date:Jan 02, 2019
g preserved eggs by replacing lead oxide with zinc oxide and other substances have emerged, which is called lead-free preserved eggs technology. Generally speaking, the eggs made by traditional technology are prone to black spots on the eggshells. Preserved eggs made with lead-free technology are less likely to produce black spots. It is worth noting that the regular manufacturers seldom use the old technology to make preserved eggs. The self-produced and self-sold preserved eggs are difficult t