There are several kinds of gold foils, which vary according to the different gold content, yellowish with high gold content, and reddish with low gold content. Counterfeit gold foils are also on the market. We call them copper foils (gold foil imitations). The identification method is: the color of real gold is calm and soft, the color of copper foil is more dazzling than the color of the copper foil, and the color is not pure.
If you do not have experience through visual identification? There is a very simple method is: Randomly extract one, use a lighter to burn it, true gold is not afraid of the fire, and the copper foil will immediately turn black.
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