Where did canned food originate?

               Many years before pasteurisation was discovered, the French inventor Nicolas Appert found a method of sterilizing foods by keeping them in glass Jars and heating them. It was actually a form of pasteurization as he heated the food to kill bacteria in it.

               Appert’s jars were soon replaced by cans made out of tin plate. Peter Durand received the first patent for the idea of canned food. First it was introduced in the UK, and later in 1818 it was introduced in the US.

              Initially cans were completely sealed except for a small opening knob on the top. Before soldering the food was heated to boiling point. Then the cans were reheated. The earlier versions of cans were not safe at that time. However, canning food was cheap and convenient. It gained popularity very easily.

Picture credit: google