Did you know... Mason JarsPosted June 26 2013
Kicking off our “Did you know…” series, we write about Mason jars— who invented them, who makes them today, why they vary in color, and what those darn numbers mean…
So let’s dive into it, shall we?
The name came from John Landis Mason who originally designed and patented a screw finish for a glass jar, enabling the invaluable airtight seal. He was issued a patent for it in 1858, giving him sole rights for the next 14 years. It was eventually extended for 7 more years, finally expiring in 1879. Once expired, the details of the design were released to the public, and various glass manufacturers began legally making jars similar to Mason’s. To take advantage of its popularity, manufacturers put wording on their jars and marketed them to indicate they were being made according to Mason’s patent, thus… “Mason jars.”
Who is Ball?
The Ball Brothers Glass Manufacturing Co. was one of the more successful companies that manufactured jars according to Mason’s patent. They began production in 1884 in Buffalo, New York, and later relocated to Muncie, Indiana, where their business really took off. Ball eventually established itself as a leader in the home canning industry, even publishing a fruit preservation handbook, the Ball Blue Book. Today Ball no longer makes fruit jars, and has instead shifted to the aerospace industry.
Why are some jars blue?
Sand used from the Lake Michigan area was largely responsible for the distinctive “Ball-blue” glass. Ball Corporation stopped making these in 1937, however they are now available again in the Heritage limited edition line, as this year marks their 100th Anniversary. Here are adorable pint-size dispensers we make with these new jars!
So the numbers…?
The numbers on the bottom of the jars once signified something, perhaps mold numbers. However, as moldmakers did not record them in a way that makes them meaningful to us now, they are pretty useless in determining the age of a jar.