ragman wrote:I'm not sure I'm reading & interpolating this chart correctly, perhaps someone with more experience can help. Does this chart identify the Shapton 1000 grit/micron between an interpolated 700-800 Chosera stone? Is the Shapton 4000 grit/micron just slightly less than a Chosera 3000 stone and the 6000 Shapton slightly less than the 5000 Chosera?
One difficult to measure metric is the distance between the tips of grit
as they present themselves to steel. I have never seen anyone address
this with the exception of some scratch pattern folk.
Tiny grit can be packed shoulder to shoulder or dispersed two or three
or more grit diameters apart in the matrix. A very dense hone can
thus cut 'finer' than the grit diameter might indicate.
Back to scratch, there is distance between scratches and depth of the scratches.
The maximum depth is mostly a force thing so doubling the number of grains
per square unit reduces the force per grit point by about four. So a denser
hone formula can have more and shallower scratches when used the same way.
Grit dimension is important with a slurry. The grit tumbles on the matrix of
the hone in contrast to just peaking up and depending on dilution and wear of the
grit cuts differently.
And thanks for the charts. Good stuff.