Gold foil is a kind of craft gold made of high technology according to the ductility and plasticity of gold. It can also be called priceless gold, which has the characteristics of conductivity and noble luster of gold. The gold foil made by the traditional technology takes gold bars with a gold content of 99.99% as the main raw material. After more than ten special processes such as chemical cleaning, tempering and foil cutting, it is golden, bright and soft, as light as a feather, as thin as a cicada's wing and less than 0. 12 micron in thickness. Gold foil is a traditional handicraft of the Chinese nation, which originated in the Eastern Jin Dynasty, matured in the Southern Dynasties and was popular in the Song, Qi, Liang and Chen Dynasties. Today, Nanjing Longtan area (Jiangning) is the birthplace of gold foil, which is said to have a history of nearly 65,438+0,700 years. The inscription on the tomb of Cixi in Dongling, Beijing is a typical gold foil product.