Re: OK, is it myth or reality?
L. Hanson
>This is a report sent to me about using a dishwasher to clean old oil stones - I've put it on my web site in a sidebar in the Oil Stones article there:
QUOTE:
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A friend (Jeff Ranck) reported the following experiences to me that might be helpful on cleaning some very badly clogged oil stones:
"I tried the cleaning process you recommended, no go. I just couldn't seem to get anything very clean. I also noticed that the stone was not flat. I lapped the stone against some sandpaper on a flat granite tile. That cleaned the faces up well.
"In an old book, they talked about cleaning oil stones (after they had gotten really really bad) by putting a rag into a pot, adding some soap and boiling the stone. The rag keeps the stone off of the hot spot of the stove so it heats uniformly by the water (no cracking). The oil floats off as the heat opens the pores and the soap acts on the old oil. Sounded like something to try. However, my wife was less than enthusiastic about me boiling a greasy rock in her pans.
"Meanwhile, I read somewhere to try the dishwasher. Light-bulb flashed on. Put the stone in the dishwasher with a load of dishes (when my sweet wife was not home ) and wow! The stone looks brand new. No residue as far as I can tell (we don't use any type of rinse agent or anything)."

" A through C show the stone before I started to clean it. You can really tell the side my great grandfather used, it is almost black.
"D shows the best I could clean it using the methods you talked about and pretty much everything that was on my shelf that I thought might help clean the oil. Pretty good, but still a lot of stuff on the stone.
"E shows the true color of the stone after I started to lap it. Note how dished it is. This is why I think it is a softer stone like a soft arkansas or washita.
"F shows the stone after running through the dishwasher. Standard dishwasher soap no rinse agent. Let it cool before you put it on anything cold. When I thought about it, it makes sense. Dishwasher soap is designed to dissolve grease and oils. The hot temperatures of the dishwasher should help open the pores of the stone and the water
flushes the stone really well."
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I haven't done it myself, but it looks like it worked for Jeff (the pictures are his, not mine). I certainly wouldn't be scared to try. I think I would probably opt for the boiling in a pot on top of a bunch of rags, first, then try the dishwasher next. Also - it well could be the soap that does most of the cleaning.
I would also be careful while the stone is hot not to bring it into contact with something cold that might cause it to crack...
Leif
NorseWoodsmith.com