Gold jewelry has always been the favorite of many people. So, the question is, how do you master some techniques to identify the jewelry you bought? Usually we see on the market that gold jewelry is equipped with the inspection mark of the relevant quality inspection agency. It will clearly indicate the gold content and weight of the jewelry, so you must look carefully when you purchase it.
Is there any easy way to identify the authenticity of gold?
Appearance
The surface of the gold jewelry must be bright and clean, with no obvious processing marks, no obvious sharp corners, and a smooth feel. There must be no pores, impurities, etc. on the surface. In addition, we must also carefully observe whether there are cracks, so as not to buy secondary processing jewelry.
Look at color
We often say that gold is "seven green, eight yellow, nine purple, ten red." It means that if the jewelry reaches 70% of the gold content, it should be yellow and yellow. If it reaches 80%, the color should be yellow. If it reaches 90%, it should be yellow and purple, and the gold content should reach 10%. It is red.
The higher the purity of gold, the darker the color will be.
Gold with a deep red-yellow color, with a purity of over 95%;
It exhibits light reddish yellow gold with a purity of 90-95%; it exhibits pale yellow gold; purity is 80-85%;
Showing a blue-yellow gold with a purity of 65-70%;
Gold with excellent greenish white light, purity is only 50-60%;
The gold is yellowish and white, and the purity is not even 50%.
(The following methods are only applicable to the local tyrants on the tall, generally do not follow the example!)
Look at hardness
In costume dramas, there is often such a plot. Some people use their teeth to bite gold to distinguish the true and false of gold. Pure gold is low in hardness and will leave a tooth print if bitten with a tooth. Therefore, when identifying pure gold, you can try its hardness. If the hardness is too high, it cannot be pure gold. (except 3D hard gold)
Listen to the sound
If the color is more than 99% of the real gold thrown on the hard ground, it will make a "bar bang" sound, no sound and no elasticity. The fake or low-quality gold sound is crisp and not dull, and generally gives a "dangdang" sound, the sound is sharp and sharp, and there is a residual sound, and there is a rebound.
Burn with fire
Burn the jewellery with fire and observe the color change after cooling.
If it is pure gold, the surface is still golden yellow after burning;
If the color is black, it is not pure gold.
However, be careful not to burn the jewelry when burning.
Tips: What kind of wash can gold jewellery shine?
1, dust removal
The easiest way to clean the dust and dirt of gold jewelry is to gently scrub it with a soft brush and hot water. It is best to use a cotton wool ball to pick up soapy water and anhydrous alcohol for scrubbing, but it is not available. Scrubbing abrasive particles (such as toothpaste, polishing paste, fine sandpaper or fine abrasive cloth) to avoid weight loss and loss.
2, the washing of gold jewelry
When washing gold jewelry, you should put the gold jewelry in the container, then add water to the container, then add a small amount of ammonia water, then tighten the mouth, shake it back and forth, and then remove it and dry it. When wearing gold jewelry, you should also maintain the buckle switch, and periodically drop a little sewing machine oil to the switch to prevent the miniature spring in the switch from rusting.
3. Removal of white spots in gold jewelry
Since some of the commercially available cosmetics contain trace amounts of mercury (mercury), such as phenylhydroxymercury and mercury dichloride, which are often found in spotted cream, white plaques or whitening may occur after contact with gold jewelry. At this time, it is not possible to use a knife or sandpaper to polish. As long as the white spots or whitening jewels are baked in the fire and then wiped clean with a soft cloth, the gold jewellery will return to its original luster.
4, developer cleaning
When the surface of the gold jewelry is stained with dirt, it will make the brilliance dim. At this point, you can use the developer powder to rinse the photo, and mix it with 30-40~C warm water to form a developer solution, then dilute it with water, and put the dirt gold jewelry into it for 4-6 minutes, then use soft hair. Brush the dirt and rinse it with clean water several times. If you use a fine woolen brush to remove the nail polish, the jewelry will be brighter.
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