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Freezer burn is caused by cold air around the product, sucking the moisture out of the food. Using a vacuum sealer device such as the foodsaver products, will greatly increase the time that food can be frozen since the food is not only sealed from the air in the freezer, but also, must of the...

Citric acid is commonly used with tomato product canning. Most fruits have enough acid content to enable safe water bath canning. Most veggies require pressure canning as they have little acid content. Tomatoes are technically a fruit, but are of borderline pH (a measure of acidity) for safe...