The secret to choosing safe canned food

If the food box is bulging, gently press it in place. If it does not collapse or swell again when you remove it, be determined to leave.

When choosing cans, first look at the shape of the box, if the box is inflated, it is necessary to determine whether it is ' bulging ' or ' microbiology ' by lightly pressing. If it collapses, when you let go of your hand does not inflate, it is swelling. If you press hard and the place is still not flat or swollen when the hand is removed, it is microbial swollen. Canned food is still in use, while microbiological swell must be removed.

Canned food of good quality when typing with a squeak. If the box bulges out, the two caps bulge, tapping on the sound of a thud, which proves to be broken. If not identified or suspected, it is best not to buy.

When you open the box, if you find that the varnish layer is not intact, stained, has a metallic flavor, the unpleasant smell of H2S or NH3, does not have a delicious taste characteristic of each type of food, do not use it . Canned food that is stored for a long time when used should be dipped in a basin of water, preferably 70-80 degrees Celsius, and then put down on your hands to see if air bubbles rise. Can also be put in a boiled water. If the cans are good, the two caps will bulge; Otherwise that means the food has been damaged.

If you see two boxes that are slightly concave, it is good canned food (because when processing, it must be treated at high temperature; after canning, steam in the condensate box, air is diluted, pressure in the small box more outside makes the lid of the box recessed deeply).

When buying canned food, check whether the lid is loose, open, or if the iron is rusty, or not, if not, choose it. In addition, you need to pay attention to the information on the label:

- See the label with the name and address of the manufacturer. If not, show that the food has a quality problem or maybe a fake food.

- See the expiry date, preservation instructions, instructions for use.