1, lead-free egg production Materials: 40 duck eggs, quicklime 360kg, soda ash 140g, salt 160g, black tea 20g, ferrous chloride 10g. 0.5kg of water and 20g of black tea boiled and filtered, put the filtrate in a container; quicklime, soda ash, salt, ferrous chloride and 1.9kg of water to join the filtrate, stirring appropriately, to be fully functional, filtration and take its filtrate standby; the selection of qualified fresh duck eggs gently into the filtrate impregnation, egg surface with a cover or a heavy weight to prevent the egg from exposing the liquid surface, pickled eggs, pickled eggs are not the correct recipe. Filtering, take its filtrate standby; the selection of qualified fresh duck eggs gently into the filtrate impregnation, egg surface with a cover or a heavy weight pressure, so as not to expose the eggs to the surface of the liquid, marinated for about two weeks will be taken out, air-drying placed in room temperature storage for two weeks, can be matured into a good flavor of the eggs. 2, mud-free egg production Add 2kg of water in the pot, add 10g of fennel, pepper 20g, black tea 100g, boil for 5 minutes and remove, add 300g of edible soda ash, to be completely dissolved, add a little pine leaves or cypress leaves, made of soaking liquid. Yards in the porcelain container into 50 washed duck eggs or eggs, the cooled soaking liquid poured into the egg container, be sure to completely submerge the egg, if the liquid is not enough, you can add some cool boiled water. Then seal the container for 10 to 14 days. Take it out and let it dry for 4 to 5 days. It will be made into a mud-free loose flower skin eggs.