Food Preservation Then and Now. Thanks Napoleon! The canning process dates back to the late 18th century in France when the Emperor Napoleon Bonaparte,

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Presentation transcript:

Food Preservation Then and Now

Thanks Napoleon! The canning process dates back to the late 18th century in France when the Emperor Napoleon Bonaparte, concerned about keeping his armies fed, offered a cash prize to whoever could develop a reliable method of food preservation. A Frenchmen conceived the idea of preserving food in bottles. After 15 years of experimentation, he realized if food is sufficiently heated and sealed in an airtight container, it will not spoil.

Armies need food The first commercial canning factory was established in England in As more and more of the world was explored, and as provisioning armies took on greater importance, the demand for canned foods grew. Thomas Kensett, who emigrated to the United States, established the first U.S. canning facility for oysters, meats, fruits and vegetables in New York in 1812.

How we preserve food Heat sufficient to destroy microorganisms is applied to foods packed into sealed, or "airtight" containers. The canned foods are then heated under steam pressure at temperatures of °F ( °C). The amount of time needed for processing is different for each food, depending on the food's acidity, density and ability to transfer heat. For example, tomatoes require less time than green beans, while corn and pumpkin require far more time.

Location is key To ensure that foods are packed at their peak of freshness, most canning facilities are located within a few miles of the point of harvest

Because canned food is packed at the peak of harvest, it also is packed at its nutrient peak. As foods age, they begin to shed some of their essential nutrients.

Mason Jars The Mason jar was invented and patented in 1858 by Philadelphia tinsmith John Landis Mason.

A native of Philadelphia, Mason was born in 1832 and became a tinsmith by trade. Because most mason jars were produced by rivals after his patent expired in 1879, Mason did not become wealthy from his profitable invention. He died a pauper in New York City in 1902.

Lets Can! Discovery Garden Tomatoes