Speaking of gold jewelry, we must all be familiar with them. They are no longer the darling of the nobles, and have been integrated into our lives. But have you found that some K gold jewelry is very shiny when it is new, but after a period of time, the color will fade, and some will not? Do you know why? Today I’m going to tell you what’s going on.
The wholesale jewelry gold jewelry we usually wear are solid gold, K gold, and gold-plated.
Generally, pure gold jewelry is not easy to fade, because the gold content is very high, and the chemical stability of gold is also very high, but after a long time, a thin oxide layer will appear on the surface, which does not look as shiny as the original. , will affect the original gloss. This is what we call “gold rusting”, but the process is very slow.
K gold is more complicated. Generally, K gold jewelry in my country is mostly 18K, but there are also many light luxury jewelry made of 14K gold, so we must pay attention to the logo when purchasing. 18K gold generally has three colors, white gold, rose gold, and K yellow, which is an alloy of 75% gold content and 25% other metals. Other metals include platinum, nickel, copper, silver, palladium and other metals. Manufacturers will adjust the composition and proportion of other metals according to the color required by the jewelry, and many manufacturers also have their own formulas. I mentioned earlier that the chemical stability of gold is very high, but the chemical stability of these other metals that are mixed is not necessarily high, such as copper, silver, etc., they will produce chemical reactions when they come into contact with air, sweat, etc., such as Usually silver will be dark, copper will be red, etc., so sometimes the K gold jewelry we wear will fade and fade after a long time.
Finally, let me say something about gold plating. Gold plating is generally a thin layer of gold plated on the surface of other metals. Silver gold plating, copper gold plating, etc. are more common in the market. Because the layer of gold plated is very thin, it is easy to wear and fade after wearing for a long time. . In some factories, if the electroplating process is not good, the color of the electroplating will turn red and white, and some even the uneven color plating will cause flowers. Therefore, gold-plated jewelry is generally cheaper.
What should we do if the jewelry fades? We can usually send the jewelry to the gold shop, and the gold shop will send the jewelry back to the manufacturer for re-polishing or electroplating, and your jewelry will be as shiny as new!