hawgrider
03-07-2016, 06:56 AM
Questionable Cans
Intact canned foods may last up to 10 years under ideal storage conditions, but what about the funny looking cans? The dented and dinged cans may still be fine, and there’s an easy way to check. The canning process creates a weak vacuum inside the container. This means that air should be sucked in when the can opener first pierces the lid. If you place a few drops of potable water on the lid, then place the can opener on that spot and squeeze – the drops should be sucked into the can when the seal is broken. If the water blows out and away, the can was under pressure and should not be used. The conditions to produce botulinum toxin is one of the reasons why a can may build pressure, and even a tiny amount of this toxin can lead to a fatal case of botulism.
http://www.outdoorlife.com/blogs/survivalist/expired-or-edible-how-tell-if-scavenged-food-and-drink-still-safe-consumption
Intact canned foods may last up to 10 years under ideal storage conditions, but what about the funny looking cans? The dented and dinged cans may still be fine, and there’s an easy way to check. The canning process creates a weak vacuum inside the container. This means that air should be sucked in when the can opener first pierces the lid. If you place a few drops of potable water on the lid, then place the can opener on that spot and squeeze – the drops should be sucked into the can when the seal is broken. If the water blows out and away, the can was under pressure and should not be used. The conditions to produce botulinum toxin is one of the reasons why a can may build pressure, and even a tiny amount of this toxin can lead to a fatal case of botulism.
http://www.outdoorlife.com/blogs/survivalist/expired-or-edible-how-tell-if-scavenged-food-and-drink-still-safe-consumption