There are three common gold necklaces: 24k, 18k and 14k. Generally, the higher the purity, the darker the color. Pure gold is yellow purple, 18K is yellow blue, and 14K is yellow red. If you want to choose a slim gold necklace, you'd better choose 18K gold, because a necklace with the same thickness, 18K gold is much stronger in fastness and wear resistance than soft 24K gold.
Cleaning of gold necklace:
When washing a pure gold necklace, first put the pure gold necklace into a container, then add water to the container, then add a small amount of ammonia water, then tighten the lid, shake it back and forth vigorously, and then take it out to dry. When wearing a gold necklace, you should also maintain the button switch and drop a little sewing machine oil on the switch regularly to prevent the micro-spring in the switch from rusting.
Remove white spots:
Because some cosmetics on the market contain a small amount of mercury (mercury), such as phenylhydroxy mercury, mercury dichloride, etc., gold jewelry will appear white spots or whitening after contact. At this point, you must not scrape with a knife or sandpaper. As long as the white or whitish jewelry is baked in the fire and then wiped clean with a soft cloth, the original luster of gold jewelry will be restored.
Developing powder wiping:
Dirt on the surface of gold jewelry will make its luster dim. At this time, the developing powder for developing photos can be mixed with 30-40 ~ C warm water to make developing solution, and then diluted with twice as much water. Soak the gold jewelry with dirt in it for 4-6 minutes, then brush it with a soft brush to remove dirt and rinse it with clear water several times. If a fine woolen cloth is dipped in nail polish and rubbed lightly, the jewelry will be brighter.