Water bath canning is a method of filling jars with food, covering them entirely with water, heating until boiling at 100 degrees Celsius and keeping that 5 to 85 minutes according to the food. It genuinely is an easy process although it seems heavy when you read about it, after one or two attempts it simply becomes usual.
Times for water bath canning usually count for heights at or under 1,000 feet above sea level. At sea level you boil typical jars during 5 to 15 minutes, although 5-minute times now less commonly appear in recipes. The duration ranges according to size of jars, kind of preserve and height if necesary.
How to Do Water Bath Canning
Half-pint jars of 8 ounces require 10 minutes. For bigger add 5 minutes each step, so 16-ounce require 15 minutes. Pints and half-pint jars boil the same long.
Jams and jellies almost always go in pints or half-pint jars, so that quart jars do not matter for them.
Most berry fruits, apples and apricots need boil to kill their natural spoilage. You process them in boiling water bath for 10 to 30 minutes. Jams, tomatoes, apples, pears and other high-acid foods boil only 10 to 40 minits.
Most pickles and relishes process in water bath for 10 to 20 minutes.
Recipes for water bath canning say: “process for 10 minutes”. The time does not start before the full jars are in the water and that again boils strongly. The jars must stay 1 to 2 inches under the water whole time.
A big deep covered pot, that lets water be 1 to 2 inches above the jars with space for bubbles, also works.
Canning bases on precise science. If food as salsa cooks thick, it flows slowly and warming in jars can differ. It then requires longer unknown time to reach safety.
Over-cooking happens if jars warm quickly before the water boils, which gives bad taste or texture, especially at tender foods with short times as jam or pickles. The main danger is not removing bacteria causing botulism. For high-acid foods it is needed to submerge the tins in hot water for enough time to eliminate thatrisk.