How to choose canned food

The selection of canned foods should be from the outside to the inside, look at the canned food body, look at the date, and then open the canned food to check the contents. All canned foods with recent production date, distinctive trademark, slightly concave bottom cover, clean and shiny appearance, no rust spots, complete soldering tin, tight sealing, no damage, no deformation and no expansion are normal canned foods. For glass bottles and canned foods, the middle part of the canned food cover is concave inward, the color of the food in the canned food is normal, the block shape is complete, the soup is clear, there is no sediment at the bottom of the canned food, and the canned foodning meets the standard is better. After the above identification, if there are still doubts or it is necessary to accurately determine the advantages and disadvantages, open the canned food to smell the smell of the contents and check its appearance color. After the food in the tank is poured out, carefully observe the inner wall of the tank box for blackening, corrosion or peeling of the coating layer. Those without rust spots, black spots and color change are preferred.

Taking tinplate canned foods as an example, the easiest way to identify tins is to observe the appearance of tins: first, check whether the canned foods are rusty and whether the labels are polluted, and then check whether the bottom cover of the canned foods is flat, slightly concave, not bulging, which is normal. If there is any doubt, you canned food tap the canned food cover gently and listen to its sound. Normal canned foods sound crisp. If they make a fluttering sound, it may be air leakage. Don't buy such canned foods.

When buying glass bottles and canned foods, in addition to referring to the above methods, observe the anti-theft cover. At present, general factories use anti-theft caps. The center of the normal canned food cap is concave. If the canned food has been opened or leaked, the center of the cap will bulge outward and canned food no longer be recovered, which is more convenient for consumers to identify.