During the period of 1809, world trade developed vigorously. Seafarers who have lived on board for a long time get sick because they can't eat fresh vegetables, fruits and other foods, and some even suffer from serious life-threatening septicemia. So the French government asked for a way to store food for a long time with a huge bonus of 12000 francs. Many people devote themselves to research activities in order to win prizes. Among them, Mr. and Mrs. Appel, French people who manage candied food, put all their energy into continuous research and practice and finally found a good way: put the food in a wide-mouth glass bottle, plug the bottle with a cork, heat it in a steamer, then plug the cork tightly and seal it with wax. In this way, the earliest cans appeared. Abels was rewarded by the French government and warmly welcomed by the sailors.

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The earliest cans were made of glass bottles, and the bottle mouth was tightly plugged with cork and iron wire. /kloc-at the end of 0/8, French general Napoleon led an army to attack in all directions. Because the front line is too long, a lot of food will rot and deteriorate after being transported to the front line. He hoped to solve the problem of grain storage in the war March, so he offered a huge reward of 12000 francs. If anyone can invent the technology and equipment to prevent food from going bad, give him this huge sum of money.

Many French scientists have been trying to think about this problem. At that time, there was a chef named Appert Nicolas (1749- 184 1) who worked as a worker in sauerkraut factory, winery, candy store and restaurant. When selling fruit pulp, wine and other foods, he found that some often go bad, and some are not easy to go bad. He also happened to find that food sealed in glass containers would not go bad if heated properly, which greatly inspired him. Therefore, Appel responded to the public's reward and specially studied the method of food preservation.

After ten years of hard research, he finally succeeded 1804. He processed the food, put it in a jar, put it all in a boiling pot, heated it for 30-60 minutes, stuffed it with a cork while it was hot, and then reinforced it with thread or sealed it with wax. This technology was disclosed after 18 10 was patented. In this way, food can be preserved for a long time without spoilage. This is the embryonic form of modern canned food.

Appel received a bonus from Napoleon and opened a factory to provide food for the French army. Shortly after Appel's glass jar came out, an Englishman named Peter Durand developed a tin jar made of thin and hard iron, which was patented in Britain and later obtained by Hall, gamble and Tang Jin. It is the ancestor of the commonly used tin can.

1862, French biologist pasteur published a paper pointing out that food corruption is caused by bacteria. Therefore, the cannery adopts steam sterilization technology to make canned food reach the standard of absolute sterility. Today's aluminum foil packaging cans were born in the United States in the 20th century.