There are many ways to identify gold jewelry in jewelry packaging. The official summarizes a set of simple ways. The formula is: look at the color, osteopsis, listening rhyme, folding hardness, stone grinding, control cards, acid dots, and color. The first four sentences depend on the eyesight and feel that the last four sentences need to be used by tools and reagents. First, see the color and color of the color according to the different gloss and color of the gold, you can generally distinguish the pure gold, K gold, real gold, and fake gold. That is, gold is better with red yellow, 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 greens, eight yellow, nine five red, and yellow leucorrhea ash. For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color". Second, the density of density gold is 19.32 grams/cubic centimeter, which is about double the same volume of silver, lead, and tin. Available formula: The quality (gram) of gold jewelry is sure that the volume (cubic centimeter) of the gold jewelry (cubic centimeter) is equal to density. Seeking the density of the gold jewelry tested, the density is about 19.32 grams/cubic centimeter, it is pure gold or more pure gold, otherwise it is a non -pure gold or color difference gold (this method has no damage to the jewelry). Jewelry packaging III, folding hardness gold has the characteristics of ductility and less hardness, which can be compressed into a thin piece of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97%of gold jewelry, after two or three times, wrinkles appear, also called fish scales; about 95%of gold jewelry, feel hard when bending, and the fish scales are not significant; The jewelry is very hard when the bending is bent, without fish scales; gold jewelry containing more impurities, bend twice or three times to break; When using this method, you should consider the width and thickness of the jewelry. The thick and width should be hardened, and the thin and narrow ones are softer.四、听音韵、看弹性成色高的黄金首饰受敲击或往硬地抛掷时，发出“噗嗒、噗嗒”的爽朗低声，且无音韵、无弹力，K金有音韵、有声、有Elasticity, the greater the elasticity, the more the rhyme, the more older, the worse the color. 5. Use the test gold stone to identify the gold card (gold medal with affirmative color) and the test jewelry on the test gold stone. Through the contrasting color, the gold jewelry is affected. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps. 6. Break out the golden trails of the identified jewelry and the cards on the test gold stone with acidity. Try nitric acid on the golden road with a glass stick. Because the chemical properties of the gold element are stable and not reflected with the acid, the color remains unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changing is "three fast, three slows", that is, the low color disappears quickly, and the high color disappears slowly; Regarding the disappearance of the golden road, the gold jewelry can be confined to the card. Jewelry
There are many ways to identify gold jewelry in jewelry packaging. The official summarizes a set of simple ways. The formula is: look at the color, osteopsis, listening rhyme, folding hardness, stone grinding, control cards, acid dots, and color. The first four sentences depend on the eyesight and feel that the last four sentences need to be used by tools and reagents. First, see the color and color of the color according to the different gloss and color of the gold, you can generally distinguish the pure gold, K gold, real gold, and fake gold. That is, gold is better with red yellow, 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 greens, eight yellow, nine five red, and yellow leucorrhea ash. For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color". Second, the density of density gold is 19.32 grams/cubic centimeter, which is about double the same volume of silver, lead, and tin. Available formula: The quality (gram) of gold jewelry is sure that the volume (cubic centimeter) of the gold jewelry (cubic centimeter) is equal to density. Seeking the density of the gold jewelry tested, the density is about 19.32 grams/cubic centimeter, it is pure gold or more pure gold, otherwise it is a non -pure gold or color difference gold (this method has no damage to the jewelry). Jewelry packaging III, folding hardness gold has the characteristics of ductility and less hardness, which can be compressed into a thin piece of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97%of gold jewelry, after two or three times, wrinkles appear, also called fish scales; about 95%of gold jewelry, feel hard when bending, and the fish scales are not significant; The jewelry is very hard when the bending is bent, without fish scales; gold jewelry containing more impurities, bend twice or three times to break; When using this method, you should consider the width and thickness of the jewelry. The thick and width should be hardened, and the thin and narrow ones are softer.四、听音韵、看弹性成色高的黄金首饰受敲击或往硬地抛掷时，发出“噗嗒、噗嗒”的爽朗低声，且无音韵、无弹力，K金有音韵、有声、有Elasticity, the greater the elasticity, the more the rhyme, the more older, the worse the color. 5. Use the test gold stone to identify the gold card (gold medal with affirmative color) and the test jewelry on the test gold stone. Through the contrasting color, the gold jewelry is affected. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps. 6. Break out the golden trails of the identified jewelry and the cards on the test gold stone with acidity. Try nitric acid on the golden road with a glass stick. Because the chemical properties of the gold element are stable and not reflected with the acid, the color remains unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changing is "three fast, three slows", that is, the low color disappears quickly, and the high color disappears slowly; Regarding the disappearance of the golden road, the gold jewelry can be confined to the card. Jewelry