Dating old kerr canning jars

Labels are commonly used to identify the contents of glass jars with pertinent information to the items such as freshness dates for. Food canning works by creating enough heat to kill all organisms and enzymes that could spoil food and sealing out any new ones from entering.

e How Food, Rachael Ray and her Buddies want to show you how to get more out of every day, every meal and. The earliest home canning involved a glass jar with a tin lid and sealing wax.

Jars that were free blown without the use of a mould were finished by hand.

These jars typically have a number embossed on the bottom called "mould numbers." It usually referred to the glass blower and his team.

The Kerr Economy and Kerr Self Sealing jars were developed in 1903 by Alexander H. It fit on top of a Mason jar and could be used with other canning jars. The finish on a fruit jar can tell you roughly about the date it was made.

Kerr, who founded the Hermetic Fruit Jar Company that year. If the finish on the base is smooth on the lip of the jar, it usually means the jar was machine-made after 1915.

Ball brand mason jars were originally produced in 1884 by the Ball Brothers Glass Manufacturing Company (now simply called the Ball Corporation). net there is a progression chart dating different jar styles from 1885 to the present. Kerr, Golden Harvest, Bernardin and Ball brands are presently all manufactured by Alltrista Corporation.

Kerr self-sealing jars and the Kerr Economy were created in 1903. Kerr also founded the Hermetic Fruit Jar Company in. The Kerr Economy and Kerr Self Sealing jars were developed in 1903. because authentic Mason jars are still being produced under the names Kerr and. Before company consolidations reduced the variety of canning jar brands, hundreds of smaller companies made their own versions of the canning jar types mentioned above.

Instructions Look for a ring of glass or a dark indention on the base of the jar.Look for indications of mold seams on the glass jar.The first glass jars were made without a mold, so if you do not find a mold seam, the glass jar may have been made before 1915.If you're ecologically minded, preserving your glass jars and lids to be used again is much easier than taking them to be. Mason jars were patented during the 19th century to. The parts were not re-useable because the sealing wax acted a bit like cement.Dating antique bottles requires knowledge of the evolution of bottle technology and the ability to research manufacturers and bottling companies. Embossed markings on glass jars, bottles and other containers can add considerably to their monetary value. Famous glass companies with histories that go back a century ago include prominent glass makers such as Baccarat in France and Waterford. Ball began manufacturing glass jars in 1883, followed by the Kerr Company. Mason jars, which are also known as Ball jars, have been used for home canning for more than 150 years. Most Valuable Ball Mason Jars; How to Date Kerr Jars;. Even so it was a step forward from earlier preserving methods of drying, pickling, salting and smoking and offered a way to preserve a greater variety of the summer’s harvest. Mason developed a way to cut threads into a metal lid. You will still find them commonly in antique stores.

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Glasses from this era were made from "soda glass," a blend of soda and silica. Ball had bought out many smaller producers over the decades.

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