Canning is a method of preserving food where the food is sealed in an airtight container. It prevents microorganisms from entering and proliferating inside. To prevent the food from being spoiled before and during containment, quite a number of methods are used: pasteurization, boiling, other means of high temperature applied over a period of time, refrigeration, outright freezing, drying, vacuum treatment, antimicrobial agents that are natural to the indegenous recipe of the foodstuff being p… (More on Canning)