Diamond paste and spray

Micron-graded diamond compound

Diamond paste and spray are graded directly in microns by the industry (Kemet, Engis, and others). Maker figures (hollow), no distribution published, so each is 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 sizemicrons, log

1005030201053210.50.3

coarserfiner

inkmeasured or standardmaker figureour estimate

shapeknown distributionpoint, spread unknown

90 micronMaker-published

90 µm

Coarsest common paste grade (Kemet, Eternal Tools).

spread not published · reference scale about #160

45 micronMaker-published

45 µm

spread not published · reference scale about #290

15 micronMaker-published

15 µm

spread not published · reference scale about #760

6 micronMaker-published

6 µm

Grit equivalence disputed: DMT 4000 mesh, Eternal Tools 5000, Kemet ~3000.

spread not published · reference scale about #2200

3 micronMaker-published

3 µm

Commonly tied to ~8000 mesh.

spread not published · reference scale about #4000

1 micronMaker-published

1 µm

Commonly tied to ~14000-16000 mesh; mapping is approximate above ~8000.

spread not published · reference scale about #8850

0.5 micronMaker-published

0.5 µm

Grit equivalence 30000-50000 mesh depending on vendor; treat as approximate.

spread not published · reference scale about #13050

0.25 micronMaker-published

0.25 µm

Grit equivalence 60000-100000 mesh by vendor; approximate.

spread not published · reference scale about #19500

0.1 micronMaker-published

0.1 µm

Finest standard grade found (Kemet, Engis, KME, UKAM).

spread not published · reference scale about #31500