Analysis of making gold foil from gold

Gold foil is a kind of gold products. Gold is made into extremely thin slices, that is, gold foil, through a specific process. One or two (365,438+0.25 g) pure gold can be hammered into gold foil with a thickness of one tenth of a millimeter and an area of 65,438+06.2 square meters due to its good ductility and plasticity. That is, one gram of gold can be made into pure gold foil of about 0.5 square meters with a thickness of 0. 12um. The standard specification of gold foil is 9.33*9.33cm Other commonly used specifications are 8*8cm, 10.9* 10.9cm, 4.5* 1.5cm and 2.75*2.75cm.

The gold foil made by traditional technology takes gold bars with 99.99% gold content as the main raw material, and after more than ten special processes such as chemical cleaning, hammering and foil cutting, it is golden in color, bright and soft, as light as a feather, as thin as a cicada's wing and less than 0. 12 micron in thickness.

The process of making gold foil generally goes through twelve processes. They are: matching gold, melting gold bars, beating leaves, twisting, dropping gold knives, dipping gold knives, breaking gold knives, loading knives, pit kang, grinding, spreading and cutting gold foil.