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  1. #1
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    Default Scratches after Lapping Chinese 12K

    I got my DMT D8C and got to work on flattening my hones. The norton 4/8k flattened fine, but when I got to the Chinese 12k, besides taking FOREVER I noticed scratches
    Take a look at the pic and please tell me if this is normal.

    I kept both stones under running water and frequently pulled them apart to remove the slury forming underneath. My motions were consistently up and down 2 minutes, rotate, 2 minutes, rotate, etc..

    I have long ways before I get to using the stone but I want to make sure that I won't need to reflatten the thing.

    The two LONG streaks aren't the scratches. They came with the stone. The swirls are what came out of the lapping.

    Last edited by ProfessorShak; 08-29-2008 at 02:06 AM. Reason: Missing Info

  2. #2
    Senior Member Aquanin's Avatar
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    my DMT does the same thing on that stone. I have used it and it dosnt make a difference. I cannot feel the scratches. But I am pretty new to this so more expet people might need to chime in.

  3. #3
    Senior Member kelbro's Avatar
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    That's odd. I have lapped my CH12K with my DMT8C and it looks great.

    Did you guys do any sort of break in on your DMTs beforehand?

  4. #4
    Senior Member xChris's Avatar
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    Yeah, I've seen this too. I think either you're using too much pressure in lapping, or you've got a "high spot" on the DMT8C. Like already mentioned, it probably won't be a real problem for honing. Try to use a scrap piece to "break in" the hone some more.

  5. #5
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    Quote Originally Posted by xChris View Post
    Yeah, I've seen this too. I think either you're using too much pressure in lapping, or you've got a "high spot" on the DMT8C. Like already mentioned, it probably won't be a real problem for honing. Try to use a scrap piece to "break in" the hone some more.
    I use the stones weight and hold it from the sides just letting it slide. I broke in the dmt with the norton 4/8k, which turned out ok.

  6. #6
    Senior Member xChris's Avatar
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    Maybe the composition of the natural stone makes it more prone to the scratching than the material used in the Norton?

    You could try getting some wet/dry sandpaper (400 - 1000 grit) to remove the scratches. I suppose you could wrap the sandpaper around the DTM8C for a flat surface (if you don't have something else).

  7. #7
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    The scratches won't harm you blades in any way.

    It ought to go away once the DMT is a little more broken in, one or two lappings doesn't really do it.

  8. #8
    Senior Member sebell's Avatar
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    I experienced this when lapping my Belgian stones with the DMT8C. The DMT can
    take a while to break in, and lapping natural stones is probably not going to do it.
    You could use a chisel or old razor on the DMT (light tough, don't dig in!), or lap
    something harder like a ceramic or barber hone.

    It can be frustrating to see these kinds of results initially...

    - Scott

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