Thread: Stone ID?

Looks sort of like a stone that used oil to me. Would flatten it and take pics of the slurry

Thanks Peter. I don't think that it is a sticker. But, I can't really be sure. Seems more like it transferred from something it sat up against or bumped into.

Thanks Christian1. I may not get to that tonight, but I will work on that. I suppose it is best to scrape it for a while and then get a new piece of sandpaper so I make sure I am getting the stone and not some sort of dirt/grime on top of it.

Does look a little greasy. The size does indicate Thuri and if Peter says Thuri you could not get a better qualification. Nice find!

Originally Posted by Toroblanco

Does look a little greasy. The size does indicate Thuri and if Peter says Thuri you could not get a better qualification. Nice find!

After I flatten it I will take some more pictures. It almost looks like it has a smear of dried glue on it. I'm not sure that it is; it could be some residue from whatever lubrication. But, the sides are cleaner and I guess I would say it kinda looks waxy like a crayon.

It does look like neither the seller nor the buyer knew the value of this thing .

I don't have any diamond plate, but have some sandpaper progressing from 120g to 3000g. I have an 8K synthetic stone. So, are these good instructions for flattening? If not I will just sand on one of the ends to get the info yall need until so I don't waste material on the top.

From https://www.japanesenaturalstones.com/how-to-use-guide/

How to smooth your natural stone:

Flatten your natural stone with a DMT (120 or 325) or Atoma (140). Sandpaper can also be used, it does not matter. Make sure to finish with highest grit possible. Smooth your natural stone with a higher grit 6-8K, or even 10K stone. A nagura or other natural stone can also be used. Your stone has to be like a mirror when it is dry and has some reflection when you look at the surface at the right angle. Small holes or big single scratches are OK, they do not affect sharpening that much, so do not bother to flatten them out

I usually start by cleaning a dirty stone by soaking it in a degreaser like Mean Green or something similar from the dollar store. (even if it is a Thuri it's possible that someone didn't follow the instructions and used oil on it). I don't think Thuri's soak up oil like Arkies so it should clean up easy. If you're anxious just to find out what it is then some wet-dry sandpaper on a piece of marble as a backer or even a aluminum cookie sheet from the thrift store placed on a cement floor will work. i've never used another stone to flatten a stone just sandpaper (or silicon carbide) up to 1k or 1500.

Originally Posted by tintin

I usually start by cleaning a dirty stone by soaking it in a degreaser like Mean Green or something similar from the dollar store. (even if it is a Thuri it's possible that someone didn't follow the instructions and used oil on it). I don't think Thuri's soak up oil like Arkies so it should clean up easy. If you're anxious just to find out what it is then some wet-dry sandpaper on a piece of marble as a backer or even a aluminum cookie sheet from the thrift store placed on a cement floor will work. i've never used another stone to flatten a stone just sandpaper (or silicon carbide) up to 1k of 1500.

Thanks Tintin. I should have some degreaser around here. I am already over budget on this box of stuff, so I not looking to buy a diamond plate or anything. So, I think that the baking tray and sandpaper is how I will go. Just have to make sure they are flat enough. I've also seen people just wet the counter and put the sand paper directly on that. As long as my girlfriend is asleep long enough I can lap it and clean up before she knows I should be alright .

Good to know I only need to go up to 1K to 1500.