The traditional gold foil paper production process uses gold with a gold content of 99.99% as the main material, and is specially processed through more than a dozen processing processes such as polyester, pounding, and foil cutting, making it appear golden in color, bright and soft. It is as light as a feather and as thin as a cicada wing, and its thickness does not exceed 0.12 microns. Usually we can observe with the naked eye that real gold foil will show green to the light, and imitation gold foil paper cannot show green to the light; and real gold foil paper is much thinner than imitation gold foil paper. Real gold foil paper shatters when touched. The imitation gold foil paper is much thicker than the real gold foil paper. It cannot be broken by the touch. Real gold is not afraid of fire. It can be distinguished from the true and false under fire. The main raw material of the imitation gold foil is copper. Copper will form copper oxide through burning. Turns black, while real gold will not.　　 If we want to accurately measure the pure gold content of gold foil, we need to use special equipment, and we can also tell the difference through human eyes, there are 9 red, 8 yellow and 7 green. That is, gold content exceeding 90 is reddish, 80 gold is yellowish, and gold content 70 is cyan.　　 The production of gold foil paper has incorporated modern technology. The auxiliary materials (such as Wujin paper) and equipment used have been greatly innovated, and the production volume and quality have been greatly improved. Modern technology has carried forward the traditional gold foil craftsmanship, and has developed and designed new gold foil paper varieties, such as the use of high-tech laser light-engraving techniques to engrave and bronz the gold foil with a purity of 99%. It has a value preservation, personal collection, Memorial and appreciation value.