Reserve the soaking liquid (rice water) in a pot large enough to accommodate the stone bowl.
Wash the bowl to remove any powdery residue from the stone grinding process.
Gently lower the bowl into the pot with rice water. If there is insufficient rice water to submerge the pot, top up with a little more water so that the stone bowl is fully submerged.
Place the pot on the stove and turn it on to medium heat. Bring the rice water to a boil.
Add salt and allow the stone bowl to "cook" for 30 minutes.
Turn off the stove. Let the stone bowl soak in the hot liquid until it is cool. The stone bowl should only be very slightly warm.
Remove the stone bowl from the pot and rinse it in the sink.
Wipe a thin layer of sesame or vegetable oil over the entire surface of the stone bowl.