Sharpening Stage	Grit Range (µ)	Micron (µ)	Kuroma (ku)	Range Code
Shaping 30.1–150		122.5	120	1
	30.1–150	66.82	220
		45.94	320
Grinding 10.1–30	20.1–30	29.4		2A
		25
	15.1–20	20		2B
	10.1–15	14.7	1000	2C
		11.5
Honing 3.01	8.01-10	9.8	1500	3A
	6.01	7.35	2000	3B
		6.7
	3.01-6	4.9		3C
		4
		3.68
Polishing 0.25-3	1.51-3	3		4A
		2.94	5000
		2.45
		2
		1.84	8000
	0.76-1.5	1.47		4B
		1.2
		1	12000
		0.92
		0.85
	0.25-0.75	0.49	30000	4C
		0.44