Has anyone done this? Naguras, coti slurry stones...etc. I read this advice on japanesenaturalstones website as a way to generate slurry quicker as well as keeping it from sticking to the stone. Curious if anyone uses this trick or not. It sounds plausible.
Putting grooves in your slurry stones
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I put two grooves in my tomo with a thin file. Very shallow in case it ended up being destructive so I could lap it out. I lapped lightly after filing the grooves to smooth it out. It seemed to work in speeding up the slurrying and prevented the sticking. I didn't notice any scratches on my JNAT.
This gave me an idea though. Why not sell slurry in powder form? 100 grams of botan, for example, in a little bottle that you can sprinkle on to the stone. That would be cool.
This gave me an idea though. Why not sell slurry in powder form? 100 grams of botan, for example, in a little bottle that you can sprinkle on to the stone. That would be cool.
Most people I know who did this to tomonagura's regretted it. Some went so far as to lap the grooves out (wasting a ton of stone doing so). I'm not sure what they didn't like, but they didn't like it. I never bothered trying it.
You can buy powdered slurry. I don't know about nagura, but I've seen other natural japanese hones powder for sale (Once again, I believe it is used in some stage of sword sharpening). The reason I can see for not doing it with a nagura is that it's a waste of good nagura since it'd probably never be able to be applied as efficiently as just rubbing stones lets us. The alternative I suppose would be to use the dust/scrap from the mines ground into this powder. That isn't feasible because many of the mines used for these stones are closed now, and also I imagine that without any way to confirm the dust is of a useful type/quality (the way they can with stones), it'd find very few people willing to gamble on it.
You can buy powdered slurry. I don't know about nagura, but I've seen other natural japanese hones powder for sale (Once again, I believe it is used in some stage of sword sharpening). The reason I can see for not doing it with a nagura is that it's a waste of good nagura since it'd probably never be able to be applied as efficiently as just rubbing stones lets us. The alternative I suppose would be to use the dust/scrap from the mines ground into this powder. That isn't feasible because many of the mines used for these stones are closed now, and also I imagine that without any way to confirm the dust is of a useful type/quality (the way they can with stones), it'd find very few people willing to gamble on it.
The nagura works 2 ways, it releases slurry and the abrasion of the nagura also releases slurry from the base stone. Plus the naguras also have a nice smoothing and resurfacing effect on the base stone. The only thing Ive done to my naguras is round off a corner slightly with the dmt , I don't use the naguras flat, I always use a rounded corner. Ive heard people using cbn spray on their jnats, interesting idea although I don't see a reason to do it as its not necessary IMO.
My tomo is so small that a groove would make is disappear! ...... but it still works just fine.
I grooved my CNAT slurry stone with good results, as it makes it less "sticky". I'm leaving my coti slurry stones ungrooved though, as they are soft enough to glide nicely.
Cutting grooves in a Tomo or Mikawa Nagura create edges that can chip.
Those chips that can fall off those new edges along the notches will ruin an edge if they get into the slurry.
There are ways to make the groove so it's less prone to chipping, but I still don't think it makes sense to do this.
It's easier to cut a groove than it is to round off one edge, but in the long run - I think rounding makes more sense.
A rounded edge is safer, and it creates slurry as fast or faster than notches allow. It also prevents sticking just as well.
I've notched Nagura in the past, each one cause me grief. Now - I round one surface to slurry with, and I'm inclined to seal the sides also - although I've only sealed a few at this point.
Those chips that can fall off those new edges along the notches will ruin an edge if they get into the slurry.
There are ways to make the groove so it's less prone to chipping, but I still don't think it makes sense to do this.
It's easier to cut a groove than it is to round off one edge, but in the long run - I think rounding makes more sense.
A rounded edge is safer, and it creates slurry as fast or faster than notches allow. It also prevents sticking just as well.
I've notched Nagura in the past, each one cause me grief. Now - I round one surface to slurry with, and I'm inclined to seal the sides also - although I've only sealed a few at this point.
Steve56
Ask me about shaving naked!
They stick less and so are easier to use with grooves. Here's a video from Alex that includes cutting the grooves:
http://youtu.be/oXiRetAncQI
cheers, Steve
http://youtu.be/oXiRetAncQI
cheers, Steve
i have grooved one hard slurry stone (that was much harder than my base stone) with poor results. rounded corners are the way i go now with all my slurry stone except coti's which i leave as is.
I don't put grooves in nagura either. I used to round off one side, now I create a wedge. This works really well and helps move slurry around very easily.
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