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68 Supplement

In fact, the production of collodion is very simple, but the key problem is that it was in the late Ming Dynasty.

A simple example is sulfuric acid. Modern people all know what it is, but ancient people have never heard of this word. No matter how Liu Weichao explained it, Emperor Chongzhen did not understand it.

Although sulfuric acid actually existed in ancient times, it was called retort stone gall, invented by Gu Gangzi, an alchemist in the Tang Dynasty.

The problem today is not only because of the difference in the name, it has become a chicken-and-duck argument. But there is also another point. Even if Liu Weichao described the characteristics of sulfuric acid, Emperor Chongzhen was an emperor, not a chemist, and he had never been exposed to sulfuric acid.

Still don't understand.

Not to mention, in the production of nitrocellulose, concentrated sulfuric acid is actually used instead of dilute sulfuric acid.

After speaking for a long time, Liu Weichao felt very tired. Emperor Chongzhen was also flushed and a little ashamed.

I don’t understand this, I don’t understand that, just like a child, this knowledge is too shallow!

Fortunately, Liu Weichao was patient. After he really couldn't understand the concept of sulfuric acid, he tried to skip this concept and then explained other things.

The result was still the same as the concept of sulfuric acid, which encountered a lot of problems that Emperor Chongzhen still couldn't understand no matter how he explained it.

What's more, when Liu Weichao was explaining to Emperor Chongzhen, he suddenly discovered that the glass-making method he had given to Emperor Chongzhen before was also problematic.

"It's impossible for glass bottles to be exactly the same? That's impossible!" Liu Weichao was a little surprised.

Chemical experiments require precision, but Emperor Chongzhen said there must be a difference. So how to determine the chemical ratio?

Vaguely, Liu Weichao felt that it would be really difficult to light up the science and technology tree of chemistry in the late Ming Dynasty!

Emperor Chongzhen's voice had become much lower unknowingly, and he explained to Liu Weichao: "Those glass bottles are all blown by craftsmen. Even if I threaten to kill them, there is no way I can blow them out exactly the same!"

Liu Weichao slapped his forehead when he heard this, feeling that he was completely defeated.

Then, he asked in the tone of tutoring primary school students, with a hint of resentment that iron cannot become steel: "Then why don't you use the pouring method and use the mold method? Aren't the products that come out exactly the same?"

In the past, he only gave me the method of making glass. He always thought that he didn't need to worry about the rest.

"..." When Emperor Chongzhen heard this, he couldn't help but be speechless. After a while, he asked, "Can the same be done for this glass?"

"Why can't we do this?" Liu Weichao was speechless and asked.

If Emperor Chongzhen were his student, he would probably slap his palms in front of him. How could he be so stupid?

In fact, Liu Weichao really wronged Emperor Chongzhen.

In Europe, glass was invented in 200 BC. However, European glassmakers have always used the blowing method to produce glass products.

According to the original historical development, it was not until 1821 that the method of using molds to produce glass was invented.

In other words, the direct molding technology of glass has been delayed for two thousand years!

The reason for this is that the ancients lacked a systematic understanding of physics.

At this time, Emperor Chongzhen didn't understand, so Liu Weichao searched for a while, found the explanation, and then gave him a popular science guide: "As long as the melting points of glass and other things are different, it can be made using molds."

"A very simple example is to use wrought iron to make various container models such as flasks, retorts and test tubes with two halves in half, dip glass juice into them and blow them inside. After forming, open the mold, cut the mouth of the bottle, and polish it with sandpaper.

Get rid of the thin lines formed by the seams of the mold, and there are no technical obstacles. What comes out is bottles and utensils that are completely uniform in specifications and completely standardized."

Having said this, he added: "Using this method, you can make any glassware you want, and the output can be greatly improved!"

"..." Emperor Chongzhen was dumbfounded, as if this was really possible, why didn't he think of it!

The more glass is produced, the more money you can get from selling the glass!

Happy and looking forward to it!

Seeing him like this, Liu Weichao didn't want to chase him anymore. Instead, he thought of something and asked: "Tell me first, what are your glass products? Let me see if I can give them to you again."

Do you have any suggestions?"

When Emperor Chongzhen heard that he had seen the glass products produced, he quickly answered Liu Weichao.

After he finished speaking, Liu Weichao said to him: "Glass actually has many very practical uses, such as myopia glasses, reading glasses, telescopes, mirrors, flat glass used as doors, windows, even skylights, etc., which are very

Practical. Some of them may require some technology, and some may not. Just wait, I will send you all the methods. If you have any questions, you can ask me again!"

Glass, unlike nitrocellulose, does not have so many concepts and advanced technologies. I believe Emperor Chongzhen should have no problem.

Thinking like this, he hung up the communication. Although he probably knew how to do it, this was for Emperor Chongzhen, so he had to treat it as a completely blank foundation. Therefore, it was better to be more detailed about how to do it!

As for Emperor Chongzhen, after hanging up the communication, Concubine Hetian looked at each other with a feeling of confusion. The series of questions and answers just now hit them a bit.

Because of this, neither of them were particularly excited at the moment, and were even a little worried. They were afraid that they would be confused again next time.

Of course, this does not mean that all ancient people did not understand this.

If the person Liu Weichao was talking to this time was Song Yingxing, maybe things would be different.

After a while, the mobile phone received a message notification, one after another. When Emperor Chongzhen saw it, he quickly clicked on it to read it.

After a while, he finally breathed a sigh of relief.

Fortunately, not bad, most of them understand it and know how to do it.

And after reading this information, he felt happy.

Because the glass products sent by Liu Weichao this time are of very high value and can be sold for a lot of money, or in other words, they are very practical.

For example, the telescope, which he received from the Western Yi, was very useful for fighting.

There are also myopia glasses and reading glasses. For wealthy scholars, these are necessary to buy no matter how much money they spend.

And the mirror is much easier to use than the bronze mirror. It doesn't need to be polished frequently, and you can see more clearly.

Speaking of this mirror, Emperor Chongzhen couldn't help but sigh, because Liu Weichao had noted that such a simple method in Xiyi had been kept secret for more than three hundred years. It was not until about this time that it was revealed by some French

The technology was stolen and slowly made public.

While he was thinking, Liu Weichao sent another voice message.

When Emperor Chongzhen heard this, he couldn't help but agree deeply.


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