A nagura is a small conditioning stone used to raise a slurry on the surface of a larger sharpening stone. Rubbing it across the stone releases fine abrasive particles that mix with water to improve cutting speed, refresh the stone surface, and produce a smoother, more consistent finish on the edge. The Irodori line from Naniwa is the most practically useful nagura range available: each stone is manufactured to a specific stated grit, which means you can match the nagura to the stone you are working on and produce a slurry of known particle size. Coarser grits break the surface faster and generate slurry quickly; finer grits are used for polishing and refinement on finishing stones. Each Irodori stone measures 60mm x 30mm x 20mm - compact enough to store with the stone it accompanies. Made in Japan.
The 10K Irodori is for use on ultra-fine finishing stones - the Naniwa Super Stone 10K, Shapton GlassStone 10K, and similar high-grit polishing stones - where maintaining a consistent, ultra-fine slurry is the difference between a polished edge and a scratched one. At this grit level even a small difference in particle size is perceptible on the edge. The matched 10K slurry keeps the finishing stone from glazing while ensuring the abrasive particles in the slurry are no coarser than the stone itself.
Care Instructions: Splash both the nagura and the sharpening stone with water before use. Rub the nagura gently across the stone surface to raise slurry, then sharpen as normal. Rinse after use and allow to air dry completely. Do not soak. Store in a dry location away from freezing temperatures.
The 10K Irodori is for use on ultra-fine finishing stones - the Naniwa Super Stone 10K, Shapton GlassStone 10K, and similar high-grit polishing stones - where maintaining a consistent, ultra-fine slurry is the difference between a polished edge and a scratched one. At this grit level even a small difference in particle size is perceptible on the edge. The matched 10K slurry keeps the finishing stone from glazing while ensuring the abrasive particles in the slurry are no coarser than the stone itself.
Care Instructions: Splash both the nagura and the sharpening stone with water before use. Rub the nagura gently across the stone surface to raise slurry, then sharpen as normal. Rinse after use and allow to air dry completely. Do not soak. Store in a dry location away from freezing temperatures.
- Brand: Naniwa
- Line: Irodori
- Grit: 10,000
- Dimensions: 60mm x 30mm x 20mm
- Origin: Japan
