Ketchup needs to be put in the refrigerator, because after it is opened, there will be bacteria invasion, which will cause texture change, and keeping it at a low temperature can effectively prevent texture change.

Ketchup is a concentrated product of fresh tomatoes in sauce form. It is a bright red sauce with the unique flavor of tomato, and is a characteristic condiment that is generally not directly imported.

The unopened ketchup can be kept for a year, and the opened ketchup can only be kept in the refrigerator for 2 to 3 months.

After the canned tomato sauce is opened, if it is not eaten all at once, it will be easy to deteriorate after a period of time. If the canned tomato sauce to open a mouth, first into the pot to steam before eating, leftover tomato sauce can be in a longer period of time does not deteriorate. There is another good way to prevent tomato sauce from spoiling, that is, canned tomato sauce in the opening layer of plastic wrap sealed, into the refrigerator cold layer can also be stored for a long time.

1, lemon is a good antioxidant, can extend the shelf life of tomato sauce.

2, recommended to put the ketchup when the use of a lid can be sealed heat-resistant glass containers, before use with boiling water to wash clean, and keep the bottle dry.

3, from the bottle of jam, use a clean waterless spoon, the best to eat as much as take as much as possible, after removing the bottle cover tightly.

4, homemade ketchup stored in the refrigerator freezer, can be kept for 7 days.