1, conductivity: the surface of real gold foil can conduct electricity, which can be measured by multimeter. Not fake gold foil.

2. Corrosion resistance: the real gold foil has strong stability and can resist the corrosion of general strong acid and alkali (such as glue), but the fake gold foil is not.

3, ultraviolet lamp irradiation: purple has a high content of real gold, yellow and red, and the content is ok. White is fake.

4. Color discrimination: From the color point of view, real gold foil has the noble color of gold, with red and yellow color and strong gloss.

5. Observing through the light: If you look at the light with a single gold foil, the real gold foil is blue-green and the fake gold foil is gray-white.

6. Tested by the Gold, Silver and Jewelry Testing Center. This method is the most accurate.

Due to the different quotations from dealers all over the country, the specific prices vary from region to region.