To clean the dust and scale of gold jewelry, the easiest way is to gently scrub it with a soft brush dipped in hot water. It is best to scrub it with absorbent cotton balls dipped in soapy water and anhydrous alcohol. Never use abrasive particles (such as toothpaste, polishing paste, fine sandpaper or fine sandpaper). ) avoid the loss caused by reducing the weight of gold jewelry.

Step 2 wash gold jewelry

When washing gold ornaments, first put the gold ornaments into the 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 gold jewelry, you should also maintain the hasp switch.

3. Removing white spots on gold jewelry

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 time, you must not scrape with a knife or polish with sandpaper. As long as the jewelry with white spots or whitening is baked in the fire and wiped with a soft cloth, the original luster will be restored.

The dirt on the surface of gold jewelry is clean.

When the surface of gold ornaments is stained with dirt, it will darken the color. At this time, you can use warm water of 30-40℃ to wash the developing powder of developing photos into developing solution, and then dilute it with twice as much water. Put the gold jewelry with dirt in it for 4-6 minutes, then brush it off with a soft brush and rinse it with clear water several times. If a good woolen cloth is dipped in nail polish, gold jewelry will be brighter.

Soaking and cleaning

First take 1000 ml of warm water (40℃), then add 200 ml of glacial acetic acid to make an aqueous solution, then soak the gold jewelry in this cleaning solution for 10 minute, then brush it with a brush, and finally rinse it with clear water. When you don't wear gold jewelry at ordinary times, put it in a box, and don't put it with other metals, which is easy to wear.

Gold jewelry refers to jewelry made of gold as the main raw material. The chemical symbol of gold is Au, with a specific gravity of 17.4 and a Mohs hardness of 2.5. Gold ornaments can be divided into pure gold and k gold according to their gold content.

The gold content of pure gold jewelry is above 99%, and the highest can reach 99.99%, so it is also called "99 gold", "all gold" and "red gold". In order to overcome the shortcomings of gold, such as high price, low hardness, single color, easy wear and delicate pattern, some other metal elements are usually added to pure gold to increase the hardness of jewelry gold, change its color tone and lower its melting point, so that gold alloy jewelry with different colors and obviously different gold contents appears, and is marked with the word "Kai".

K-gold system is an internationally accepted standard of gold measurement. The complete characterization of K-gold is "K-gold", which gives K-gold an accurate gold content standard, thus forming K-gold jewelry series.

I. Gold protection

1. In order to protect the luster of gold jewelry, you can coat it with a thin layer of nail polish.

2. If there is a black silver film on the surface, you can make a "gold cleaner" with 2g of salt, 7g of baking soda, 8g of bleaching powder and 60ml of clear water. Put the gold jewelry in a bowl, pour the detergent, take it out after 2 hours, rinse it with clear water (preferably not hard water), bury it in sawdust to dry, and then wipe it with a soft cloth.

3. Ring with gemstones Roll a piece of cotton with popsicles or matchsticks, soak it in the mixed solution of toilet water and glycerin, scrub the gem and its frame, and then polish the ring with flannel. Never scratch with sharp objects such as blades.

4. Salt and vinegar are mixed into a cleaning agent, which can be used to wipe pure gold jewelry, making it durable.

5. Toothpaste wiping or scrubbing with hot rice soup can also restore luster.

6. Scrub with ammonia.

Second, identify adulteration.

1. Does gold have white highlights?

Cut the gold bars or jewelry with scissors, and observe the section with a magnifying glass. If you see white bright spots, because gold and iridium can't blend together, it means that gold is doped with iridium.

2. Measure the specific gravity.

First, measure the weight of a pure gold bar with a balance, then put the gold bar into a measuring cup and pour water to drown it. Then put the detected gold bars into a measuring cup and observe whether the scale of water rises or falls. As long as there is a change, it means that gold bars are not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in gold jewelry.

True blue will never stain.

Put gold bars or gold jewelry on the fire for a period of time and observe its changes. Because iridium will combine with oxygen in the air to produce oxidation reaction, gold bars with insufficient purity will turn gray; And pure gold will appear bright red after being baked by fire. However, this method may have some damage to jewelry.

References:

Baidu encyclopedia-gold jewelry