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Canning is a method of food preservation in which food is processed and sealed in an airtight container (jars like Mason jars, and steel and tin cans). Canning provides a shelf life that typically ranges from one to five years, [a] although under specific circumstances, it can be much longer. [2]
Home canning or bottling, also known colloquially as putting up or processing, is the process of preserving foods, in particular, fruits, vegetables, and meats, by packing them into glass jars and then heating the jars to create a vacuum seal and kill the organisms that would create spoilage.
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 correctly sealed jar is indicated when the tab of the rubber seal points downward.
However, glass containers presented problems for transportation. Shortly after, the British inventor and merchant Peter Durand patented his own method, this time in a tin can, creating the modern-day process of canning foods. [5] Canning was used in the 1830s in Scotland to keep fish fresh until it could be marketed.
For five years, Andrews allegedly treated Jones using air baths, a treatment where the patient would spend a period of time in a tank full of compressed air. [3] In 1872, Jones developed a vacuum canning process for preserving food, with the help of Professor Leroy C. Cooley of Albany, who was the brother-in-law of her sister Emily. At the time ...
A double seam is a canning process for sealing a tin can by mechanically interlocking the can body and a can end (or lid). Originally, the can end was soldered or welded onto the can body after the can was filled. [1] However, this introduced a variety of issues, such as foreign contaminants (including lead and other harmful heavy metals).
A potted meat food product is a food preserved by canning and consisting of various seasoned cooked meats, often puréed, minced, or ground, which is heat-processed and sealed into small cans. Various meats, such as beef, pork, chicken, and turkey, are used. It is produced primarily as a source of affordable meat.
The DWI process is used for making cans where the height is greater than the diameter, and is particularly suited to making large volumes of cans of the same basic specification. [ 14 ] Steel can wall thicknesses are now [ when? ] 30% thinner and weigh 40% less than 30 years ago, reducing the amounts of raw materials and energy required to make ...