practice is the best teacher--find some knifemakers & ask them for visits to their shops. maybe watching their operations you can see what prefects sharp edges. as to the sharpest edge find a friend at cal poly tech--possibly the best u.s. engineering institution & make enquiries. other contributors in some forums still say the diamond knife is the sharpest edge in the world. very possibly the answers you seek are not in this area of information.--cranky72
