Thread: J-Nat evaluation by KC Crew

Scope:
To evaluate the effectiveness of using Japanese natural hone stones from bevel set progression to final finish.

Method:
For testing purposes, three different razors were honed by three different persons. All stones were lapped and edges chamfered on a DMT 325 plate. To eliminate chance of cross contamination, all slurries were raised by using a DMT 1200 plate.

Results:
qFirst stone pictured is an Amakusa natural stone approximate grit range 1500 to 2000. Bevel set was achieved on each razor by using the normal method of sharpening via circles, x-pattern and full straight pass strokes. No evidence of micro-chipping or abnormal fatigue on any of the razors edge was observed under magnification.

qSecond stone pictured is a Tsushima natural stone approximate grit range 5500 to 6500. Razors edge was further refined in the normal use of honing motions of circles, x-patterns and full straight passes. Visual inspection of the various blades under magnification indicated the razors edges to be uniform and consistent with a 6000 grit stone.

qThird stone pictured is a Shoubudani Kiita (yellow stone) approximate grit range 8500 to 10000. All three razors honed on this stone achieved shave capability by making standard x patterns and full straight pass motions. Visual inspection and edge cutting ability on hair indicates all three razors edge progression is accomplished.

Conclusion:
Positive results with bevel set and progression to shave readiness completed. Further edge refining and polishing was done on each of the test razors using a combination of natural finishing stones. This test was conducted to help better understand the capabilities of using only natural stones as an “alternative” approach to properly hone a razors edge.

Natural stones exhibit inherent variations that can not be predicted. Grit ranges of Japanese naturals are in approximations due to the break down of particulate size during the honing process. This test does not detract from using synthetic stones nor does it promote the belief that one way is more effective than the other. Have fun.
Mike