History of Food Preservation Timeline

Butter and similar substances have been preserved as bog butter in Irish peat bogs for centuries. The cold, acidic, and oxygen-poor environment of the bogs slowed spoilage, allowing dairy fat to be stored for long periods, sometimes even decades, before being recovered and consumed.

Image source: Bog butter

Jugging was a popular method of preserving meat up until the middle of the 20th century. Meat was stewed and then sealed tightly in a covered earthenware jug or crock, often with gravy or broth, which excluded air and kept the meat safe from microbial spoilage.

Image source: Jugging

Century eggs are traditionally created by placing eggs in alkaline mud (or other alkaline substance), resulting in their "inorganic" fermentation through raised pH instead of spoiling. The raised pH preserves the eggs and transforms them into a translucent, dark delicacy prized in Chinese cuisine.

Image source: Century egg

Modern recipes for century eggs also call for lye. Using sodium hydroxide instead of traditional mud accelerates the alkaline curing process, producing century eggs more quickly and consistently while achieving the same pH-driven preservation effect.

French confectioner Nicolas Appert developed a method of preserving food by sealing it in jars and heating them, laying the foundation for modern canning. His work was rewarded by Napoleon's government, which sought better ways to feed its armies.

Image source: Nicolas Appert

By 1806, this process was used by the French Navy to preserve meat, fruit, vegetables, and even milk. The ability to carry nutritious preserved food on long voyages transformed naval provisioning and demonstrated the practical value of Appert's heat-preservation technique.

This method was invented by Louis Pasteur, a French chemist, in 1862. Pasteurization involves heating liquids such as milk and wine to a temperature that kills harmful microorganisms while preserving flavor, dramatically improving food safety and shelf life.

Image source: Pasteurization

Although Appert had discovered a new way of preservation, it was not understood until 1864 when Louis Pasteur found the relationship between microorganisms, food spoilage, and illness. This germ theory insight explained why heating and sealing food prevented decay, giving scientific grounding to preservation techniques.

Image source: Louis Pasteur

Hurdle technology has been defined by Leistner (2000) as an intelligent combination of hurdles that secures the microbial safety and stability as well as the organoleptic and nutritional quality and the economic viability of food products. It combines multiple preservation factors like temperature, acidity, and water activity to inhibit microbes.

By 2005, the process was being used for products ranging from orange juice to guacamole to deli meats and widely sold. High-pressure processing inactivates pathogens and spoilage organisms without heat, preserving fresh taste and nutrients in commercially available foods.