Like frozen foods, canned foods allow food to be stored for the long term while preserving most of its nutritional qualities. Canning has the advantage of allowing food to be transported everywhere, but it has the disadvantage of standardizing and reducing the taste of food.
canning manufacturing process
The’Appreciation (named after its inventor, Nicholas Appert, 1749-1841) consists of heating between 100 and 150°C of food enclosed in a glass container, metal box, or an airtight plastic or aluminum bag. At this degree, the bacteria, The yeasts and the enzymes that can spoil the food is destroyed.
As long as the container is closed, the shelf life is theoretically unlimited. In practice, it’s a good idea to consume canned goods within two years of their manufacture, except for sardines in oil that improves with age. Once the container is opened, the storage time does not exceed 24 to 48 hours in the cold.
UHT . Technology
The UHT . Technology (Extremely high temperature, i.e. over 135°C for a few seconds) Eliminates microorganisms while preserving taste and increasing shelf life (three months at room temperature). It is applied to foods such as milk, sour cream, or fruit juices.
The semi-reserved They are tightly packed foods that are heated between 65 and 75 degrees Celsius. They can be stored a little longer than fresh products, at a maximum temperature of 10 ° C. This process is applied to many pies, cold meats and foie gras.
The pasteurization Close to canning, but requires lower temperatures (65 to 100 °C, in general). It is brief and followed by rapid cooling to maintain the quality of the food. Pasteurization is used to preserve foods such as milk, juice, honey, beer, or apple juice. It destroys Germs Responsible for diseases while preserving them Germs Not harmful to our health. for this reason, Pasteurized foods should be kept cold In order to avoid the proliferation of these Germs and food modifications. Do not confuse pasteurized products that can be kept cold with UHT products that can be stored at room temperature.