Methods of food preservation

This is the process of sealing food in an airtight container to preserve it. Under no-air storage conditions, microbes cannot grow and survive.

During vacuum packing, the foods are placed in a plastic bag, and a vacuum is created inside the bag, by sucking the air out of the bag. 

This method is also used for preserving nuts as it avoids oxidation reactions, such as rancidity, and thereby preserves the flavor.

Find more about vacuum packaging here.