"White", "Red", "Black"? Is it "fake gold"?
Many people prefer gold jewelry because they think that gold jewelry will not change color, but, you know, in certain circumstances, gold will also "rust". What is the reason? Is it to buy "fake gold"? Gold has properties that are stable and not easily oxidized. However, in daily life, various household items contain various chemicals, some of which are easily attached to gold after contact with gold, such as mercury, chlorine, lead and sulfur. Things and so on. When these chemicals are oxidized, they will discolor the gold jewelry or make the color dim. This is the common gold "rust". Common gold "rusting situation" Turn white Gold spots sometimes appear white spots, especially gold jewelry. The appearance of white spots is most likely because women did not pay attention when using cosmetics containing mercury, resulting in long-term exposure of white jewelry to cosmetics. Because when gold encounters mercury, it will react with each other to form a white gold-mercury agent. In addition, if gold products are worn at the same time as platinum and silver jewellery, their surface will also produce white spots after a long time of friction. At the same time, gold can easily turn platinum into yellow, which affects the color of platinum. For the white spots that appear in this situation, you can use a thick cloth (such as canvas) to rub hard to slow down the "symptoms". Of course, it is better to ask the professional to re-plan the light with an agate knife to restore the gold. Blackened Gold jewelry is easy to turn black after contact with lead. Some cosmetics or hair dyes contain trace amounts of lead, and gold encounters black lead. In particular, the sunscreen cream used by Ms. Amy in summer has a high lead content, which is most likely to cause this phenomenon. The reaction of lead and mercury to the discoloration of gold is called “lead-mercury reactionâ€, and professionals can use the jewellery processing gun to heat it, so that the gold jewelry can be restored to its original form. Of course, it is best not to wear gold jewelry when applying cosmetics or dyeing hair to avoid future problems. The blackening of the gold necklace is mainly at the junction of the ring and the ring. Because the ring of the necklace and the edge of the ring need to be welded, welding is required. The welding grades of the manufacturers are not necessarily the same. Some of the fluxes in the flux are not high. Such a necklace is sweating after a period of use, especially in the summer. After soaking, blackness will appear. For the black caused by the flux, there is usually no good way to restore the golden color unless the entire necklace is re-forged. Redden The completion of the production of gold products requires a lot of complicated processes. In these complicated processes, their working environment cannot be in a vacuum environment, so it is possible to encounter dust and impurities in the air at a certain point. The condition attached to the blank of the product. These impurities continue to adhere to the gold without being tempered or pickled, and may become erythema after a period of storage, causing the gold to "rust". In addition, the surface of gold jewelry often has irregularities. If iron powder or iron filings enter these places, it will easily form red iron oxide, which is true rust, after a long period of contact with air and water. For reddish gold products, the best way is to get a professional goldsmith shop to wash with dilute acid. In this way, in order to protect your gold jewelry from "rusting", we must pay attention to the following two points: 1. When you go swimming in the swimming pool, try not to wear it; 2, try to avoid gold and perfume, cosmetics contact.
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