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Vinegar is used to preserve a wide variety of vegetables and fruits, along with meats, fish and eggs. Preserving food with vinegar is called pickling. A short list of foods â¦ that are commonly pickled would include pigs' feet, herring, beets, cucumbers, onions, olives, peppers, peaches, pears, and watermelon rind.o preserve food the pioneers used salt, and vinegar and they could have sun dried the food and they might have had root cellars to keep the preserved food edible and cool.
The shelf life of vinegar depends on the type and how it is stored. Because of it's high acidic properties, it is used as a preservative to keep other foods fresh.It is often used in canning, as in turning fresh cucumbers into pickles so that they can keep for years to come.hich means that white vinegar does not go bad ! This is because it is acidic by nature, thus it is self-preserving and does not require refrigeration. White distilled vinegar will remain basically unchanged over an extended period of time. This white variety can still safely be used for all purposes beyond any date.