Gold jewelry is prevented for a long time in a sulfur environment, and red spots may be available on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry. The discoloration or fading of gold jewelry is closely related to the human sweat. 99%of the human sweat is water, and about 1%of the body is waste and harmful substances in the human body, such as: chlorine substitutes, lactic acid, urea ammonia ammonia. Wait. The expansion information: physical properties 1, color: The steam emitted when gold is melted is green; its gold powder during the smelting process is usually brown; Casting into a thin piece, it can convey green light. 2, ductility: is extremely strong. 1 ounce of gold can be pulled into 50 miles long, and its ductility makes it easy to cast and is a good choice for making jewelry. Gold is the strongest in the metal. 3, forgedness: INO. It can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 4 million -foot thick and 100 square feet. The ancients hammed it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold.
After the golden jewelry is in contact with sulfur or acid, red spots may appear. The gold jewelry has sufficient gold jewelry and thousands of gold jewelry, but no matter how high the content is, it may contain other impurities. Gold jewelry is placed in a sulfur environment for a long time, and there may be red spots on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry. Is to become red, white or fading when you encounter gold, white or fading, you can eliminate doubts with fire and distinguish the authenticity. As the saying goes, "real gold is not afraid of fire refining". Relatively high, you can quickly dissolve other impurities through fire.
Pay content for time limit to check for freenAnswer Hello! The real golden burning will become red. When gold reaches a certain heat, it will change color. Put the golden bars or gold jewelry on the fire for a while. Since the oxidation reaction will occur with the oxygen in the air, the gold bars with insufficient purity will become gray; The steam emitted when it is melted is green, and its gold powder is usually brown during the smelting process. If it is cast into a thin piece, it can also transmit green light.
Gold jewelry is prevented for a long time in a sulfur environment, and red spots may be available on the surface.
In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry.
The discoloration or fading of gold jewelry is closely related to the human sweat. 99%of the human sweat is water, and about 1%of the body is waste and harmful substances in the human body, such as: chlorine substitutes, lactic acid, urea ammonia ammonia. Wait.
The expansion information:
physical properties
1, color:
The steam emitted when gold is melted is green; its gold powder during the smelting process is usually brown; Casting into a thin piece, it can convey green light.
2, ductility:
is extremely strong. 1 ounce of gold can be pulled into 50 miles long, and its ductility makes it easy to cast and is a good choice for making jewelry. Gold is the strongest in the metal.
3, forgedness:
INO. It can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 4 million -foot thick and 100 square feet. The ancients hammed it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold.
After the golden jewelry is in contact with sulfur or acid, red spots may appear.
The gold jewelry has sufficient gold jewelry and thousands of gold jewelry, but no matter how high the content is, it may contain other impurities. Gold jewelry is placed in a sulfur environment for a long time, and there may be red spots on the surface. In addition, when gold jewelry is in contact with acid, there may also be red spots. This is due to the result of the oxidation layer on the surface of the jewelry on the surface of the jewelry.
Is to become red, white or fading when you encounter gold, white or fading, you can eliminate doubts with fire and distinguish the authenticity. As the saying goes, "real gold is not afraid of fire refining". Relatively high, you can quickly dissolve other impurities through fire.
Pay content for time limit to check for freenAnswer Hello! The real golden burning will become red. When gold reaches a certain heat, it will change color. Put the golden bars or gold jewelry on the fire for a while. Since the oxidation reaction will occur with the oxygen in the air, the gold bars with insufficient purity will become gray; The steam emitted when it is melted is green, and its gold powder is usually brown during the smelting process. If it is cast into a thin piece, it can also transmit green light.
It may not be gold, your gold is willing to be gold -plated or pure copper,
gold oxidation is black
copper oxidation is red
It should be oxidized, take it to clean up and make the master over fire