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3 Lift Roll CutterSlide Cutter Insert Bagwww.foodsavereurope.com8 Vacuum Packaging and Food Safety The vacuum packaging process extends the life of foods by removing most of the air from the sealed container, thereby reducing oxidation, which affects nutritional value, flavour and overall quality. Removing air can also inhibit the growth of micro- organisms, which can cause problems under certain conditions: Mould – Easily identified by its fuzzy characteristic. Mould cannot grow in a low oxygen environment, therefore vacuum packaging can slow the growth of mould. Yeast – Results in fermentation, which can be identified by smell and taste. Yeast needs water, sugar and a moderate temperature to grow. It can also survive with or without air. Slowing the growth of yeast requires refrigeration, while freezing stops it completely. Bacteria – Results in an unpleasant odour, discolouration and/or soft or slimy texture. Under the right conditions, anaerobic bacteria such as Clostridium Botulinum (the organism that causes Botulism) can grow without air and sometimes cannot be detected by smell or taste. Although it is extremely rare, it can be very dangerous. To preserve foods safely, it is critical that you maintain low temperatures. You can significantly reduce the growth of microorganisms at temperatures of 4°C (40°F) or below. Freezing at -17°C (0°F) does not kill microorganisms, but stops them from growing. For long-term storage, always freeze perishable foods that have been vacuum packaged, and keep refrigerated after thawing. It is important to note that vacuum packaging is NOT a substitute for canning and it cannot reverse the dete rio ration of foods. It can only slow down the changes in quality....