Henan preserved egg material formula: egg, quicklime, alkali, water, sawdust production process: boil the water, and when the water temperature is cool enough to start, add the alkali, and try to put the alkali and the egg together. The amount of alkali is equivalent to putting an egg on a coin about ten cents on the water. If the egg is too big out of the water, it means there is too much alkali, and the egg feels like a burner, and vice versa. After putting the amount of alkali, pour in the quicklime. This amount should be enough for eggshells. Use a slightly thicker wire to pinch a circle (just to cover the egg, that is, to prevent it from being burnt by lime) to catch the egg. Take out the eggs and roll them in sawdust with lime, then put them in a plastic bag and seal them for a few days (it is best to put them in spring, eight days in cold weather and seven days in hot weather, because the temperature is the most suitable and easy to grasp), and then take them out and let the wind blow for one day.