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 Post subject: Scratches in high grit stones
PostPosted: Wed Jul 31, 2013 10:28 pm 

Joined: Tue Jun 04, 2013 4:59 pm
Posts: 199
So I haven't sharpened in a while and my stones are completely dry which I didn't notice but apparently I sharpen often enough to where this doesn't happen. I notice that my higher grit stones, 3k and up, have scratches from the lapping plate, which I would imagine doesn't promote good sharpening. Should I use my lower grit stones to flatten with and then reflatten them with the lapping plate? It is only an XC dmt plate rather than an XXC, is this not a very big deal cause I am thinking why flatten if it puts decent scratches in my stones? What do you guys think or do in this situation? Thanks in advance for any responses.


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 Post subject: Re: Scratches in high grit stones
PostPosted: Wed Jul 31, 2013 10:34 pm 

Joined: Tue May 29, 2012 12:29 am
Posts: 890
It will not effect sharpening hut will effect the feedback/feel you receive while sharpening.

A nagura stone or some fine wet/dry sandpaper will smooth out a high grit stone after lapping, FYI.


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 Post subject: Re: Scratches in high grit stones
PostPosted: Wed Jul 31, 2013 11:06 pm 

Joined: Tue Jun 04, 2013 4:59 pm
Posts: 199
Sounds good, I have a synthetic nagura that came with my choseras. Glad to get some advice from a member I respect, that seems to happen a lot on this forum.


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 Post subject: Re: Scratches in high grit stones
PostPosted: Thu Aug 01, 2013 6:57 am 

Joined: Tue May 29, 2012 12:29 am
Posts: 890
Make sure you soak that nagura first, it needs it. Don't make a slurry with it either, its about 1k and will put a bit of that in a slurry which can mess up a high grit finish. (Things you may already know but worth saying)

With some stones the chosera nagura will put its own scratches in the surface but not nearly as deep as a DMT XXC.


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 Post subject: Re: Scratches in high grit stones
PostPosted: Thu Aug 01, 2013 3:51 pm 
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Joined: Fri Mar 29, 2013 5:46 pm
Posts: 217
Synthetic naguras are basically chalk, and are usually softer than the stones you're trying to lap. They usually won't do much in the way of actually taking scratch out, but will do something in terms of filling the scratches. Similarly, they get mud going by depositing nagura mud rather than raising stone mud. Neither of those things is horrible, because they're effective.

Nevertheless, rubbing two stones together works better for me.

BDL


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 Post subject: Re: Scratches in high grit stones
PostPosted: Thu Aug 01, 2013 5:52 pm 
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Ditto to BDL....I prefer to rub two stone's together to get out DMT plate scratches.

However, I don't do it all that often and just live with the scratches as they don't seem to affect the outcome much if at all.



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 Post subject: Re: Scratches in high grit stones
PostPosted: Thu Aug 01, 2013 9:56 pm 

Joined: Tue Jun 04, 2013 4:59 pm
Posts: 199
This is all great info and much of it is news to me. I tried the nagura stone and it worked great but I want to flatten my 1k and then use it to flatten my higher grit stones and reflatten it.


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 Post subject: Re: Scratches in high grit stones
PostPosted: Fri Aug 02, 2013 1:09 am 
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Joined: Thu Apr 19, 2012 7:18 pm
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Location: Madison Wisconsin
I ignore the scratches. Scratches on the stones don't transfer to the edge.



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 Post subject: Re: Scratches in high grit stones
PostPosted: Fri Aug 02, 2013 3:43 am 

Joined: Fri Mar 22, 2013 12:44 am
Posts: 161
Location: Northern Virginia
+1 Mark's comment.


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 Post subject: Re: Scratches in high grit stones
PostPosted: Sat Aug 03, 2013 3:32 am 
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Joined: Fri Mar 29, 2013 5:46 pm
Posts: 217
Flatten with diamond. Don't worry about the scratches, and while you're not worrying about the scratches rub your stones together to generate some mud. Your sharpening will go much faster.

BDL


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