Many people don't understand gold and silver. They can only judge the quality of the gold and silver jewelry by looking at the label on the gold and silver jewelry (generally written with material, purity, weight, etc.). However, the label can also be printed at will! Just put a jewelry system in your computer and then type in the information you want, you can type the label out. So how do you know if the gold and silver jewelry you bought is genuine? Is there any water in the purity? Is the quality good or not? 1, four steps to easily identify the true and false gold The first step: observe the color of gold, the old saying: "seven green, eight yellow, nine five red", high purity gold enough to run enough to flash enough, mixed gold has a small point of paralysis. Moreover, "real gold is not afraid of fire", the gold is placed under high temperature, does not fade, does not melt, does not change color, and it looks like after cooling. Step 2: Gently measure its weight by hand to determine whether it is commensurate with the size of the volume. For example, gold with a large block size, if it feels lighter, it is likely to be adulterated. The third step: press the gold jewelry by hand, the softer is HD gold, the softer is low gold or mixed gold. The small gold ornaments can be bent, the color is clear and soft, and the folds are wrinkled; the low and hard gold is brittle and fragile; the mixed gold is also elastic. The fourth step: the two pieces of gold ornaments collide, the quality is good and the buzzer sounds; the poor quality makes a buzzing sound; the mixed blonde sounds like a jingle. 2, three steps to easily identify the true and false silver The first step: the higher the purity of silver, the whiter the color, the surface looks evenly shiny, very moist. If it contains lead, it will show a blue-gray; if it contains copper, it will have no moist feeling and is very rough. The color is yellow, the color is poor or the matt is mostly fake silver. The second step: the old saying is right, "aluminum is light, silver is heavy, copper is not light and not heavy." Silver is lower in hardness than copper, and larger than lead and tin. Spike with a pin, silver will not leave traces, other metal jewelry will leave obvious traces. Silver is easy to bend and not easy to break. Those who cannot withstand bending are fakes. The third step: the worse the color of silver, the lower the sound. If it contains copper, the sound is high and sharp; if it contains lead, tin, etc., the sound is dull and short. 3. How to judge the purity of gold K gold is divided into yellow K gold, red K gold, white K gold, color K gold, according to its content is divided into 22K, 18K, 14K, etc., and must have a factory imprint. The gold content rate of gold = X ÷ 24, X is the number before the "K", such as the gold content rate of 22K gold = 22 ÷ 24 = 91.7%. 1) Look at the color: Containing gold 70%, jewelry yellow in the green; containing gold 80%, jewelry is yellow; containing gold 90%, jewelry yellow transparent purple; containing gold 10%, jewelry is red. The texture of pure gold is soft, and it is generally not used as a decorative accessory. Therefore, if you see a mosaic of 24K, you must have a fake. 2) 掂 weight: The specific gravity of gold is 19.3 g/cm3. When the specific gravity is close to 19.3, the purity of gold will be higher; when the specific gravity is close to 18.5, the purity is about 95%; when the specific gravity is close to 17.8, the purity is about 90%, and so on. At present, many gold ornaments sold on the market are sub-gold products, that is, no gold components, but an alloy material made of metal such as copper, aluminum, nickel, etc., which has high hardness, wear resistance, no discoloration, etc. Features. 3) Touchstone: Prepare a fine black touchstone with a fine texture of several standard test pieces with varying amounts of gold on the touchstone, and then mark the gold to be identified on the same touchstone. Then add concentrated nitric acid on the touchstone to remove the impurities, find out the traces left by the characterization, and observe the traces left by the gold and the traces left by the test piece. If there is a consistent indication of the purity of the gold. That is the purity of the test piece, if they are inconsistent, the purity of gold is definitely wrong. 4. How to judge the purity of silver Observe the color of the silver jewelry mouth. If the mouth is white, the color of the surface will be bright after oxidation. It can be concluded that the color is about 98%; if the mouth is red, the color is about 95%; If the mouth is white and gray, slightly reddish, the color is about 90%; If it is found to be hard when bent by hand, the mouth is reddish or grayish, the color is about 80%; If the surface is white and dry, the mouth is reddish and yellow, then the color is about 70%; If the lipstick is black or yellow with black, the color is below 60%. Plain Dyed Roller Blind Shade Curtains
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