Letter Re: Food Preservation
Good afternoon, Hugh, Recently SurvivalBlog has presented several articles on food preservation, including extremely informative ones from your wife, Sarah. I’ve become curious about a few things: Is there a minimum vacuum level necessary for food preservation? (This assumes other factors, such as the lack of heat-based canning procedures are not necessary for preservation.) Are there advantages to purging air from a food container with nitrogen? If so, is there a recommended procedure for that? Does vacuum sealing after nitrogen purging offer additional advantages? You have tested and reported on a commercially available home freeze dryer; how much preservation time …