Nicolas Appert

Nicolas Appert was a French confectioner and inventor who changed how the world stores food.

He is widely known as the "father of food science" because he developed the first method for airtight food preservation. In the early 19th century, his work allowed people to keep many different types of food for much longer periods. This was a major breakthrough for nutrition and travel. Before his discovery, people often relied on dried or salted provisions. These older methods were not always as high in quality as Appert's preserved goods.

Appert's preservation process involved a specific sequence of thermal processing steps. He began by filling thick, large-mouthed glass bottles with various food items. These items included beef, fowl, eggs, milk, and many prepared dishes. He purposefully left a small amount of air space at the top of each bottle. To create an airtight seal, he used a cork and a tool called a vise to press it firmly into the jar. He sometimes used a mixture of cheese and mineral lime to help seal the bottles. After sealing, he wrapped the bottles in canvas for protection. Finally, he placed the containers into boiling water. He boiled them for as long as necessary to ensure the contents were cooked thoroughly.

There were several different stages and materials used in the evolution of this technology. Initially, Appert used champagne bottles, but these were not always sealed perfectly. He eventually transitioned to the larger, thicker glass bottles mentioned above. He avoided using tinplate in his early manufacturing because the French tinplate at the time was of poor quality. Later, the method evolved further when other inventors changed the container material. In 1810, a British inventor named Peter Durand patented a method using tin cans. This shift from glass to metal created the modern canning process we recognize today.

Appert's journey began in Châlons-en-Champagne, where he was the ninth of eleven children. He worked in his family's inn before opening a brewery with his brother. He later served as a head chef for thirteen years under Christian IV, the Count Palatine of Zweibrücken. Between 1784 and 1795, he worked as a confectioner and chef in Paris. His life coincided with the French Revolution, a period of great political change. He was arrested in April 1794 during the Reign of Terror but managed to avoid execution. In 1795, he began his formal experiments to find ways to preserve soups, vegetables, and juices.

Despite his scientific success, Appert struggled with significant financial challenges. His equipment was very expensive, and he was not a highly skilled businessman. He declared bankruptcy in 1806, though he was able to continue his work. In 1795, the French army had offered a 12,000-franc prize for a new food preservation method. In 1810, the Bureau of Arts and Manufactures gave him an ex gratia payment of 12,000 francs. This payment came with a specific condition: he had to make his process public. Appert accepted the money and published his findings in a book.

His published treatise was titled *L'Art de conserver les substances animales et végétales*, or *The Art of Preserving Animal and Vegetable Substances*. This was the first book ever written about modern food preservation methods. In 1810 alone, 6,000 copies of this book were printed. Interestingly, Appert never fully understood the biological reason why his method worked. The science of bacteriology had not yet been developed during his lifetime. He did not know that heat killed the bacteria that cause food to spoil. However, his method was so effective and simple that it spread quickly across the world.

Appert's inventions had a massive impact on global logistics and military services. His preserved goods were highly valued by naval services. These products were much better than the dried or salted food sailors previously had to eat. His goods were even exported to places as far as Bavaria and Saint Petersburg. Even though he received silver and gold medals from the *Société d'encouragement pour l'industrie nationale*, he remained in financial difficulty. His factory at Massy was even destroyed by Prussian and Austrian forces in 1814. Ultimately, he died in poverty in 1841, but his legacy lives on through the science of canning.