Homemade ketchup want to keep for a long time, it is best to make a pure ketchup, in the production of no oil, the ketchup will be simmered out in a low fire, simmer until thick, add a few drops of lemon juice. It is generally 10 to 15 days, and its flavor is good, provided it is preserved properly. Be sure to make sure that oil stains and raw water are present when filling the altar, as this will help preserve the ketchup.

Homemade ketchup is also easy to make, although there is a shelf life of up to nearly 15 days, but it is best to eat within 3 days, so that its flavor is not only undiminished, but also eat the most fresh and sour, after all, placed for a long time, it is difficult to guarantee the quality, especially for small children, it is best to make a fresh ketchup and eat it, not overnight.