The two got out of the carriage, and Duan Lun came with someone over there.

"I've seen Yin Shanhou!"

Now the rest of the Ministry of Industry respects Tang Ping very much.

"Everyone, wait a minute, I'll try to make something first, if it's done, with the new products of our Ministry of Industry, it will definitely set off a frenzy in Chang'an."

"Yin Shan Hou, we are not in a hurry!"

"Yes, yes, if we don't dislike it, let's see if Yin Shanhou can do anything?"

Tang Ping can come up with an invention and make it together with the Ministry of Industry, which is already considered generous, how can everyone have opinions?

So the group followed Tang Ping into their glass workshop, where there were two soldiers guarding them, and after checking their identities, they let them in.

This is arguably the most well-guarded workshop in the workshop area, after all, glass can be mass-produced, so it is synonymous with profiteering in this era.

Wang Qingluan sent a steward here to greet him directly.

"Miss, these are some of the better pieces of glass that have been made in the workshop recently."

He carefully opened a row of boxes, each box was a piece of glass, not too big, the small one was about the size of a palm, and the big one was only the size of a human face.

But even if there was only such a large glass, it still made the officials of the Ministry of Industry behind gasp.

Thinking about the fact that Prince Xiban could come to the Tang Dynasty with a glass marble, such a smooth plane mirror would definitely bring a shock far beyond his glass marble at that time.

"Have you set up the shed?"

"Yes, it's all arranged!"

"Then let's go!"

What Tang Ping has to do today is to make a mirror, but in this era, it is unrealistic to use silver nitrate, because he doesn't know how to get that thing.

Even on Baidu, I didn't find out how to make silver nitrate in this era.

So the next best thing to do is to replace it with an older method.

It is to make silver mirrors out of tin and mercury.

These two things have been available here for a long time, tin can be said to be the earliest metal used in China, and the bronze ware of the Yin Shang period has the use of tin.

Mercury, or mercury, is a little later, but it's many years old.

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Doesn't the legendary Mausoleum of Qin Shi Huang mean that he used mercury as a river in the mausoleum?

And it is relatively simple to make a silver mirror in this way, that is, to spread the tin foil on one side of the glass, and then pour mercury, and after the mercury and tin foil react, pour out the excess, there is a silver mirror, and then only need to brush a layer of thick paint to isolate the silver surface inside.

The only drawback to this practice is that tin contains a lot of lead, and mercury is highly toxic.

So be careful about the toxicity when making it.

For this reason, Tang Ping specially asked Wang Qingluan to arrange people in advance to build a shed behind the glass workshop, which is ventilated around and will not let volatile mercury cause harm to the human body in a confined space.

Moreover, Tang Ping also asked someone to make completely airtight protective clothing and protective hats out of sheepskin, and wrapped the whole person tightly.

The scoop with mercury has a long handle that is almost a meter long, which minimizes the harm.

Seeing that Tang Ping was so serious, the others also retreated far away.

Tang Ping carefully lifted the ladle containing the mercury and slowly poured the mercury on top of the tin foil.

Soon the mercury dissolves the tin attached to the glass, forming an alloy called tin amalgamation on the glass.

This alloy can be firmly attached to the surface of the glass, forming a mirror surface.

Collect the excess mercury back and seal it again.

At this time, the tin amalgam on the glass did not have much volatile toxicity, Tang Ping took the red paint prepared by the steward and brushed a thick layer on it.

In order to make the paint dry quickly, I took a torch and dried the paint a little away at that temperature.

At this point, a mirror is complete.

But what is the specific effect, you have to turn it over and see the finished product.

All the people from the Ministry of Industry gathered around, curious about what kind of thing Tang Ping could come out of in the end after working so hard for a long time.

Tang Ping sighed in his hand, and then carefully picked up the mirror, facing the officials of the Ministry of Industry who were watching the excitement.

"Shhh

"Wow!"

"This!"

Marvel, in addition to marveling or marveling.

Everyone looked at the figures in the mirror, and many of them were for the first time

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See yourself clearly.

Even Wang Qingluan, who used a mirror in Tangping convenience store, also felt magical.

I actually used two kinds of highly toxic metals to make such a beautiful mirror.

Tang Ping looked at everyone's expressions, and knew that he was most likely successful, turned the mirror over, looked at his clear face in the mirror, and couldn't help but smile.

Of course, he can buy this thing from modern times, and the inventory in a small commodity market in Yiwu can sell the entire Chang'an.

But in that way, you can make money, but it is of no use to the development of this Datang.

This big battle made him clearly see the weakness of personal strength.

Even if he comes from a future with advanced technology, even if he has some black technology, it really doesn't have much effect when hundreds of thousands of troops are facing each other.

So on the way back this time, he thought that in order to strengthen the Tang Dynasty in this era, he had to start from the bottom.

Only by developing agriculture and revitalizing the handicrafts, industry and commerce of this era can the Tang Dynasty become rich and strong.

It was for this reason that when Li Shimin finally asked him to come to the Ministry of Industry to take a shift, he did not refuse.

Otherwise, if he really didn't want to, Li Shimin wouldn't force him.

Then there was a craftsman in the workshop who took the piece of glass, embedded it in a copper frame that had been prepared long ago.

There is even a bracket behind this copper frame, so that the first Datang glass mirror with this quaint shape appears.

"Yin Shan Hou, can you tell me how much such a mirror costs? How much does it cost?"

An official from the Ministry of Industry asked, that is, they are technical nerds, and most of the officials with some emotional intelligence in other departments would not ask such a question.

Because this stuff already involves something intimate.

However, Tang Ping didn't plan to keep it secret, otherwise he wouldn't have taken them to see it.

He just wants these technology nerds to be exposed to some different things, maybe they can trigger some of their inspiration, and they can make certain improvements to some of the current Datang technologies.

"In terms of cost, the current yield is not high, and with the early R & D costs, it can be said that making such a mirror now is about the same cost."

Money!"

(End of chapter)

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062 The first mirror produced by Datang is free to read.