Budget synthetic waterstones (Chinese)

Waterstone

No particle size in microns is published for this line. The values are our estimates from secondary sources, so the marks are faded and the spread is unknown.

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.

Particle sizemicrons, log

50302010532

coarserfiner

inkmeasured or standardmaker figureour estimate

shapeknown distributionpoint, spread unknown

#240Our estimate

57 µm

C-estimated from JIS (#240 = 54 to 60).

spread not published · reference scale about #240

#400Our estimate

30 µm

C-estimated from JIS (#400 = 28 to 32).

spread not published · reference scale about #400

#1000Our estimate

11.5 µm

C-estimated from JIS (#1000 = 10.5 to 12.5).

spread not published · reference scale about #1000

#3000Our estimate

4 µm

C-estimated from JIS (#3000 = 3.5 to 4.5).

spread not published · reference scale about #3000

#6000Our estimate

2 µm

C-estimated from JIS (#6000 = 1.6 to 2.4).

spread not published · reference scale about #6000