Gilding is a decorative process in which a thin layer of gold is plated on the surface of an ornament to make it look like a gold ornament.
The gold layer has good ductility, easy polishing, high temperature resistance and good resistance to discoloration. Gold plating on the silver layer can prevent discoloration of silver; Gold alloy coating can be presented in a variety of shades, so it is often used as a decorative coating, such as plating jewelry, watch parts, artwork and so on.
The quality of gold plating depends on the thickness of the gold plating layer and the brightness of the gloss. The international standard for gold-plated jewelry is a good gold-plated jewelry coating thickness of 10 microns -25 microns, the general gold-plated jewelry coating thickness of 2 microns -3 microns, if in 0.18 microns below the plating of jewelry, it can not be called "gold-plated" and called "gold coating", it belongs to the cheap jewelry process.
Gold plating can be divided into the same material gold plating and heterogeneous material gold plating. The same material gold-plating refers to the surface of gold jewelry gold-plating treatment, the meaning is to improve the brightness and color of the jewelry. Heterogeneous material gilding refers to the surface of non-gold materials, such as silver gilding, copper gilding, meaning to replace the luster of the plated material with gold, so as to improve the ornamental effect of jewelry.