The gold-plated composition is a metal plus gold film, and the metal is mostly brass. It is the use of electrolysis principle, a layer of gold plating on the metal, a wide range of applications. Its gold-plated gold layer is very thin, easy to plate, low in cost, and has a certain decorative effect, but it is easily worn out and time cannot be sustained.

The gold-plated gold film should have a certain thickness, generally more than 10 micrometers, but the poor quality gold-plating cannot reach this thickness, and some even do not plate when only changing the color, which is not standardized. If the corners of the gold-plated article are rubbed on the clothes for a few moments, the fading of yellow will reveal the "natural" color, and the thickness of the coating must be insufficient.

The low price of gold plating has a certain degree of decorativeness, but it has only a temporary glory.

The gold package is to attach the gold foil to other metal surfaces and then process it into various decorations. This is cheap and gives people the same feeling as gold.

Its composition is that the inside is a copper or silver piece, and the outside is a 24K or 18K thin gold piece. Generally, the thickness ratio of the two is 10:1 or 20:1. Since gold only has a layer of gold on the surface, it no longer has a large density (feeling is not "sinking"); it is also widely used due to its low price. The pressure between gold and copper and silver is very good and it is generally not easy to disclose.

The gold package is sometimes easily mixed with K gold and pure gold, but its light weight makes it easy to distinguish between the two. Gold and gold plating have similar characteristics, but the thickness of the gold plating is very small, and the edges and corners are easily worn off to reveal the "natural" color, while the gold is not. In addition, there are often "1/10 24K", "1/10 18K", "1/20 18K" or "24KF", "18KF" and other words in the gold package, and it is also one of the important methods for identifying gold.