Canning with water bath
While canning tomato sauce today using the water bath method, three lids "pushed outward" while in the water bath. After they were removed at the end of the canning time, they all seemed to seal, but still have a dent where they were pushed out. What caused this and is it safe to used this sauce?
Best Answer
The cause of the lids bulging during processing is pressurized air trapped in the jar. This happens when the lids are too tight (not leaving sufficient head space can also be a factor). The bands should only be finger tight - From FreshPreserving.com
CLEAN mason jar rim and threads of jar using a clean, damp cloth to remove any food residue. Center lid on jar allowing sealing compound to come in contact with the jar rim. Apply band and adjust until fit is fingertip tight. Place filled jars in canner until recipe is used or canner is full. Lower rack with jars into water. Make sure water covers jars by 1 to 2 inches.
Creased or dented lids have a high failure rate, as such, storing them on the shelf would not be considered safe.
To be safe, the jars with buckled lids can be reprocessed with new lids within 24 hours, refrigerated and treated as if open, or the contents could be frozen.
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How long do you do a water bath for canning?
If the water does not cover the jars by 1 to 2 inches, add boiling water as needed. Bring to a rolling boil, cover the canner and boil for 10 minutes if using 4-, 8- or 12-ounce jars or for 15 minutes if using 16-ounce jars. (Check individual preserve recipes for more specific processing times.)What can be canned by water bath?
Water Bath CanningWhat foods Cannot be canned in a water bath?
Some foods are not suitable for home canning because the product itself prevents the destruction of harmful microorganisms during the canning process....Very Dense Purees- Pureed or mashed pumpkin or winter squash. ...
- Pureed cooked dried beans (refried beans). ...
- Mashed potatoes.
How much water do you use in a water bath for canning?
Before you start preparing your food, place canner rack in the bottom of a boiling water canner. Fill the canner half full with clean warm water for a canner load of pint jars. For other sizes and numbers of jars, you will need to adjust the amount of water so it will be 1 to 2 inches over the top of the filled jars.Water Bath Canning 101 | Easy Food Preservation
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