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A Mason jar, also known as a canning jar, preserves jar or fruit jar, is a glass jar used in home canning to preserve food. It was named after American tinsmith John Landis Mason, who patented it in 1858. The jar's mouth has a screw thread on its outer perimeter to accept a metal ring or "band".
The glass jars come in a variety of shapes and sizes, have rubber seals, glass lids, and stainless steel clips. Food is processed in Weck jars using the water bath canning technique, not a pressure canner. During the canning process the lids are secured by the clips which must be removed once the processing is complete and the jars have cooled.
A jar of yeast extract. Candy jar, by Christian Dorflinger , 1869–1880, glass, diameter: 12.1 cm, Cleveland Museum of Art (USA) Hexagonal jar decorated with flowers and birds, late 17th century, porcelain with overglaze enamels, height: 31.1 cm, diameter: 19.1 cm, Metropolitan Museum of Art (New York City)
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A canning jar used by Nicolas Appert's canning factory. Shortly before the Napoleonic Wars, the French government offered a hefty cash award of 12,000 francs to any inventor who could devise a cheap and effective method of preserving large amounts of food to create well-preserved military rations for the Grande Armée. The larger armies of the ...
During the canning process, while still hot (and presumably sterile), the lids are secured by metal tension clips which are removed once cooled and a vacuum seal has formed. [ 4 ] Other equipment marketed by the company included a large electrically heated waterbath and "sterilizing thermometer", a glass thermometer mounted on a concave ...
Oil prices bounced around quite a bit in 2024. They rallied more than 20% at one point -- topping $85 per barrel -- before cooling off toward the end of the year. Oil was recently below $70 a ...
Canning involves cooking food, sealing it in sterilized cans or jars, and boiling the containers to kill or weaken any remaining bacteria as a form of sterilization. It was invented by the French confectioner Nicolas Appert. [4] By 1806, this process was used by the French Navy to preserve meat, fruit, vegetables, and even milk.
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