There are two home canning food methods pressure canning and water bath canning. Both pack ingredients into sterilized jars, then put them through a heat process (either by water or pressure) to kill harmful organisms and provide a vacuum seal. The process locks in freshness, keeps out bacteria and oxygen, and slows spoilage. Which method to use depends on the ingredients you're using. Pressure canning works best with low-acidity foods (like meats, soups, and vegetables). Meanwhile Water bath canning is recommended for high-acid foods only (like pickles, preserves, and certain fruits). Water bath canning can only heat foods to boiling point (212ºF/100ºC) – that’s enough to preserve high-acid foods. Low-acid foods require higher temperatures (around 240ºF/116ºC) to adequately kill harmful bacteria and eliminate the risk of botulism – that’s why pressure canning is required for them. A LIST OF ACIDIC FOODS To be safely canned, the food needs have a pH level of 4.6 or lower. So...