If you boil bone broth for a long time, you will get something gel-like. The juice of the soup is concentrated into gels, which are gelatin.
It takes a long time for families to make gelatin, how can you get a lot of gelatin effectively?
In the British documentary "Food Intelligence Group", in order to find out the production process of gelatin, it went to the northern German city of Minden, one of the top gelatin producers in Europe.
There, the raw material used to make gelatin was pork skin; not cow bones as the average person thought. The whole production plant smells like a pork ham factory.
They used most of the pig's skin, all piecemeal, not a whole piece of pig skin.
Judging from the shape of these pigskins, they are all pig skins with corners and corners, which feel like waste utilization.
The gelatin of the pig is in the pig skin. There is a key protein that is high in pig skin. Pork skin contains collagen and fat.
Gelatin is made of collagen. A quarter of any animal is collagen. Collagen is the main structural protein of the body's connective tissue.
So, why use pig skin? Why not use pig bones?
Because collagen extraction from pig skin is fast, it only takes two or three days to obtain solid gelatin.
If pig bones are used, the extraction process takes about three months, so the production cost will be higher.
To extract collagen from the pig skin, the pig skin is first chopped, water and vinegar are added, and boiled with pig skin and water, and the upper layer is mostly fat. The less dense fat in the tank will float on the surface.
The remaining old skins settle at the bottom of the tank and can be sold as feed.
The pork skin soup after boiling is very cloudy, and the steps of filtration and purification are carried out afterwards. After flowing through a 3-kilometer filter pipe, it leaves no fat or pig flavor to make a transparent liquid without fat.
Heat this liquid to remove moisture from the collagen to make a whole new protein.
The gelatin containing the moisture is pressed through the oil hole device and the strip gelatin is fed into a giant dryer. It looks like a carpet made of pasta.
Gelatin is solid and very hard. Although it is solid in the greenhouse, it melts in the mouth and is very suitable for making candy.
Gelatin comes from the by-product of pig skin, and finally made this amazing versatile protein, which is simply a miracle from no change.