The 1x6" Naniwa 1K Goken Pro stone is medium stone used for edge profiling, repairs, initial maintenance and for leaving one of the better 1K working sharp finishes out This stone also cleans up deeper factory scratches, makes transitioning from diamond plates and stones easier and cleaner, and is a good foundation stone before progressing to finer grits. One of the key features of this stone is that sets the stage to be followed by natural stone progressions or synthetic stone progressions.
Mounted to a blank and 1" x 6" x 5mm in size, this stone is used with water only and work best when soaked in water for a minute or two or until any bubbles stop before use. Store in a dry place in between use.
Abrasive Material: Aluminum Oxide
Ideal place in a sharpening progression:
On More Traditional Carbon Steel and Stainless Steel Edges the Goken Pro works on steels between RC 52 and RC 65 on the Rockwell C Hardness scale. The stone is softer and quicker than other Naniwa stones, and will make a very respectable and consistent matte finish with an edge that can shave hairs on the softer end of the spectrum of steels like X50CrMoV15, AUS6, 440B, and most steels used by many kitchen knife makers like Henckels, Wüsthof, Gunter Wilhelm, F Dick, Victorinox, etc.
On the higher end of the hardness spectrum of traditional steel edges made with steels like 1095, 52100, 440C, Aogami White, Shirogami Blue, O1, W1, etc. The 1K Goken Pro really evens out the surface of these steels, leaving a beautiful matte finish and very functional working sharp edge. The softer matrix of the stone is ideal for these harder steels.
On Carbide Forming Steel and More Abrasion Resistant Steel Edges such as VG-10, D2, M2, S35V, S90V, etc. The 1K Goken Pro stone acts similarly to higher hardness carbon and stainless steels, prepping the surface to a matte finish with a work sharp edge.
Hacks and Tips:
This stone creates a paste very quickly that will finish the edge with a slightly higher grit than advertised, so no slurry is generally needed.
This stone is a little thirsty, so be sure to keep the surface wet with water when sharpening to avoid the black swarf from turning into a thick paste. This stone really likes a little paste on its surface to add a little horsepower and finer grit finish. Keep the stone wet enough with drops of water or a fine spray mist to allow the paste to be viscous, but not dry or too runny.
Because of the fast cutting speed, this stone will require more frequent maintenance to keep it flat and even over time. Lap this stone with a coarse or extra coarse diamond plate, silicon carbide (SiC) powder, or low grit wet dry sand paper to keep it consistently flat and clean.
Comparable stones by grit:
Naniwa Chosera 800, Jende 1K SF, Jende 1K SPK, King 1K, Naniwa 1K Chocolate Bar, Naniwa Chosera 1K, Shapton 1K, Sigma 1K B, Sigma 1K Oribest, Sigma Ceramic 1K Hard, Sigma 1K Soft, Sigma Select II 1K, Suehiro 1K R, Suehiro Cerax 1K, Sigma Select II 1,200