Thread: Naniwa cracking

Yep you carnt go wrong with super strones

I had no sign of crazing in my 5k until recently. Since this happened to coincide with wintertime and relatively low humidity in our house, I'm going to start storing at least my higher grit Choseras (2, 3, 5, and 10k) in a humidity chamber.

It can't hurt and it won't be any sort of inconvenience.

Hmm...I dunno. Looking at the humidity here, up north around the Great Lakes, and Japan, I don't see a very wide variance. Im sure it gets a bit lower up that way, but still such a strange phenomenon...

I wonder if there's another environmental factor that could be responsible?

Originally Posted by Marshal

Hmm...I dunno. Looking at the humidity here, up north around the Great Lakes, and Japan, I don't see a very wide variance. Im sure it gets a bit lower up that way, but still such a strange phenomenon...

I wonder if there's another environmental factor that could be responsible?

It is strange. For example I had a full set of superstones for a good while and never had any crazing. Had one of the Japanese Shapton pro 12k with no problems, thought it was a helluva good stone. Sold it to a buddy in Minnesota and it got the crazing.

I've got 1k Chosera for 4 or 5 years, plus the 3k, 5k, 8k, and 10k for at least a couple of years, and only the 5 and the 10 show the crazing. You would think it would be all, or none at all.

On the one hand I don't mind the cosmetic part of the equation, as long as the stones continue to work well, but on the other hand, to think that the crazing may become worse, as in full fledged cracks, and I'll be out a handful of $.

I wonder how much of the problem is caused by the stone trying to bend or warp when it gets wet or when it's drying.

Shapton's glass stones seem to be a good idea (though I don't care for only 5mm of abrasive) with the glass keeping the stone flat. Maybe at the first sign of crazing you epoxy it to a flat piece of glass or polished marble tile? Might be something to try, Shapton made the glass series for a reason.

Cheers, Steve

Just to add a little. I've noticed that my 3k Chosera, which had spiderweb checks before I got it, seems to have filled in the checks with binder material since I've been slow drying it. So now there is a spider web pattern of white on the salmon stone

Just buy a Shapton Pro or glass water hone & no more problem!

Slawmeister