Canned food is popular among consumers because of its low price, easy portability, long shelf life, and convenient consumption. It is especially popular during holidays when people travel.
A wide variety of canned foods, canned food packaging can be divided into glass and metal cans, using its physical and chemical properties can determine the quality of packaged foods. With the continuous improvement of people's lives, the demand for canned foods has also increased. Therefore, consumers should have a method to correctly determine the shelf life of canned food. Usually there are the following points:
Canned food cans are printed with clean, clear and distinctly printed logos. The quality guarantee period and the date of manufacture are printed on the trademark. The general shelf life is 8 to 24 months. The state reserves for all kinds of canned foods. ".
8 months: sugar water bayberry, fresh citrus juice, steamed shrimp, peanuts, etc.;
12 months: Litchi juice, tomato sauce, lemon juice, pickled cucumber, etc.;
18 months: luncheon meat, ham luncheon meat, etc.;
24 months: saury, mushrooms, sugar pear, sugar pineapple, sugar peach, oil-impregnated herring, raw pork, braised pork, steamed beef, steamed lamb, and salted beef.
Whether the canned food is within the shelf life can be easily calculated from the printed date of manufacture; it can be marked out from the hard code of the canned food; the name of the manufacturer, address, contact telephone number, etc. are printed on canned food produced by the regular enterprise. The fundamental difference from the "three nothing" products.
The freshness and quality of canned foods are the most concerned and most important to consumers. For example, whether the fruit in the canned fruit in the glass jar is oxidatively degenerated and whether the sugar water is clear and transparent, there should be no turbid sedimentation phenomenon. Once it is consumed, it will taste odor, there will be mildew or other strange odor, that is, Stop eating. The food packaged in the glass bottle will give a crisp sound when hitting the metal bottle cap of the normal product. This is because there is a certain degree of vacuum in the glass bottle package. Foods packaged in metal cans should have metal luster on the surface and edge seams of the metal packaging, no rust, no rust, and the bottom of the upper lid of the packaging cans should be flat or slightly dimpled, and the welds and curls should be free from damage. No rust, no rust, if the above phenomenon, please use with caution. If a drum is found on the bottom of the lid, it indicates that the food in the metal box has been contaminated by microorganisms, oxidized and degraded, and the gas generated by the corruption generates side pressure on both sides of the can, resulting in a metal drum.
As we all know, in the production of canned foods, we must add a certain amount of additives, such as food colors, flavors, preservatives and so on. Although Timothy's additives are strictly regulated and meet national food additive standards, they are not harmful to the health of adults, but they will have a certain impact on the health of children and young children who regularly consume canned foods, as young children are developing and growing. The various organs are under development and the liver has poor detoxification function. Therefore, eating more canned food will inevitably affect the development of the body and lead to undesirable consequences. Vitamin C and other vitamins in canned foods will be lost after heating and storage for a long time. A majority. Long-term consumption of canned foods will lack vitamin C supplements and other vitamin intakes. Therefore, it is necessary to eat more vitamin-rich fruits and vegetables and other foods to supplement, so young children should not eat more. Today's canned foods are entering more and more families. Raising the quality of canned foods and producing more varieties are the priorities and development directions of canned food production.