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Preserved food in Mason jars. 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.
External vacuum sealers involve a bag being attached to the vacuum-sealing machine externally. The machine will remove the air and seal the bag, which is all done outside the machine. A heat sealer is often used to seal the pack. Typically these units use a dry piston vacuum pump which is often considered a "maintenance-free" pump.
A complete Mason jar is composed of a tempered glass jar, a flat self-sealing lid, and a metal band. [20] The jars are made with either a wide mouth (3 inches (76 mm)) or regular mouth (2 + 3 ⁄ 8 inches (60 mm)) opening. They come in a variety of sizes, from 4 ounces to a gallon. The half-gallon size and larger are not recommended for canning ...
Mason's innovation was a square-shouldered jar with threaded screw-top, matching lid, and rubber ring for an airtight seal. Mason's easy-to-use, re-usable jars made home canning popular among American settlers, homesteaders, and even in urban homes. Most Mason jars were manufactured by competitors after his patent expired in 1879.
This page was last edited on 23 October 2014, at 15:22 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The Kilner Jar was originally invented by John Kilner (1792–1857) and associates, [4] and made by a firm of glass bottlemakers from Yorkshire called Kilner which he set up. [5] The original Kilner bottlemakers operated from 1842, when the company was first founded, until 1937, when the company went into liquidation.
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