With the long history of preserving food in jars, it was inevitable that many of the methods and practices would change over the years as new knowledge came to light and better supplies became available. But, with the trend of returning to the old ways that many homesteaders and preppers have adopted, unfortunately some of the gains in safety made in recent times have been rolled back. I don't want you to get me wrong. I am all for getting back to the lost ways of the past when life was simpler and people were more self reliant. But, when it comes to canning safety and avoiding food borne illness, the old ways are not always the best ways. Take for instance the return to the practice of inversion canning to seal jars. I addressed this in detail in another post, here and the reasons why this is not a safe practice no matter what your Grandma said. Another old practice I have seen some new canning enthusiasts make reference to is using flour or cornstarch to thicken a r...