k gold jewelry is discolored, what should I do?

As k-gold jewellery is more and more accepted, purchased, and worn, the accompanying problems will follow. Many friends will find their k gold jewelry worn for a long time, and the color has changed. What is the reason for this? How can we make the restoration of the previous colors? Today, Xiaobian will give friends a popular science!

k金首饰

Why gold jewelry will turn white

The whitening of gold jewellery is related to the concentration of Hg in the environment - gold jewelry comes into contact with substances containing Hg and reacts with it to produce a white gold-mercury compound. It exists mainly in the form of liquid and gaseous in our lives. (Chemical principle: gold amalgam has better wetting ability to Au than many metals, because Hg can selectively wet Au and diffuse into it, and can enrich the trace amount of Hg in the air. With the increase of temperature, Hg direction The deep part of Au gradually diffuses to form Au2Hg until it finally forms Au3Hg solid, ie gold amalgam, which is non-toxic.)

There are several possibilities for whitening gold ornaments

1. Mercury in the environment

2, gold jewelry encountered mercury

3. Cosmetics contain mercury

The first two are accidental, the probability is not big, but the third case is very common. Most women use cosmetics that contain whitening mercury. Gold jewelry absorbs trace amounts of mercury. Over time, gold jewelry appears white.

Where is there "mercury" in your life?

Mercury thermometers, barometers, vapor lamps, sphygmomanometers, etc. commonly used in life are made of mercury, cosmetics (Hg has freckle and whitening function), drugs, fungicides, shower gels, perfumes, hair gels, air, fluorescent tubes, disposable dry batteries. There is also mercury in the moisture-proofing agent. If you do not pay attention to contact with gold products, gold amalgam will be formed. Therefore, the surface color of the gold product becomes white, and the texture becomes brittle. If the area is large, it will be broken on the ground.

How to restore the white gold jewelry to its original appearance

1. Take the white gold jewelry to the local gold shop and heat it with a professional musket. Because the melting point of mercury is very low, in the heat treatment, the mercury will immediately evaporate, so that the gold jewelry will restore its original appearance.

2, first take warm water (40-C) 1000 ml, then add 200 ml of glacial acetic acid to make an aqueous solution, then put the gold jewelry into the cleaning solution for 10 minutes, then brush with a brush, and finally rinse with water. Or you can gently scrub with a soft brush and hot water. It is best to use a cotton wool ball to pick up soapy water and scrub with absolute alcohol. The gold jewelry thus cleaned will also become very beautiful.

Precautions:

1. Never use a lighter to burn.

2. After processing, it does not affect the original color of the goldsmith.

K gold jewelry discoloration

18k gold is an alloy that is smelted together with 75% gold and 25% other metals. Since 25% of other metal components are different, 18k gold has different colors. For example, 18k rose gold is a red rose gold that is added to 25% of copper, zinc and other metals. In theory, 18K gold will not change color, but 18K white gold is not really silver white, always slightly yellowish white. Therefore, it will generally be coated with a layer of enamel to make it silver and white, usually said discoloration means this The layer is gold-plated and the original color appears, so the 18K gold is only 18K white gold. If you are exposed to strong chemicals such as strong acids and alkalis, detergents, cosmetics, etc. Or when rubbing against other hard objects, different degrees of wear will occur. When the coating is worn, the true color of the metal is exposed, and a yellowish white color appears.

K gold jewelry is made of gold and other metals, and has strong antioxidant properties. If the K gold jewelry is coated on the outside, it will take a long time to wear because the coating looks like discoloration. It is not discoloration, but reveals the base metal inside.

It is normal to have discoloration. As long as it is a product that has passed the quality inspection, it should not be a quality problem. If discoloration occurs, you can go directly to your dealer or the relevant professional jewelry agency to do the maintenance, and then re-clean the plating is no problem. But still pay attention to the following points during the wearing process:

1. When buying k gold jewelry, choose the type of k gold correctly. Jewelry generally chooses 18k gold.

2. Since k gold is sensitive to other chemicals, do not wear it if it can be exposed to chemicals.

3, when K gold is stored, it should be stored separately from other jewelry, scratches appear, and it is more prone to discoloration.

How to clean 18K

1, alcohol and soap cleaning, use a soft cloth dipped in soapy water and the hotel rub, do not use particles such as toothpaste, so as not to scratch the appearance, a week of scrubbing is very bright.

2, ammonia soak, 18K gold necklace is dirty, soaked in ammonia water for one night, you can wash away the dirt, pay attention to the concentration is not too high, so as not to corrode the protective film.

3, alcohol lamp baking, often the appearance of the necklace has white spots, mainly because the use of some tribute cosmetics, stained on the surface caused by the tribute to melt at high temperatures, then gently wipe with a soft cloth.

4, you can use the old toothbrush with a neutral cleaning solution or a commercially available jewelry cleaning solution to lightly brush the bottom of the pedestal, as well as the crevices at the diamond, otherwise the gems will be tarnished because of the overall transparency.

The cleaning of the 18k gold necklace is necessary, but it is important that we pay attention to the maintenance when we are wearing it, so that it will last longer. The maintenance of 18k gold necklace is similar to the maintenance of other 18K gold jewelry such as white gold ring. 18K gold necklace should be stored separately. Avoid contact with chemicals, avoid rubbing and colliding with hard objects, do not wear when doing housework and bathing. 18K gold necklace, because women need a certain amount of makeup and perfume every day, pay special attention, these must be done before wearing 18K gold necklace.

The above is the knowledge about how to deal with k-gold discoloration and discoloration after sharing with the friends of China Jewelry Merchants.com. To learn more about jewelry, please pay attention to China Jewelry Merchants Network.

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