Is there a tooth mark if you really bite into the gold?

Yes, because there are tooth marks in the first place.

First, the view of color:

According to the folk experience of "seven green, eight yellow, nine five red", observe the color withering of ** color. judging the fineness and authenticity;

Second, look at the mark:

Generally** jewelry is engraved with the manufacturer's font size and ** fineness (k). If the trademark is correct and the handwriting is clear, its fineness is basically clear; If there is no stamp, the remade gold jewelry can be tested on the touchstone.

Third, weigh the weight.

** is second only to platinum. The real ** should feel heavy in the hand, and the false ** feeling is more warpoured.

Fourth, try the feel:

You can gently bend the jewelry by hand to feel softer is true**, otherwise it is fake**.

The above is a physical method to test and discern**, and its accuracy is not very high. For more accurate identification, it is best to use chemical methods. Here's how:

Rub the gold jewelry on the touchstone a few times, then point a few drops of nitric acid and soot, wash off the silver and copper with clean water, if it is **, then leave a golden yellow color on the touchstone, otherwise there is nothing left. The amount of alloy can be obtained by comparing the shade of golden yellow left on the touchstone with that of the gold medal.

For the identification of gold jewelry, you can also use the ** color tester. According to the measured K value and density value, judge the fineness and authenticity of **. However, this instrument is accurate for solid jewelry, and large for fine and hollow gold jewelry.

**It is relatively soft, if it is really pure gold, then bite down with your teeth, with a little force, you will definitely bite out some marks.

Yes,**Although the luster is strong but not hard, when the real gold is carved with a metal needle, it will leave obvious nicks, and the tooth marks can be seen by biting with teeth, and folk goldsmiths often bite with their teeth, and judge the color according to whether they can bite is the use of the principle of hardness to distinguish the true from the false.

The better the quality, the softer it will be, so there will be tooth marks when you bite into a good quality.

Really bite down, of course there are no tooth marks, ** is very hard, like those gold bricks and gold bars bite, how can there be tooth marks?

**The texture is relatively soft, if it is true**, biting it will leave tooth marks, fake and no indentation.

Because of the metal properties of **, toughness and ductility.

Exceptional. So when a piece of ** can't be judged by the naked eye whether it is true or false, people just bite with their teeth to see if there will be a faint bite mark, and if there is, it is regarded as real gold.

Finish. Although it is a very soft metal, it can be scratched with a fingernail on pure gold, which makes it very easy to process, but this is not ideal for the manufacturer of ornaments, because it is easy to rub the ornaments, make them lose their luster and even affect the appearance. Therefore, when making jewelry with **, copper and silver are generally added to improve its hardness.

**Easy to forge, easy to spread, can be milled into transparent and transparent green gold leaf with a thickness of millimeters.

The gram of ** can be drawn into a 160-meter-long gold wire. Hardness 2-3, pure gold, melting point; It has good ductility, can be pressed into thin foils, and has extremely high heat transfer and electrical conductivity.

The resistance of pure gold is. Pure gold has good chemical resistance and is the best electroplating material.

Extended information: tooth bite, because of the metal characteristics of **, toughness and ductility are particularly good. So when a piece of ** can't be judged by the naked eye whether it is true or false, people's first reaction is to bite it with their teeth to see if there will be a faint bite mark, if there is, it will be regarded as real gold.

After the processing is completed, the ancients will have an additional "tempering" process, which can reduce the hardness of the first and enhance the toughness and extensibility. So in the past, the ancients would use their teeth to bite their teeth to judge the truth of **.

The ancient metallurgical technology was not very passable, and the fake gold mixed with copper, tin and lead alloys could not be consistent in color, softness and hardness, and taste, so such a test method was still relatively reliable at that time.

Because among the metal properties of **, toughness and ductility are particularly good. So when a piece of ** can't be judged by the naked eye whether it is true or false, people just bite with their teeth to see if there will be a faint bite mark.

The radius of the gold atom is large, the metal bond strength is weak, and there are many free electrons, so the slippage of the atom in the stretch will be obvious, but the bond is not easy to break, so it has good ductility, and when the tooth bites down, there will be a faint bite mark is regarded as real gold.

This is the way of ordinary people!

Because in metal, ** is relatively soft.

The hardness of the full number of gold 2 3, when the real gold is carved with a metal needle (such as a pin), it will leave obvious nicks, and the folk goldsmiths often bite with the old teeth of the manuscript, and judge the color according to whether they can bite it is also the use of the principle of hardness to distinguish the true from the false.