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adjustable compartment trays for jewelry wholesale Why do you want to bite with teeth to distinguish gold?
The toughness and ductility are particularly good in the metal characteristics of gold. Therefore, when a piece of gold cannot judge whether it is true or not with the naked eye, people just bite with their teeth to see if there will be faint bite marks. If so, it will be regarded as real gold.
Golden is a very soft metal, and traces can be drawn with nails on pure gold. This softness makes gold very easy to process. Ideal, because this can easily hurt the decoration, make it lose its luster and affect the beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.
It gold is forged and easy to extend, which can be crushed to a transparent and transparent green foil with a thickness of 0.001 mm. 0.5 grams of gold can be pulled into a 160 -meter -long golden. The hardness is 2-3, the pure gold is 19.3, and the melting point is 1064.4 ° C; it has good ductility and can be pressed into thin foil. It has extremely high heat transfer and conductivity. The resistance of pure gold is 2.4P. Pure gold has good anti -chemical corrosion and is the best electroplating material.
The expansion information:
This bite, because of the metal characteristics of gold, the toughness and ductility are particularly good. Therefore, when a piece of gold cannot judge whether it is true or not with the naked eye, the first reaction of people is to bite with their teeth to see if there will be a faint bite marks.
Puki will have an additional "recovery" process after gold processing is completed, which can reduce the hardness of gold and enhance the toughness and extension of gold. So in the past, the ancients would bite the authenticity of gold with their teeth.
The ancient metallurgical technology is not very passable. Fake gold made by copper, tin and lead alloys cannot be consistent, hard and hard, and the taste, so this test method was more reliable at that time.
Reference materials Source: Baidu Encyclopedia-Gold
wholesale jewelry ruston 5 2 to 5 5 Because of the metal characteristics of gold, the toughness and ductility are particularly good. So when a piece of gold cannot judge whether it is true or not with the naked eye, people just bite with their teeth to see if there will be faint bite marks.
wholesale jewelry byusk Golden atoms have a large metal bond strength and weak and free electron. Therefore, the slippery of the middle atom will be obvious, but the key is not easy to break.
la fashion wholesale jewelry Because of the metal characteristics of gold, the toughness and ductility are particularly good. Therefore, when a piece of gold cannot judge whether it is true or not with the naked eye, people just bite with their teeth to see if there will be faint bite marks. If so, it will be regarded as real gold.