MU Extension MU Extension       University of Missouri    ●    Columbia    ●    Kansas City       Rolla     ●    St. Louis

MissouriFamilies.org - Food Safety

 

Quick Answers

 

 

All the jar rings were loose when I removed my canning jars from the canner. I tightened them all. When I went to store the jars, I noticed that none of them had sealed. What happened?


Retightening jar rings after processing causes a condition called "cut throat." The ring cuts right through the sealing compound leaving the enamel against the glass jar rim. Loss of seal usually occurs. Never retighten jar rings. Don't disturb canning jars for 12 to 24 hours after processing while seal is forming.

 

 

Barbara Willenberg, Nutritional Sciences, University of Missouri-Columbia 

 

 


 

 

Last update: Tuesday, May 05, 2009

 

 

 


University of Missouri logo links to http://extension.missouri.edu

Site Administrator:
mofamweb@missouri.edu
Copyright  ADA  Equal Opportunity


MissouriFamilies is produced by the College of Human Environmental Sciences,
Extension Division, University of Missouri