTom
I was taught that a Jnat MUST have a mirror finish prior to using it for finishing a razor. It is pretty easy to accomplish and makes the final finish process a dream. You can see if the rock is ready if it reflects at approximately a 10° angle. I was told that a Jnat is not ready for final finishing unless that angle produces a reflection. I have successfully followed this advice with my Shoubudani Aisa, polishing it with a nagura.
I am no expert on this. Other site members can more than fill in this humble information here written by me. But this works so splendly, I had to share it.:bow