How can you tell how old a ball jar is?
So if you have some old jars, how do you know their true age? If you have a Ball jar, you can date most of them just by looking at the logo. Every few years, the Ball Manufacturing Co changed the logo and if you compare yours to a reliable chart, you know how old it is.
Which Ball jars are freezer safe?
Use only straight-sided mason jars and fill them to the freeze-fill line. On Ball and Kerr branded jars (which are made by the same mason jar manufacturer), the freeze-fill line is a thin line found just below the threads, about an inch from the rim.
What do numbers on bottom of Ball jars mean?
Many Ball mason jars have a number printed on the bottom of the jar, but this is a mold number that does not indicate the year of production. Rather, the mold number tells you where the jar was positioned on the glass-making machine that was used to produce it.
Why are Mason jars so expensive?
So why are Mason jars so expensive? We go through the trouble of growing our own produce, making our own preserves, and then all the cost savings is taken up by an expensive glass jar with a red checker lid.
Can you put Ball mason jars in the freezer?
Ball® makes mason jars specifically for freezing. They’re made with a straight shoulder. That means there’s no curve around the neck of the jar, which makes it easier for them to stand up to low temperatures and expanding liquids. Freezer-safe mason jars like these don’t curve in toward the lid.
Are Ball mason jars freezer proof?
Why Mason Jars are the Perfect Storage Solution Mason jars are a workhorse in the kitchen, and are the perfect simplified storage solution because they can be used in so many different ways. They’re durable, are plastic-free, inexpensive, and work perfectly in the pantry, fridge and in the freezer.
What does the number on the bottom of Ball Mason jars mean?
Why are some Ball jars blue?
Feeling Blue Those blue mason jars were mass produced until 1937 using sand from around Lake Michigan. It was that sand that gave the glass its blue hue.