400 grit sandpaper made knife dull?

A

american21

Joined
Sep 29, 2013
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Is it possible put wet dry 400 grit around my shark maker stones was getting kind of sharp with the medium stones then I took a step backwards and decided I wanted it sharper and used sandpaper maybe 60 strokes zip tied on the stones with a bn benchmade mini grip 154cm
 
I think a pic & try to rephrase your question, we - eager sharpknuts - would jump in.
 
Assuming that 'Shark Marker' stone has a hard surface. If you leave too much dust (broken abrasives) on SiC w/d, probably some sort of burr got created. AlO w/d is less problematic than SiC. However if the backing is soft and or w/d surface is crumly/loose, the edge could be rounded. My suggestion is wrap w/d around the stone or some hard surface or wet it and stick it on glass or granite surface. Use gentle edge-trailing strokes and clean the sand paper surface often.
 
Spyderco sharpmaker I meant so with sandpaper your not supposed to cut from too to bottom like usual but go the opposite direction?
 
american21 said:
Spyderco sharpmaker I meant so with sandpaper your not supposed to cut from too to bottom like usual but go the opposite direction?
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Yes but won't end well because of odd movement, unless you're freehanding it. Maybe use 1500 grit w/d + flat part of the rod, then use normal top-to-bottom (edge leading) stroke.
 
bluntcut said:
Assuming that 'Shark Marker' stone has a hard surface. If you leave too much dust (broken abrasives) on SiC w/d, probably some sort of burr got created. AlO w/d is less problematic than SiC. However if the backing is soft and or w/d surface is crumly/loose, the edge could be rounded. My suggestion is wrap w/d around the stone or some hard surface or wet it and stick it on glass or granite surface. Use gentle edge-trailing strokes and clean the sand paper surface often.
Click to expand...

Good advice; that's how I've preferred to use sandpaper with my knives. :thumbup:

Edge-leading can work, but one has to be very, very careful to keep pressure extremely light, and the angle consistent. Both of these things will minimize how much the paper will conform/compress under the blade edge, and also minimize scrubbing abrasive off the paper, which will tend to dull the edge. In my own habits, pressure is the most challenging to regulate. I've always tried to constantly remind myself that no matter how light I think I'm keeping it, it should probably be lighter. Results are always better that way. :)


David
 
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