The authenticity of the gold can be referred to the following methods: 1. Seeing the color This can generally distinguish between pure gold, K gold, real gold, fake gold according to the different gloss and color of the gold. That is, gold is better yellow (yellow -red), and the color is more than 95%; the positive yellow color is about 80%; the blue and yellow color is about 70%; the yellow color is slightly gray and the color is about 50%. Therefore, there is a formula for "seven green eight yellow, yellow nine five red, yellow leucorrhea ash pairs of gold". For long -term gold jewelry, there will be a saying that "copper turns green, silver turns black, and gold will never change color". 2, 量 weight
D gold weight is about double the same volume of silver, lead, and tin. True gold has a feeling of falling on the hand, while copper or others only have a sense of heavyness without falling. 3, listening to the sound When the high -quality gold jewelry is knocked out or threw it hard, the dull and low sound of "click, click", there is no rhyme or elasticity, and K gold has sound charm. , Sound, elasticity, the greater the elasticity, the more the rhyme, the more the elderly, the worse the color. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
4, folding hardness The gold with high color, with large head needles or nails, can leave traces. More than 97%of the gold jewelry, after two or three times, wrinkles appeared at the bend, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; The jewelry is very hard when the bending is bent, and there is no fish scale pattern; the gold jewelry containing more impurities, the bend is twice or three times to break; When using this method, the width and thickness of the jewelry should be considered. The thick and width should be hardened, and the thin and narrow ones are softer. 5. Use the test gold stone to identify the color Procketing the golden jewelry on the test gold stone by using the determined gold and the test jewelry to determine the color of the gold jewelry through the contrast color. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.
The previous people used testing stones to determine the general content of gold. Testing gold stones are a mixed black mineral such as quartz -containing quartz and protein stones. Roughly color. Pure gold: shiny dark yellow, thick yellow; silver -containing gold: light color transformed micro -band -inflammatory green; gold containing gold greater than 25%: earth white; copper gold: deeper color, red color tone; silver copper containing copper; Gold: yellow; gold containing zinc, same, nickel: white gold.
With the improvement of everyone's living standards, gold jewelry has gradually entered the families of ordinary people. However, for many people, how to distinguish the authenticity of gold and falseness is not well understood. In this regard, I will share it here. Methods to teach you how to distinguish the authenticity of gold. . Visual inspection 1, check the official logo of gold. Generally, 999 or 990, or 10K, 18K, 22K, 24K. It is not considered lower than 10K, because the content of gold is too low. If you observe with a magnifying glass, you will see more carefully. 2, ancient gold jewelry will not have obvious official purity logos. 3, of course, there will be official signs of counterfeit gold jewelry, so further inspections need to be performed. 4, find obvious discoloration. Check the wear area of the golden surface, which is usually on the edge of the golden products to check the color change there. If the golden color disappears and becomes another color, then this product is just a gold -plated. . The bromine chemistry test 1. Put the golden products into the alcohol solution for a small meeting. 2. Pour a filter paper sperm solution. 3. At this time, the filter paper becomes gray -purple. 4, drop 4 drops of bromo -A reagent to the filter paper, if the filter paper becomes white, then this gold product is real gold. The test time takes 20 minutes. . Magnetic test This is a simple test, but it is not a sufficient proof to prove whether it is true gold. You can find a powerful magnet for testing. Gold is not a magnetic metal. If your product is attracted by magnets, it is enough to prove that this product is not gold. But you can't prove that it is gold because your product does not respond to magnets, because there are many non -magnetic metals. . The density test is only a very small metal density exceeding gold. The density of pure 24k gold is about 19.3 grams/ml, which is much higher than other metals. The density test method is enough to prove that your product is gold. The higher the density, the higher the purity of gold. Make sure your product has no additional gem. 1. If you do not have equipment in this area, jewelry shops can usually do density testing for you. 2, you can put your golden products in the container full of water, and then test the volume of overflowing water, and then except for the weight of the product you call, that is, the density of your gold product. Keep in mind that different gold purity has different grams/ml ratio: 14k- 12.9 ~ 14.6 grams/ml 18k gold-15.2 to 15.9 grams/ml 18k platinum-14.7 ~ 16.9 grams/ml 22k-17.7%to 17.8 grams to 17.8 grams /Ml. . Bite test everyone has watched movies, and the mininger bite gold to test it. I also saw that when the Olympic athletes won the gold medal, they would bite their "gold" medal. How simple this test is. 1, bite a gently. 2. Check your bite marks. The deeper the bite marks, the higher the purity of the gold. Actually, this is not recommended for testing, which will damage your teeth. What's more, the lead will be given to the gold, and the lead is softer. 6. Ceramic scratch testing 1. Using unlawish ceramics. If you don't have this, you can buy it from a ceramic shop. 2. Cover your gold products with ceramics. If it is a black scratch, it means that your product is not gold. If it is a golden scratch, it proves that your product is gold.
n00:00 / 00: 3470% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold up and hold it up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
Let's take a look at the tips for identifying the authenticity of gold and false, it's great
n00:00 / 01: 0470% shortcut keys: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
I feel that ordinary people will not master this technology, after all, they will not deal with gold all day.
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