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Grit Table / waterstones / King (Matsunaga)
Product, no maker data
King (Matsunaga)
Waterstone line
King (Matsunaga) publishes no particle size. These are grit-chart estimates keyed to the printed number , not maker data. Faded.
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 size microns, log
20 10 5 3 2
coarser finer
ink
shape
#800 Our estimate
C-estimated.
spread not published · reference scale about #600
#1000 Our estimate
C-estimated.
spread not published · reference scale about #720
#1200 Our estimate
C-estimated.
spread not published · reference scale about #870
#4000 Our estimate
C-estimated.
spread not published · reference scale about #2750
#8000 Our estimate
C-estimated.
spread not published · reference scale about #6000
This is reference, not a recommendation. Particle size is defined by the abrasive grading standards (ISO 8486, ISO 6344, JIS R6001, ANSI B74, FEPA); fuller references in the project REFERENCES.