Recently, I have gotten back into some leatherwork after
Among other tools, I have several "round knives" (the half
moon shaped knives that you may have seen.)
In any case, I had always sharpened them using Japanese
water stones ending with an 8000 grit gold polishing stone.
The edge I could produce was always very good, but...
A few days ago, I got some .3 Micron lapping film, and
worked the wet edge of my largest round knife with it for
perhaps 30 strokes.
Then, I made a cut in some 10 ounce oak tanned leather.
The tool glided through the leather with far greater ease
than I had ever experienced. It was like using a different
I was truly astounded.
Next, I polished the knife using a strop on which I had some
aluminum oxide abrasive compound, and saw a similar result.
The knife was far sharper than I could achieve using the
And so these questions:
What might be going on here? Is the grit on the 8000 stone
really so much more coarse that I can feel the difference in
the resulting edge so easily? Or is there something else
happening with the few strokes of the strop or .3 Micron
And finally, would there be ways that I could get these
knives sharper still?
Thanks for any thoughts,
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