is S90V REALLY harder than the sharpmaker rods??

Just to add the mix, I recall reading a post which said regular old carborundum stones will work with S90V too. I haven't tried it yet.

Have any of you used carborundum on S90V?
 
I have been carrying an S90V Military for months, and I have touched it up twice on the Spyderco Sharpmaker. Once after cutting through a bulk sandblasting hose (and hit the 2b size stone underneath) and once after loaning it out for an "annonymous" cutting task at dinner out with friends. No trouble at all to report.

Now if I could only get my hands on a 125V Military that Sal mentioned...
 
Our white stones sre 9.2 on the Moh's scale. A diamnond is 10.0

Technically, they're synthetic sapphires.

sal
 
Adding pigment is challenging. The stones are fired at 3200 degrees F. for 3+ days. Carbon is the only pigment we can add that doesn't burn off in firing.

sal
 
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