The 1x6" Naniwa 1K “Chocolate Bar” is one of the best economically priced 1K stones on the market. This stone holds its shape well, cuts rather quickly and leaves an edge that is refined enough for most tasks with a good amount of tooth. Like most other 1K stones, 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.
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:
The Naniwa 1K Chocolate Bar is an economical sharpening stone that works on almost all types of knives, scissors, tools and chisels, including those made with abrasion resistant steels. While the 1x6 size is meant for use with the Jende JIGS for Knives, Edge Pro Apex, Edge Pro Pro, Hapstone Sharpener, and TSProf Sharpeners, it is also a great size for a slip stone, field stone or a pocket stone for knife sharpening on the go, or to remove unwanted burrs.
On More Traditional Carbon Steel and Stainless Steel Edges the Chocolate Bar works on steels between RC 52 and RC 65 on the Rockwell C Hardness scale. The stone will make a very respectable and sturdy basic edge on 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 Chocolate Bar really evens out the surface of these steels, leaving a consistent 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 Chocolate Bar acts similarly to higher hardness carbon and stainless steels, prepping the surface to a consistent finish with a work sharp edge.
Hacks and Tips:
Comparable Stones: King 1K, Sigma 1K Oribest, Suehiro 1K R
Alternative Mid Level Stones: Naniwa 1K Goken Pro
Alternative Premium Level Stones: Jende 1K SF, Jende 1K SPK, Naniwa Chosera 1K, Sigma Select II 1K, Suehiro 1K Cerax