1. When you buy a glass bottle, you must have a lid.

2. After filling, put it in a steamer and steam for 5 minutes.

3. Under pressure, the bottle cap will shrink inward and the jar will be sealed.

Note: the content of water and sugar in canned fruit is very high. After opening the lid, it is easy to cause a large number of microorganisms to multiply, leading to rancidity of the product and loss of edible value. It is recommended to eat it all at once after opening the lid.

Extended data:

To know how canned food can be preserved for a long time, we must first know what causes food spoilage. Microbes will breed in food, constantly decompose nutrients in food, change the composition of food, and food will go bad.

disinfect

Both food and canned food need disinfection. After bacteria and bacterial spores are eliminated, there will be no bacteria to reproduce. But it is unlikely to be completely eliminated. What we can do is to basically sterilize and prolong the preservation time of food as much as possible.

seal

There are also a lot of bacteria and bacterial spores in the dust in the air. Spores of bacteria, like seeds of trees, are very durable and can float in the wind. So the can is vacuum sealed.

Prevention law

There are preservatives in canned food, because bacteria can multiply rapidly in suitable environment. Even if there is only one bacterium, it will soon become countless because of its fission and reproduction. Preservatives can effectively inhibit the survival of bacteria, so that a few bacteria can not survive, and food will be preserved for a long time.

Baidu encyclopedia-canned fruit