Trillion Market Capitalization is not a Dream

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Seeing Zhao Manfu's angry look, Zhou Wencheng actually thought of the way Miss Wang from CCB repackaged the gold bars for him.

This is not God's will, what is it? Since God has given me the opportunity, I naturally have to seize it.

Zhou Wencheng comforted Zhao Manfu and said, "Mr. Zhao, don't be angry. I think this packaging seems a bit childish. I didn't find this flaw when the bank staff packaged it.

For us, packaging is a trivial matter. If the gold bars are genuine, there will be no problem.

The authenticity of the gold bars is more important.

Mr. Zhao, just open it and take a look. "

After hearing what Zhou Wencheng said, Zhao Manfu opened the box of gold bars, picked up the gold bars and pretended to check them.

Finally, he put down the gold bar and said, "I don't know how to test the authenticity of the gold bar.

People on TV are biting it with their teeth. Your gold bar is too big to bite. "

Zhou Wencheng smiled and said: "Forget it, I'd better ask the professionals."

After finishing speaking, he took out his mobile phone and found Xiao Wang's phone number in the phone address book of the first branch of Nanshan Construction Bank. After dialing, he said, "I'm Zhou Wencheng, the one who just bought the gold bars."

A surprised voice came from the phone and asked: "Hello, Mr. Zhou, did you check that the gold bars were fake so quickly?"

Zhou Wencheng smiled awkwardly and said: "No.

Because this gold bar is very important to us and must not be fake. We want to verify it, but we don’t know how to verify it. "

After finishing speaking, Zhou Wencheng turned his cell phone on speakerphone and placed it on the coffee table between himself and Zhao Manfu so that both of them could hear the communication on the phone.

"So, I guess you called me because you wanted the person who sold you the gold bars to teach you how to verify the authenticity of the gold bars, right?"

"Yes, that's the idea."

"Then, can you believe what I say and won't you think that I'm just talking nonsense to sell fake gold bars?"

"I trust you won't lie to me.

"

"Okay, that's just your brain."

"I'll just try to explain it to you."

"Have you ever watched a costume drama? In it, does it say that if you leave bite marks, you will be gold?"

"Yes."

"How about you take it out and bite it now?"

"Really bite?"

"Of course, this is the simplest identification method, do you understand?"

"I don't understand, I'd better bite it."

"Some brick makers say that real gold will generally leave faint tooth marks after being bitten with your teeth. This is because gold with high purity is a bit soft, while impure gold is hard and cannot leave teeth marks."

"Mine has some teeth marks on it. It looks like real gold."

"Don't worry, the experts haven't said anything yet."

"Then go on."

"Experts say that the Mohs hardness of human teeth is 6, the relative Mohs hardness of gold and silver is 2.53, pure copper is 3, and iron is 4.

Therefore, the Mohs hardness of gold, silver, copper, and iron materials is not high. If you bite hard or hard with your teeth, you may leave conspicuous tooth marks as long as you bite hard enough.

To sum up, there is no scientific basis for using human teeth bite marks to distinguish gold from authenticity. "

"Ah, that's it, no, this piece of gold has been bitten, I want to return it."

“You bit it yourself, it’s none of my business.

Are there other identification methods? Do you want to continue listening? "

"Why don't you listen?"

"Do you have a magnet in your hand?"

"We don't have it now. If you need it, you can just look for one later."

"A magnet can test the authenticity of gold.

If the gold contains other metal impurities, use a magnet to suck it in. If it can be absorbed, it means that the gold has more impurities and is adulterated gold.

This statement is true.

But scientific knowledge tells us that there are only three metals: iron, cobalt, and nickel, which can be attracted by magnets.

Therefore, if gold counterfeiters add metals other than iron, cobalt, and nickel, the magnet method cannot detect it. "

"Well, that's understandable.

I'll find a magnet to suck it up later. If it sticks, I'll have to ask you to return it. "

"Okay, if it sucks, it will be refunded. But if there are teeth marks, it cannot be refunded. It must be restored to its original state."

"Is there any other identification method?"

"Yes. Density measurement can be used for general testing, which can eliminate some adulterated gold.

The density of gold ranges from 19.26 grams cubic centimeters to 19.37 grams cubic centimeters at room temperature.

You can choose a measuring cup with higher precision and put in a certain amount of water, such as 200 ml.

Put the gold bars into the water. It should be noted that the gold bars must be completely submerged.

Measure the volume of new water to get the data, for example, 350 ml - 200 ml = 150 ml.

This 150 ml is the volume of a gold bar.

Knowing the mass and volume of a gold bar, the density of the gold bar can be easily calculated.

If the calculated density of the gold bar is within the range of the standard value, then the gold bar is more likely to be of higher quality, otherwise it may be adulterated.

It is important to note that this method eliminates most adulterated gold.

However, if the gold is adulterated by adding other suitable metals in a strict and scientific ratio.

We wouldn't be able to tell.

For example, counterfeiters have mixed iridium and tungsten, two metals whose specific gravity is relatively similar to gold, and cannot be identified by measuring density alone. "

"Well, I understand. This is the density method. Are there any other simpler identification methods?"

“There are simple ones.

Physical bending methods can also be used.

This method is suitable for thin-sheet gold bars, and the gold bar itself can be bent by hand before purchase.

If the purity of the gold bar is very high, such as pure gold, then the gold bar can be bent.

If the gold bar has low purity and poor color, it will be more difficult to bend. It will be difficult for ordinary people to bend the gold bar with bare hands. "

"This method is not suitable for someone as strong as me, who can bend anything."

"I'm just bragging, can you bend a steel bar?"

"It really can. I'm just curious, will the gold bar be broken?"

"Don't worry, don't worry. No matter how fake the gold bar is, it will still have some gold in it. The malleability after compounding is also relatively good. I haven't heard of anyone breaking the fake gold bar with bare hands."

"I understand this method, please tell me the next method."

"I guess you like the next method better."

"Oh, tell me."

“This method is: fire method.

Melt the gold bars with a high-temperature flame, and other impurities will be naturally separated from the gold bars.

This method can accurately detect whether gold bars are adulterated.

But it also completely destroys the craftsmanship of the gold bar itself.

It depends on whether this method works for you. "

"It's too unsuitable. It burned out and turned into golden pimples. It's so ugly."

"It's indeed a bit ugly. I've been saying this for so long. Let me drink some water and catch my breath before I talk."

Zhou Wencheng quickly muted the phone microphone and asked: "Mr. Zhao, it is too difficult to identify the authenticity of gold bars. Do we still need to continue consultation?"

For the convenience of reading next time, you can click "Collect" below to record this reading record (Chapter 400: It is too difficult to identify the authenticity of gold bars), and you can see it next time you open the bookshelf!

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