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- #731
perchie.girl
RIP 1953-2021
Once its opened it has to be re processed. Commercial canning operations are able to Pressure Can Several hundred jars at a time.Why is that? I see jar's of spaghetti sauce on the shelves in store's that have the meat in them. That's the one's that I buy, and then add my own stuff to it when I do make spaghetti.
But the deal is once its opened microscopic dust spores and organisms come in even through the air you breathe. Botulism spores are in the soil and in our bodies as well as our gut.
Once you remove air and place them in a warm environment They thrive... and multiply exponentially. The only way to kill them is to bring the food up to a temperature of about 240 degrees. The only way to do that is to use pressure and in the form of steam in a pressure canner you can bring the temperature up that high. Essentailly Autoclaving the contents.
The manufacturer of All American Canners Also makes Autoclaves for scientific uses.
Any way... If its had meat and been opened and you want to save it Either bag it and freeze it or pressure can it.
Low acid foods require it.
High acid foods dont provide an environment for botulism to grow. Especially with water bath canning.
Foods with High sugar content are the same way. Though some will need added acid to ensure the process is good.
For what its worth Lemon juice has a higher acid content than vinegar. This is why The FDA recommends adding lemon juice on many recipes. Commercially produced lemon juice Is an Acid controlled product. So you can trust the acid content. Home grown or Store bought Lemons are a crap shoot.
This is why When you buy Vinegars in the store the acid level should be at 5% if you are going to use it for preservation of any kind.
There are all sorts of things going on with canning... Biochemistry, is big and has been researched for you in the form of many recipes that have been tested in the BioLabs in Universities.
deb