You should not in most cases. Canning foods is really a science of combining specific amounts of ingredients to achieve a product that meets a necessary ph level required to preserve the food. If the ph level is not acidic enough the food will develop botulism and can kill you. It is not always easy to detect the presence of botulism in food so following recipes that have been tested in kitchens approved by the USDA is very important. Please do not experiment with canning foods.
Freeze it at a temperature less than 0. -7 is the best, I'd say. This is an old medieval method. If it's meat, you can also put salt on it to preserve it.
The only rule is use a pressure canner.
Following are the items needed to begin canning at home: water bath canner, pressure canner and cooker, canning rack, jars, jar lifter, magnetic lid lifter, wide neck canning funnel. In addition, there are canning kits available that make obtaining materials easier.
to keep excess air out of the can
Yes you can, follow your canner's instructions for canning acidic fruits and jellies.
A water bath canner is amongst the more popular canning devices for beginners as it is easier to use. If you are a beginner you can look here on tips for canning and why canning is better as opposed to other methods such as freezing. http://www.backwoodshome.com/articles/clay53.html.
The USDA Complete Guide to Home Canning states that green beans and wax beans can be processed in a hot water bath or hot pack method using a pressure canner. Refer to Guide 4 of this USDA canning guide, it is titled "Guide 4 Selecting, Preparing, and Canning Vegetables and Vegetable Products". The guide (all parts) are available as download in a PDF file format.
Canning or home canning is preserving fruits and vegetables at home in jars with lids that seal to keep them fresh. Canning is used to preserve any foods. Based on the food either a pressure canner or water bath canner are used. A pressure canner is just that, a canner that preserves food under pressure. This is used for meats and low acid vegetables - green beans, corn. A water bath is used for tomatoes and fruits in a syrup - plums, peaches, pears, raspberies. STRICT guidelines MUST be followed to use the proper procedure for the proper food to avoid salmonella, botulism, etc. If in doubt, freeze it. Canning Food used to be called "Putting Up" food. The common method was to boil the food (usually fruit or vegetables) in "Mason Jars" using the cooking process to force the air out of the jar causing a vacuum. This allows the food to remain edible for a long period of time.
Depending on the size of the cans, a canner might be able to fit multiple cans each inside one another all together in one large can. However, a canner might be canning peas or beans or octopi, so depending on his skills and workforce, he may be able to can many cans.
The general canning steps include reviewing procedure and equipment, washing canning jars using hot sudsy water,filling canner with water,and placing hot jars on cloth towels to avoid slippage while filling.
Yes, using a pressure canner to can your own food is a great way to save money. This is especially true if you have food that would go to waste if you don't can it.
If you are only planning on making jams then a simple pot would do, however if you will be canning veggies or other low acid foods you may want to purchase a canner. A good canner to try is the Presto Pressure Cooker. It is user friendly and more convient while being affordable.
The canning process is to preserve the food in the can. Sterilization is the process of killing bacteria that is normally heat resistant.