For centuries, man has been fighting problems of food preservation.
Some pathogenic microorganisms can develop in food and be subsequently ingested by humans. To avoid consumption of spoiled food, numerous techniques have been developed to preserve the freshness of food longer and ensure a better control of its quality.
Food preservation methods, old and current, were established according to one or several of the following principles:
Here are seven preservation techniques that rely on one or the other of these principles.