Thread: Big trouble with Naniwa Superstones 10000 and 12000

Originally Posted by eod7

If it were one stone, I'd say bad stone. But if you have two different fine grits doing the same thing, it's probably something else. What are the chances you got two bad stones from two different batches?

That's why I have not sent them back yet. I still think, that I might have done something wrong. But running out of ideas, I'm looking for help

When you hone do you go edge leading only or do you do backstrokes too?
If you do a lot of backstrokes you can get a wire edge and if it falls of when honing it can really mess things up.

Originally Posted by Lemur

When you hone do you go edge leading only or do you do backstrokes too?
If you do a lot of backstrokes you can get a wire edge and if it falls of when honing it can really mess things up.

I do only edge forward. Between Image #1 and #2 of the OP, there is only something like three to five very light x-strokes between them.

It's really puzzling!

More pictures/videos might help someone spotting the problem.

The smooth side of a glass bottle rubbed on the hone may tell it there is something stuck in it.

Try rubbing them together face to face and look for scratches on the hones?

This looks like a pressure problem to me. Go back to 1000 grit and create a chip free bevel. Then progress to the 12k using very light pressure and the results should be fine.

Been following... And all that's been done is very interesting. I don't want this to sound like I'm being a smart a.., but how does the razor shave? I know there's a scratch and a chip that you need a glass to see, but if it shaves ok... It might be time to give it a rest.
I'm far from knowing what I'm doing with straights, but i don't have a glass as part of design. It would just trouble me to much if I were to look at each blade that way.

I agree with tbs that we can only guess from our computers but even at 8k I see big scratches in your bevels. I believe you have 8oo grit scratches still present that are chipping as you thin & polish to 12k. Pressure, poor steel,faulty stones & excess honing can all be a factors but you may be able to eliminate the problem I describe with more time on 3k or even by adding a 1k to the progression. If you are pressing too hard & crumbling the steel or the stones that is also easily remedied by lightening up. Again we can't guess how much pressure you use.

An additional testing approach is to use the higher grit stones at a very different angle to the heavy scratches you're getting to be sure that the scratches are coming from the higher grit stones and not simply being revealed by them.

Originally Posted by rjezuit

Try rubbing them together face to face and look for scratches on the hones?

No scratches, I rub them together all the time.