1, put the porcelain pot in a cold water pot (be sure to put it in cold water) and add some vinegar, preferably grain vinegar. When the fire comes to a boil, don't let the water pass through the porcelain pot. Add one or two ounces of vinegar and boil for another twenty minutes. After boiling, it can not only remove lead but also prevent cracking. After cooling, wash it with detergent and you can use it.
Generally speaking, in order to make the surface of porcelain medicine cans look good, the surface is usually decorated with colorful patterns, and the pigments in the patterns contain lead and cadmium. However, the porcelain medicine cans of regular manufacturers are strictly tested, and the dissolution of lead and cadmium meets the national mandatory standards, so they are safe and reliable.