Grit Table / waterstones / Naniwa Chosera
Product, no maker data
Waterstone line (Professional)
Naniwa publishes no particle size for Chosera. The microns here are our estimates from community and retailer figures, which lean on the grit number itself, so the marks are faded and should not be read as measured. The distribution is unknown. This is the common case for a waterstone: a number you can buy, and usually little measured data behind it.
Each grade below shows its size in microns, its spread (the published distribution, where a maker or standard gives one; most makers publish none), and where that size lands on the reference scale, a shared yardstick for reading grit numbers across makers.
C-estimated.
C-estimated.
C-estimated.
C-estimated.
C-estimated.