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How to get out a dull spot

Fri Feb 01, 2013 10:04 pm

I'm a dummy and was sharpening my gyuto on a whetstone while talking to a friend, so I was pretty distracted. Woke up the next day to use my knife and saw that there was a concave spot on the blade now that doesn't make contact with the cutting board while I'm using it. Any tips on getting this out? Can it be done on my stone? Thanks in advance

Re: How to get out a dull spot

Fri Feb 01, 2013 10:13 pm

Pretty much common sense - you need to remove metal elsewhere to even it out. Got a lot of work to do, but you can do it on stones. Best to use a 150 grit or 220 grit stone or even a diamond plate.

Re: How to get out a dull spot

Sat Feb 02, 2013 6:25 pm

If it's a really bad concavity, "breadknife" the edge back to the original profile. Hold the knife as if you were going to cut the stone in half and gently move it along the stone. You'll probably want to use the side of the stone to do this. Work slowly and check your progress often.

Once you've reestablished the profile of the blade, you'll need to thin it behind the edge and then sharpen it.

Re: How to get out a dull spot

Mon Feb 04, 2013 8:54 am

Yeah, what Rick said.

Another option if you don't want to use your stone is to go buy some 220 grit wet/dry sandpaper and use that to reprofile the edge. Lay it on a flat surface (picture frame glass if your wife isn't looking) and use a sawing motion like you're trying to cut the paper in half.

Depending on how deep you dished the edge, this could take a long time. If it's minor, it won't take but a few minutes though.
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