has the very useful property of being one of the most highly ductile metal
s in existence. 5000 or more years ago it was discovered that small chunks of gold could be repeatedly hammer
ed and flatten
ed until an extremely
thin gold foil remained. This foil is commonly called gold leaf
. Modern gold leaf manufacture generally employs a high-precision rolling mill
that can create a gold foil
of 0.1 microns in thickness. This is *very very* thin.
Gold foils are used frequently for decorative purposes (Gilding), beam targets for particle physics, and as a gimmick in Goldschlager.