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There are many fake gold in the society now. It looks just like the real gold. Today, I will teach you how to quickly distinguish the real gold from the fake gold p>
1、 Visual inspection 1. Check the official signs of gold. It is generally engraved with 999 or 990, or 10K, 18K, 22K, 24K. It is not considered to be lower than 10k because the content of gold is too low. If you look with a magnifying glass, you will see it more carefully 2. Ancient gold jewelry will not have obvious official purity marks 3. Of course, fake gold ornaments also have official marks, so further inspection is required 4. Look for obvious discoloration. Check the wear area of the gold surface, usually at the edge of the gold product, and check the discoloration. If the gold color gradually disappears and becomes another color, the product is only a gold plating 2. Bromine chemical test 1. Put the gold product into the alcohol solution and shake it for a while 2. Soak a piece of filter paper with alcohol solution 3. At this time, the filter paper turns gray purple 4. Drop 4 drops of bromine-a reagent onto the filter paper. If the filter paper turns white, the gold product is real gold the total test time is 20 minutes III. magnet test this is a simple test, but it is not a sufficient proof to prove whether it is genuine gold. You can find a strong magnet to do the test gold is not a magnetic metal. If your product is attracted by a magnet, it is enough to prove that this product is not gold. But just because your product doesn't respond to the magnet can't prove that it is gold, because there are many non-magnetic metals IV. density test: only a few metals have a density higher than that of gold. The density of pure 24K gold is about 19.3 g / ml, which is much higher than other metals. The density test is enough to prove that your product is gold. The higher the density, the higher the purity of gold. Please make sure your product has no gems attached 1. If you don't have the equipment in this area, jewelry stores can usually do density tests for you 2. You can put your gold product into a container filled with water, then test the volume of the overflowing water, and then divide it by the weight of the product, which is the density of your gold product. Remember, different gold purity has different G / ml ratio: 14k – 12.9? 14.6 g / ml 18K gold - 15.2 to 15.9 g / ml 18K platinum - 14.7? 16.9 g / ml 22K - 17.7% to 17.8 g / ml v. bite test everyone has seen the film. The miner bites the gold to test it. We can also see how easy it is for Olympic athletes to bite their "gold" medal when they win the gold medal 1. Take a bite 2. Check your bite marks. If the bite marks are deeper, the purity of gold will be higher in fact, this test is not recommended. It will damage your teeth. What's more, gold will be plated with lead, which is softer VI. ceramic scratch test method 1. Use unglazed ceramics. If you don't have this, you can buy it from a ceramic shop 2. Scratch your gold product with ceramic. If it is a black scratch, it means that your product is not gold. If it is a gold scratch, it means that your product is gold.
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