Logo (since 1999)
Food Articles, News & Features Section



Chef working

  You are here > 

HomeFood ArticlesSmart Shopping Tips >  Canned Food Defects


Culinary Schools & Cooking Classes
From Amateur & Basic Cooking Classes to Professional Chef Training & Degrees -  Associates, Bachelors & Masters.  More than 1,000 schools & classes listed for all 50 States, Online and Worldwide


FREE Food & Beverage Publications
An extensive selection of free magazines and other publications for qualified Food, Beverage & Hospitality professionals



See also: Canned Food Shelf Life & Date Codes; Can Sizes; Canned Food History; Food Safety Videos



How to Recognize Can Defects

"Never eat food from a tin can with bulging ends" was a maxim many grew up with. Bulging was one of several clues that might indicate contamination of food packaged in metal cans. Guidelines have been adapted for recognizing defects in cans made of plastic and other materials, as well.

The guidelines are:

Metal Cans

    * an obvious opening underneath the double seam on the top or bottom of the can
    * a can with bulging ends
    * a fracture in the double seam
    * a pinhole or puncture in the body of the can
    * an unwelded portion of the side seam
    * a leak from anywhere in the can

Plastic Cans

    * any opening or non-bonding in the seal
    * a break in the plastic
    * a fractured lid
    * a swollen package

Paperboard Cans

    * a patch in the seal where bonding or adhesive is missing
    * a slash or slice in the package
    * a leak in a corner of the package
    * a swollen package

Glass Jars

    * a pop-top that does not pop when opened (indicating loss of the vacuum)
    * a damaged seal
    * a crack in the glass of the jar

Flexible Pouches

    * a break in the adhesive across the width of the seal
    * a slash or break in the package
    * a leak at a manufactured notch used for easy opening
    * a swollen package

FDA Consumer magazine, Sept 1990
(From a chart for retailers developed by FDA and NFPA and published by the Association of Official Analytical Chemists.)




  What Is Greenwashing?   |   Alternatives To Toxic Cleaning Supplies   |   National Bulk Foods Week 2012   |   Fair Trade Your Supermarket   |   You Are What's In Your Shopping Cart   |   Recycling Plastic Wraps & Bags   |   A Matter of Trust   |  Canned Foods & Cooking   |   Canned Food Defects   |   Caveat Emptor   |   Chicken, Choosing Safe, Healthy Chicken   |   Food Labels That Deserve Your Dollars   |   Genetically Modified Food Labeling   |   Genetically Modified Food Identification   |   Labels, New Food Labeling Law   |   Lead In Reusable Grocery Bags   |   Penny Saved is a Penny Earned   |   Plastic Bag Bans   |   Plastic Grocery Bags, Biodegradable?   |   Shopping: A Method to the Madness   |   Storing Hard to Keep Foods   |   Supermarket Shenanigans 1   |   Supermarket Shenanigans 2   |   What's the Difference 1   |   What's the Difference 2  

Go to Top of page

  Home   |   About & Contact Us   |   Chef James Bio   |   Website Bibliography   |   |   Food Links  

Please feel free to link to any pages of from your website. 
For permission to use any of this content please E-mail: [email protected] 
All contents are copyright © 1990 - 2017 James T. Ehler and unless otherwise noted.  All rights reserved.  You may copy and use portions of this website for non-commercial, personal use only.
 Any other use of these materials without prior written authorization is not very nice and violates the copyright.
Please take the time to request permission.