Why are Songhua eggs called Songhua eggs?

Songhua eggs are from the Songhua River.

Songhua eggs are duck eggs. Compared with eggs, duck eggs are larger in size and thicker in shell, and in the process of making Songhua eggs, the eggs are placed in alkaline substances, and these characteristics of duck eggs are more suitable for processing into Songhua eggs. The size of the egg is small, the shell is thinner, and the thickness is uneven, and the egg white is prone to hydration reaction in alkaline substances, which requires high processing technology.

From the characteristics of duck eggs and eggs themselves, and considering the cost of processing, duck eggs are more suitable for making Songhua eggs.

The principle of the formation of pine eggsThe basic principle of preserved egg formation is mainly that the protein is denatured and coagulated by alkali. Quicklime (CAO) and soda ash used in processing produce strong alkaline sodium hydroxide in water.

When the egg white and egg yolk encounter a certain concentration of sodium hydroxide, they are denatured due to the destruction of the protein molecular structure, and some proteins are denatured to form an elastic gel.

01 Preserved eggs, also known as Songhua eggs, changed eggs, etc., are egg processed foods invented by the Han people in China, which is a unique food in China, with a special flavor and can promote appetite.

02 Preserved eggs are pickled by mixing soda ash, lime, salt and lead oxide, which contain lead, so if eaten regularly, it may cause lead poisoning. This can lead to symptoms such as insomnia, inability to concentrate, anemia, joint pain, slow thinking, and impaired brain function. In addition, lead can replace calcium, affecting calcium intake and possibly resulting in calcium deficiency.

03 Lead-free preserved eggs are delicious and nutritious, but children are in the stage of vigorous physical development, and the harmful reaction to lead is more obvious, so it is better to eat less. In the hot summer weather, most people like to treat their family with Songhua eggs when they drink beer, or treat their families to Songhua eggs, and they may never think that Songhua eggs can also cause food poisoning. According to the inspection and analysis of relevant food experts, there are only 400 500 bacteria on the eggshell of clean Songhua eggs, while there are as many as 100 million 400 million bacteria on the eggshell of dirty Songhua eggs.

When buying Songhua eggs, it should be noted that after the Songhua eggs are peeled, their protein is dark brown and transparent, with a certain toughness; The contaminated Songhua eggs are light green, with poor toughness and easy to loosen, so such Songhua eggs must not be eaten.

04 Contraindications for consumption.

Songhua eggs cannot be eaten with yellow eels. Although Songhua eggs contain a lot of protein, preserved eggs are alkaline foods, and although yellow eels are also delicious, eating them together with preserved eggs can cause diarrhea and food poisoning.

Songhua eggs cannot be eaten with brown sugar. Since preserved eggs are alkaline foods and brown sugar are acidic, when preserved eggs and brown sugar are eaten together, the acid will fuse with alkaline, resulting in acid-base imbalance. Therefore, the combination of brown sugar and preserved eggs can cause stomach problems and mild food poisoning.

The same preserved eggs cannot be eaten with white sugar or rock sugar.

Songhua Hengqiao eggs usually refer to preserved eggs, which are made from duck eggs or eggs marinated under a mixture of soda ash, lime, salt and lead oxide.

The finished Songhua egg, the eggshell is easy to peel and not sticky, the egg white is translucent brown solid, the surface of the egg white has a pine branch pattern, the egg yolk is dark green and solid, and some have a sugar heart. When cut, the egg pieces are colorful. The food is refreshing and delicious, fragrant but not greasy, and delicious.

The quality inspection and grading of Songhua eggs is the last important process of the manufacturer, which should be carried out in accordance with the relevant provisions of the state.

When consumers buy goods, they also have to make choices. Because of the use of lime, salt, alkali, water as ingredients, the production relies on chemical reactions, the egg has a similar pine branch pattern, so it is called Songhua egg. China's Songhua egg production area is extensive, the methods are diverse, and the history is long.

As early as 1319, the "Summary of Agricultural Mulberry Food and Clothing" recorded the processing of Songhua eggs, which has a history of more than 700 years. The pickled Songhua eggs are changeable in color, delicious in taste, fragrant and refreshing, and are delicious to accompany wine and meals, and are easy to preserve and carry.

How to buy Songhua eggs

Commercially available preserved eggs include duck eggs or preserved eggs, which can be selected according to personal preference. When buying preserved eggs, you can pay attention to whether there is a quality certification mark. In addition, preserved eggs with high lead and copper content, there will be more spots on the surface of the eggshell, and the color of the egg white part can also be seen after peeling, which is more black and green or occasionally black, so it is not suitable to buy.

Some of the preserved eggs made by traditional methods will be wrapped with red clay and straw on the surface of the eggshell, which is actually unhygienic and inconvenient to judge the lead content from the appearance of the first defect, so it is not suitable for purchase. Pay attention to the date of manufacture when purchasing, and pay attention to the method and expiration date when you store it at home.