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

MissouriFamilies.org - Food Safety

 

Quick Answers

 

 

What causes a lid that sealed to bulge or to come unsealed during storage?

 
Both bulging and loss of seal are signs of spoilage. If either of these occur, discard the food. It could be dangerous.
 

Spoilage organisms must be growing in the food and producing gas. The build up of pressure inside the jar results in bulging or loss of seal. Growth of spoilage organisms can be attributed to under-processing (product was processed by wrong method or too short a time) or to a hairline crack in the jar which permitted entry of organisms during storage.
 

Never taste home canned food when the lid has bulged or come unsealed.       
 

 

 

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