1x4 Naniwa Chosera 1K Grit
1x4 Naniwa Chosera Stones for the KME Sharpener
The 1x4 Naniwa Chosera 1K Grit stone is one of the most versatile and essential stones on the market. It is a keystone grit used for initial maintenance and light repairs on your edges, as well as for lighter profiling. It leaves a standard and functional work sharp edge that is acceptable for almost any knife or tool. 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.
This stone is 1" x 4" in size mounted to an aluminum blank with a total thickness of 5-6mm and used with water only. It works best when soaked in water for a minute or two before use. Let air dry and store dry when not in use.
Abrasive: Aluminum Oxide
Ideal place in a sharpening progression:
- Starting grit for following a factory angle edge and for lighter profiling.
- Starting grit for light repair and maintenance of an already sharpened but dull edge.
- After any diamond grit plate or stone to remove the deeper diamond scratches.
- After lower grit sharpening stones (120, 220, 320, 400, 600, 800 grit)
- After coarse belt grinder grits (60, 80, 100, 120, 220 grit)
- Before progressing to a finer and/or upper medium grit stone (1,200 - 6K grit)
- A final stone for basic sharpness on many knives and tools.
The Naniwa Chosera 1K sharpening stone works on almost all types of knives, scissors, tools and chisels, including those made with abrasion resistant steels. While the 1x4 size is meant for use with the KME Sharpener, it is also a great size for a slip stone, field stone or a pocket stone for knife repairs and sharpening on the go.
This stone can also be used in a mix and match progression with other synthetic and natural sharpening stones as well as with other brands, such as Shapton, Sigma, Suehiro, Imanishi, Spyderco, King, etc. Naniwa Choseras are Waterstones but can be used in conjunction with oil stones (such as Norton India and other carborundum and Arkansas stones) if the blade is wiped clean before and after switching stone types.
On More Traditional Carbon Steel and Stainless Steel Edges, the 1K Chosera stone works on steels between RC 52 and RC 65 on the Rockwell C Hardness scale. On softer end steels such as X50CrMoV15, AUS6, 440B, and most stainless steels used by many kitchen knife makers like Henckels, Wüsthof, Gunter Wilhelm, F Dick, Victorinox, etc., this stone easily maintains and sharpens, leaving a respectable working edge, especially for kitchen use.
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 Chosera 1K removes surface rust, reestablishes the bevel and edges and leaves a working sharp edge that is ready for use or more refinement.
On Carbide Forming Steel and More Abrasion Resistant Steel Edges such as VG-10, D2, M2, S35V, S90V, etc., The 1K Chosera stone still removes matrix steel and carbides while removing and cleaning up diamond plate or belt sander scratches. Depending on the specific steel type, it may be a little slower going to get the deeper scratches out if there wasn’t a coarser grit stone preceding the 1K. The 1K is essential in prepping these kinds of steel for finer finishes and polishes. The 1K edge on these steels is aggressive, yet refined enough to be used as is, or to be further refined with stropping or finer grits stones.
Hacks and Tips:
- For a more aggressive stone, create a slurry by rubbing the stone’s surface with a smaller 1K Chosera stone, or a coarse or extra coarse diamond plate and some water. The slurry will be creamy green.
- Use a moderate amount of water when sharpening with this stone to avoid the black swarf from turning into a thick paste. A cleaner surface will cut faster than a thicker pasted one.
- If using this stone as a final grit, keep the black swarf viscous and it will produce a slightly more refined edge.
- 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: Shapton 1K, Sigma Select II 1K, Suehiro 1K Cerax
Alternative Economic Level Stones: King 1K, Naniwa 1K Chocolate Bar, Sigma 1K Oribest, Suehiro 1K R