Changing eggs raw materials are eggs, home with sawdust, lime, tea, pine branches and large materials made from the raw materials do not have lead, why do they say it contains lead?

Pi egg is China's unique egg processing products, but also a kind of alkaline food. The materials needed to pickle leather eggs are salt, tea, and alkaline substances (e.g., quicklime, grass ash, sodium carbonate, sodium hydroxide, etc.). The reason why the skin eggs have a special flavor is that after the strong alkaline action, the sulfur-containing amino acid that originally has been decomposed to produce hydrogen sulfide and ammonia, plus the smell of the ingredients in the impregnating solution, which produces the characteristic flavor.

In order to promote protein coagulation, lead oxide and lead salts are contained in the raw materials used in the production of leather eggs. (In the production of eggs, the outside of the fresh eggs wrapped in the auxiliary materials there is a kind of thing called Mitochondria, its chemical composition is lead oxide. During the process of making and placing, this lead oxide gradually penetrates into the egg. It has been measured that each gram of skin egg contains about 3 micrograms of lead, and each skin egg contains about 180 micrograms of lead when calculated at 60 grams). After inhaling trace amounts of lead for a long period of time, the human body will cause obvious harm to the nervous system, hematopoietic system and digestive system.

As for "lead-free eggs", they are not free of lead, but contain much lower levels of lead than traditional pickled eggs. Trace amounts of lead have little effect on the health of adults, but for children, lead-free eggs should be eaten sparingly or not eaten, because children are very sensitive to lead, and the absorption rate in the intestines is as high as 50%.