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description: Dating > Dating blue mason jars
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# Dating blue mason jars

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A Primer on Fruit Jars by David Hinson. If you have any questions at all about Ball jars, please feel free to email me by clicking on the following link.\
&#x20;![dating blue mason jars](http://midwesternbelle.files.wordpress.com/2012/05/small-blue-mason-jar1.jpg)\


Their specialty was the manufacture of fruit jars. If you have a booth or know of anyone that has a booth at an antique mall you could try that. One thing that tends to confuse non jar collectors is how to describe a jar's size. The amber glass kept out the harmful effect of light rays on the contents of the jar. Colored jars were considered better for canning use, as they block dating blue mason jars light from reaching the food, which elements to retain flavor and nutritional value longer. An improper or failed seal or microbial growth will cause the dome to pop upward. Wire-bail styled-jars made by Ball at least stopped being made for canning use around 1962.

Atlas E-Z Seal is a type of Lightning jar. The views and opinions expressed on this blog are purely the bloggers' own. The cracking was a common problem with shoulder seal jars.\
&#x20;![dating blue mason jars](http://thedealyo.com/wp-content/uploads/2013/12/bluemasonjars.jpg)\


**Latest Blogs** - Best regards, David Hi Neva, your jar probably held some type of food product such as pickles or a tomato-based product. Interestingly, Putnam was living in San Diego at the time but it is not known if any California company made his jars glass.\
&#x20;![dating blue mason jars](http://2.bp.blogspot.com/-EoravJl8n5A/T3EOCweQcDI/AAAAAAAABGE/fl_zXG57tW8/s640/IMG_6471.JPG)\


The Kerr glass plants were bought by Ball Corporation in 1992. Kerr did not actually make glass from 1904 to 1909, but had glass made for them by other companies. In 1909 their first plant opened at Altoona, KS. I know that Ball, Kerr, and Hazel Atlas all made jelly jars in the US in their time. To my understanding these glasses were made from sometime in the 1920s through the 50s, they were very common in the 30s and 40s when many people also used them as drinking glasses, it would be difficult to date a specific jar beyond that range without more specific information on dating Kerr items, which I've always had difficultly finding. I had a link bookmarked but it seems to be broken now Jelly jars are meant to be sealed with wax and then capped with the metal cap to keep dust out. Wow, thank you, Moolie! I knew you were a treasure trove of information on canning jars. I'm sure the numbers on the bottom would help narrow that down further, for my specific jar. Thank you for the info about how the jars were meant to be sealed. I was wondering if they were supposed to be wax sealed, as the lid does not appear to screw on.
