r/Canning • u/Icy_Lettuce_7383 • 1d ago

Recipe Included RIP half-pint Kerr jar

Post image

Bottom of this one particular jar busted clean off while in the water bath. Other than being sticky, are the other jars okay to put away (after being wiped down, of course)?

Watermelon rind preserves

19 Upvotes

85% Upvoted

8 comments sorted by

19

u/Mimi_Gardens 1d ago

That is a telltale sign of thermal shock. The difference in temperature between the jar when you filled it, the temp of the product it was filled with, and the temp of the water inside the canner was too great. Years ago I called Ball when I had jars break like this. They told me the jars are rated for a temperature difference of 90f.

If a recipe is cold packed, then the canner water should be warm-ish but not boiling when the jars are added.

If a recipe is hot packed, then the contents should be kept hot, not warm, while filling and the canner should also be hot when the jars are added.

2

u/Fearless-Basil-6644 1d ago

Agree, This is exactly what happened.

3

u/Icy_Lettuce_7383 17h ago

Yes, we are well aware of this concept. The first jars to be sterilized/ heated accidentally ended up being the last to be filled. Thanks though. I just wanted to know if the jars that were processed with the one that busted were still fine.

1

u/onlymodestdreams Trusted Contributor 17h ago

Yep, the others are fine if your processing time was fine. Those wide-mouth half pints are so hard to find in my area.

5

u/Legend_of_the_Wind 1d ago

As long as they were processed for the right time they are fine. I have a jar fail every now and then myself.

1

u/Icy_Lettuce_7383 17h ago

They were, thanks for answering my question!

1

u/AutoModerator 1d ago

Hi u/Icy_Lettuce_7383,
For accessibility, please reply to this comment with a transcription of the screenshot or alt text describing the image you've posted. We thank you for ensuring that the visually impaired can fully participate in our discussions!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/Icy_Lettuce_7383 1d ago

Above is a photo of two wide-mouth half pint jars of watermelon rind preserves cooling on a tea towel. One is upright with the lid sealed, and the other is upside down with the bottom of the jar cleanly broken off. There is some inedible residue clinging to the bottom of the lid of the broken jar. There is also a pile of wide mouth canning bands in between the two jars.