Dating ball fruit jars

05-Aug-2017 09:55 by 3 Comments

Dating ball fruit jars

Donner received a Mensa scholarship in 2006 while attending California State University, Fresno.She holds a Bachelor of Arts degree in liberal arts and a multiple-subject teaching credential.

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Colored examples of any jar early or late will bring a handsome price at auction. Until the invention of a screw-top with a rubber seal, the most common means of sealing jars was with wax. Colored pontil examples, while rare, are known in a variety of colors with cobalt blue being the top of the line.

John Mason invented and patented the process for cutting a thread onto the lip of glass jars, as well as a corresponding thread inside zinc lids, which could then be screwed tightly onto the jars.

A rubber ring tucked inside the lid created the seal necessary to preserve the contents.

Categorizing and dating can be challenging though, with the extensive range of styles and colors produced.

The better known styles include: Perfect Mason, Ideal, Sure Seal, Improved and Special.

Some people are introducing irradiated (exposed to radiation) jars to the market which have been artificially colored in dark browns or purples.

Some collectors have been fooled into paying large amounts of money for these altered jars. European storage jars often date into the 1600-1700s but the modern fruit jar, as found in this country, began to appear about 1840-1850 with the introduction of cork and wax seal jars and their tin top cousins.The development of a suitable closure which would prevent spoilage, be reusable and be economic proved challenging but the effort resulted in a great variety of odd closures which attract the big dollars from Fruit Jar collectors today.The size of the jar mouth was later reduced and a smaller lid was made to further conserve metal and allow homemakers to reuse the jars.Although antique Ball jars are fairly easy to identify with the “Ball” name scrawled across the jars, dating an antique Ball jar can be a little trickier.If you want to learn how to date your Ball fruit jars, click the link below: Balljars.