What do the numbers on the bottom of Mason jars?
Not every jar has their manufacture date on the glass, but most have the patent date. There will be a large number on the bottom of your jar. This is the mold number, and unfortunately also has no relation to the manufacture date. These charts tell you the approximate decade in which your Ball jar was made.
How do you date a lamb Mason jar?
Ball Mason jars can be roughly dated using their logo. With this chart found on the Minnetrista website, it’s pretty easy to get an approximate date. The Ball jar on the left is dated between 1923 and 1933 because of the absent underscore.
What do the numbers mean on a ball Mason Jar?
Modern Ball mason jars are marked with many different numbers, and those numbers vary by the company which is manufacturing them under the Ball brand name. The numbers can refer to the plant location, the job or batch number and the date of manufacture.
Why do glass jars have numbers on them?
Ball jars were originally formed by professional glass blowers who were each supported by a small team of assistants. The glass blower would mark all of his jars with a number used only by him. This was done for payment purposes.
What are the colors of old mason jars?
Clear and pale blue are the most common colors, but jars of all colors were produced. Yellow and amber jars were common. Depending on what was used to color the glass, historians can also date the jars. Amber glass became popular in the 1910s, when there was a misconception that dark glass prevented spoiling.
When was the first ball brand mason jar made?
PhotoObjects.net/PhotoObjects.net/Getty Images. Ball brand mason jars were originally produced in 1884 by the Ball Brothers Glass Manufacturing Company (now simply called the Ball Corporation). The Ball brothers who owned that company began to make glass fruit jars when the patent on the Mason Improved fruit jar expired.
Clear and pale blue are the most common colors, but jars of all colors were produced. Yellow and amber jars were common. Depending on what was used to color the glass, historians can also date the jars. Amber glass became popular in the 1910s, when there was a misconception that dark glass prevented spoiling.
Ball jars were originally formed by professional glass blowers who were each supported by a small team of assistants. The glass blower would mark all of his jars with a number used only by him. This was done for payment purposes.
PhotoObjects.net/PhotoObjects.net/Getty Images. Ball brand mason jars were originally produced in 1884 by the Ball Brothers Glass Manufacturing Company (now simply called the Ball Corporation). The Ball brothers who owned that company began to make glass fruit jars when the patent on the Mason Improved fruit jar expired.
