Method step
1. Prepare saturated salt solution with cold boiled water and salt.
2. Wash the undamaged fresh duck eggs, put them in a pressure cooker, and pour saturated salt solution to soak the duck eggs. The volume of duck eggs and salt solution shall not exceed 3/4 of the total capacity of the pressure cooker.
3. Install the rubber ring on the pressure cooker cover and tighten it.
4. Take a pump, connect its air duct to the air outlet of the high-pressure pot cover, inject air into the pot, then remove the pump, cover the high-pressure valve and let it stand for 3-4 hours.
5. Remove the high-pressure valve, open the pressure cooker and take out the duck eggs.
Pickling principle
Duck eggs are soaked in saturated salt solution. Under the action of high-pressure air, the osmotic pressure of salt solution increases, which enhances the penetration of salt solution into duck eggs. Therefore, salted duck eggs can be preserved in a short time, and saturated salt solution can penetrate into duck eggs evenly, so salted eggs are salty and light.