startAbout UsFor ConsumersFor FoodserviceFor Educators

Frequently Asked Questions

Search Knowlege Base

in


Home | Category: Canning -- Miscellaneous


Canning -- Miscellaneous

What causes jars to break in a canner?

Rating: 100

Breakage can occur for several reasons: 1. Using commercial food jars rather than jars manufactured for home canning, 2. Using jars that have hairline cracks, 3. Putting jars directly on bottom of canner instead of on a rack, 4. Putting hot food in cold jars, or 5. Putting jars of raw or unheated food directly into boiling water in the canner, rather than into hot water (sudden change in temperature-too wide a margin between temperature of filled jars and water in canner before processing). Source: Original FAQ posted at http://128.192.83.157/faq/FAQ_home.php

Not UsefulVery Useful