Not familiar with canned brands, worried about not being able to distinguish defective products? It doesn't matter, observing the outer packaging of cans is a very simple way to distinguish. First look at whether the outer packaging is neat and clean, and whether the handwriting is printed clearly. In addition, the label of canned food produced by regular manufacturers should be marked with product name, factory name, address, ingredient list, net content, solid content, implementation standard code, quality grade and shelf life. Finally, don't forget to look at the production date and buy the products within the warranty period.

Carefully identify the quality:

Next, check the quality of the cans themselves.

Canned fish and meat: Most of these cans are tinned. Because the inside of a good can is vacuum, the top or bottom of the can should be flat or concave. For those cans that are air-tight or improperly sterilized, there are still bacteria in the cans, which will produce gas, so the top or bottom of the cans will bulge, so the cans can no longer be eaten.

Canned vegetables and fruits: Most of these cans are packed in glass bottles, and the contents can be seen. A good can should have even contents and clear soup. The contents of bad cans vary in size, and the color of soup will be much heavier.