Top best answers to the question «Why do mason jars crack in the freezer»
Why do mason jars break in the freezer? Non-tempered glass contains microscopic air bubbles that expand and contract as the glass is heated and cooled down, especially at extreme temperatures, like during canning and freezing. When those little air bubbles expand, they cause the glass to crack or even explode!
8 other answers
Why do mason jars break in the freezer? Non-tempered glass contains microscopic air bubbles that expand and contract as the glass is heated and cooled down, especially at extreme temperatures, like during canning and freezing. When those little air bubbles expand, they cause the glass to crack or even explode! Can you freeze chili in Mason jars?
Glass can break into tiny pieces, and it’s not worth feeding a loved one (or yourself!) a mason-jar-roulette meal. Unfortunately, your frozen jar is likely shattered, and therefore you’ll have to throw out the broken glass in your trashcan. However, glass is typically recycled via the single-stream method used in Philadelphia.
Leave Space Between Jars in the Freezer. For some reason, jars that are touching when placed in the freezer seem to break more readily, as well. This problem has another simple solution: just leave a little space between the jars when placing in the freezer. Ba-da-boom, ba-da-bing.
I’ve learned a few tricks to help keep my jars crack-free, so I think I can help you out. The quick answer is, what’s happening to cause your jars to break is called thermal shock. Basically, the glass is being asked to accommodate a too-rapid temperature change. As your jar is lowered into boiling water, the glass attempts to expand slightly.
Microwaving the broth or otherwise shocking the cold jars with heat might also be causing the cracking.But if the cracking is happening after you put the lids on and while the jars are in the freezer…I’m at a loss!
First of all, if the jars do decide to have an earth shatteringly good time in your freezer, the breaks tend to be clean and kept intact by the frozen liquid. I have had a glass jar break on me. When it broke, it cleanly split into three pieces.
Exposing mason jars to temperature fluctuations when they come out of the freezer can cause breakage. To safely thaw frozen jars, set them on a towel at room temperature. The towel will absorb the liquid that condenses on the outside of the jar as it thaws, saving you a mess.
When you are ready to use a jar of soup, here’s what you need to know as you thaw it in order to prevent cracking, because, yes, the jar can crack when going from an extreme cold temperature to a very warm one. There are generally 3 ways you can thaw a mason jar full of soup.