What led to the discovery/invention of Aluminium Foil
They decided that they needed something better but the same concept as tin foil. Tin foil is stiffer than aluminium foil and tends to give a slight tin taste to the food wrapped in it which was a major reason it was replaced by the aluminium foil. Aluminium is an easily worked metal which resists corrosion.
Tin Foil, as you can see they look the same.