Maintaining Water Stones
Bob Haines
>Improved Method for Storing Water Stones �Wet�
I like to store my water stones wet so they are ready for immediate use if I need to touch up a tool on the fly. My shop is heated year round so there is no concern about damaging the stones due to freezing. I store them covered with water in sealable plastic utility containers design for food storage. I only problem I have experienced over time (several months) is the surfaces tend to get �slimy� from fungus/bacteria growth since the chlorine in the city water tends to dissipate very quickly and there is no residual over time to stop growth.
What I have found is if I store them in a mixture of 5 parts water mixed with 1 part isopropanol (70% rubbing alcohol from the local drug store), the stones remain very clean, pristine, and ready to use if stored in this solution. This works long term and there is no apparent damage in any way to the stones after >6 months wet storage. I also use a �spritz� bottle with the same solution to wet the stone if necessary while polishing and to wash away the black metal oxide residue. If you live in an area with very hard water and/or high dissolved solids, deionized or distilled water should be used with the alcohol.
Good water stones are expensive and the above inexpensive method seems to condition the stones and maintain them long term in a ready to use, pristine condition. Although it is generally believed that >4000 grit stones don't need to be soaked prior to use, I also find anecdotally that storing them in the alcohol solution seems to improve the uniform wear of the stone surface.
Regards,
Bob Haines