The main function of aluminum foil bags is to deoxygenate, which is beneficial to prevent food from spoiling. The principle is relatively simple. Food mold and spoilage are mainly caused by the activities of microorganisms, and most microorganisms (such as molds and yeasts) need oxygen to survive. Aluminum foil bags use this principle to remove oxygen from the packaging bag and food cells, so that microorganisms lose their living environment. Experiments have shown that when the oxygen concentration in the packaging bag is ≤1%, the growth and reproduction rate of microorganisms will drop sharply. When the oxygen concentration is ≤0.5%, most microorganisms will be inhibited and stop reproducing.
