Dans Whetstone

Oilstone

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

1053

coarserfiner

inkmeasured or standardmaker figureour estimate

shapeknown distributionpoint, spread unknown

Dan's Soft ArkansasOur estimate

12 µm

Range 10 to 14 µm. Dan's grade: Medium, specific gravity 2.20-2.30, 'Related Grit Size' 600-800.

spread 10 to 14 µm · reference scale about #950

Dan's Hard ArkansasOur estimate

10.5 µm

Range 9 to 12 µm. Dan's grade: Fine, specific gravity 2.30-2.45, 'Related Grit Size' 800-1000.

spread 9 to 12 µm · reference scale about #1100

Dan's True Hard ArkansasOur estimate

6 µm

Range 5 to 8 µm. Dan's grade: Extra Fine, specific gravity 2.50+, 'Related Grit Size' 1200+.

spread 5 to 8 µm · reference scale about #2200

Dan's Translucent ArkansasOur estimate

5.5 µm

Range 4 to 7 µm. Color classification inside Dan's True Hard grade (specific gravity 2.50+); Dan's states color is not the determining factor, density is.

spread 4 to 7 µm · reference scale about #2350

Dan's Black Hard ArkansasOur estimate

4.5 µm

Range 3 to 6 µm. Color classification inside Dan's True Hard grade (specific gravity 2.50+); Dan's term is 'Black Hard', not 'Surgical Black'.

spread 3 to 6 µm · reference scale about #2750