Grit Table / diamond / Sharpal Diamond sharpening plate
Product, maker figures
Sharpal Diamond sharpening plate
Diamond
The maker publishes these figures. A single value per grade, no distribution given, so each is drawn as a point.
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
50 30 20
coarser finer
ink
shape
Extra Coarse 220 Maker-published
Maker states 60 micron for this grade.
spread not published · reference scale about #230
Coarse 325 Maker-published
Maker states 45 micron for this grade.
spread not published · reference scale about #290
Fine 600 Maker-published
Maker states 25 micron for this grade.
spread not published · reference scale about #480
Extra Fine 1000 Maker-published
Maker states 15 micron for this grade.
spread not published · reference scale about #760
Extra Fine 1200 Maker-published
Maker states 12 micron for this grade.
spread not published · reference scale about #950
This is reference, not a recommendation. Particle size is defined by the abrasive grading standards (ISO 8486, ISO 6344, JIS R6001, ANSI B74, FEPA); the full references are listed and linked here . The data is free to use under CC BY 4.0 ; please credit Zen-Wu Toolworks.