The discoloration or fading of 18K gold jewelry is closely related to human sweat. 99% of human sweat is water, and about 1% is waste and harmful substances in human body, such as chloride, lactic acid, urea, urea ammonia and so on. When these substances come into contact with silver and copper in K-gold jewelry, they will produce chemical reactions, producing silver chloride and copper sulfide, and present dark black chemical salts, which is the main reason for the discoloration of K-gold.

This chemical salt often falls from K-gold jewelry, polluting the wearer's skin and leaving very obvious black spots on the skin.

Some cosmetics also contain some fine hard particles, which can constitute another kind of dirt, thus wearing 18K gold jewelry. The factors of regional environment may also make gold jewelry lose its bright color. For example, in dry areas, the air contains a lot of fine dust, which will form a kind of human body sandpaper after being polluted by human body, which can grind 18K gold jewelry into extremely fine chips and appear local black stains.

Maintenance method

1. When wearing a diamond ring inlaid with 18K gold, try to avoid contact with chemicals.

The primary color of 18K gold is golden yellow, while white 18K gold is the color after electroplating. If articles containing chemical components (such as skin care products, hand sanitizer, vinegar, etc. ) frequent contact, the electroplating layer is easy to be corroded, exposing the primary color of 18K gold.

Therefore, please take off the diamond ring when removing makeup, and don't wear it for cooking, washing clothes or doing chemical experiments. Before doing these things, put the diamond ring gently in the jewelry box dedicated to the diamond ring.

2. Avoid collision or friction between the diamond ring and hard objects such as metal.

Although diamonds are hard, they may also have cracks. 18K precious metals such as gold and platinum will also be scratched due to friction, or extruded and deformed, resulting in an unsightly diamond ring. Therefore, when wearing a diamond ring, it is not advisable to do strenuous physical strength or exercise. This can not only wear elegant taste, but also protect the diamond ring from being damaged.

Reference to the above content: Baidu Encyclopedia-18K gold