鋁箔紙/錫箔紙的英文：Aluminium foil (入內詳細)

Aluminium foil, Pic CC-BY by wstryder

Aluminium foil is aluminium prepared in thin metal leaves, with a thickness less than 0.2 millimetres, thinner gauges down to 6 µm are also commonly used. (wikipedia: Aluminium_foil)

Aluminium foil剛好可以拆成鋁、箔兩個字來看：

Aluminium (鋁)
Aluminium (or aluminum) is a chemical element in the boron group with symbol Al and atomic number 13. (wikipedia: aluminium)

a light, silver-colored metal used esp. for making containers, cooking equipment, and aircraft parts (cambridge: aluminium)

foil (箔)
a very thin sheet of metal, used esp. for wrapping food. (cambridge: foil)


那為什麼會有錫箔紙的俗稱呢？
因為早期的確是用錫做的（錫箔 Tin foil），但因為錫味會留在食物上的缺點，現在市面上應該都是鋁製的了。