How to remove the kaolin from the stone?
Of course, remove the time must pay attention to safety, if accidentally touched the skin, it is recommended to rinse with plenty of water, and if the skin redness, you can use the enemy rotten spirit wipe, remember, safety first.
Ordinary stone mainly silicate compound, hard texture and resistance to acid and alkali; and kaolin molecular formula Al2O3-2SiO2-2H2O, whether or not alumina, silicon oxide, alkaline, so only a small amount of NaOH can be removed through kaolin;
Kaolin has strong acid resistance, but its alkali resistance is poor. Try using this nature!
