Glass, which is extremely common in real life in the original space. There is glass in every aspect of life, which is extremely ordinary. Glass is something that is closely related to the people of the original time and space, and the cost is very low, very cheap.

Glass was discovered and made relatively early, five or six thousand years ago, a craftsman who made pottery in ancient Egypt saw a shiny piece in the pot when he took it out of the kiln. This clever and careful craftsman did not let go of this accidentally discovered crystal, he analyzed the composition of the clay, tested the firing again and again, and found out that this shiny thing was fired from a mixture of sand and soda, which is equivalent to later glass products.

Around the 4th century, the Romans began to apply glass to doors and windows. By 1291, glassmaking technology in Italy was well developed.

Later, Italian glassmakers made colorless glass. Colorless glass has good transparency and high refractive index, so it can be used not only as a window for buildings, but also for telescopes.

Because of the leading technology, the profit of glass is extremely high. In the 16th and 17th centuries, in order to prevent the leakage of glass-making technology, the Italians sent glass-making craftsmen to an isolated island to produce glass, and they were not allowed to leave the island for the rest of their lives. Making the Italians the only novel in Europe. The country that mastered the manufacture of glass.

In 1688, a man named Nav invented the process of making large pieces of glass, and since then, glass has become an ordinary object. Until then, glass was very precious.

In ancient China, there was no such thing as glass, only colored glass. Liuli though close. But it is not glass in the modern sense, it comes from the glazing of ceramics. Although there may have been occasional physical objects such as glass in history, there has not been a production variety. It didn't even attract attention.

Glass was officially introduced to China during the Yongzheng period. At that time, Guangzhou's foreign trade was booming. In those years, foreign goods dealers who undertook foreign merchant ship trade in Guangzhou built Western-style foreign goods dealers in Guangzhou, and the first imported glass was inlaid on the windows of foreign merchant houses.

The process of making glass is not complicated, it is very simple, and the methods and raw materials of modern glass manufacturing are almost no different from those of ancient times. The raw material used to make zuò glass is also very common.

The raw materials for making zuò glass are sand (silica), limestone (calcium carbonate), and soda ash (sodium carbonate), which are melted together and cooled to become ordinary glass. The same was done in ancient times. However, at that time, the composition of the raw materials was not very accurate, and there were often failures, because the composition of glass could vary in a wide range.

Therefore, Li Guozheng was worried about how to make the observation instrument and pressure meter on the steam engine. Glass comes to mind.

So. Li Guo is ready to make glass, which is very important.

Li Guo did what he wanted, and immediately began to build a factory, pulling sand, limestone and soda ash. In addition, Li Guo remembered that adding lead oxide to the sand can lower the melting point of the sand. Of course, I tried my best to find black lead ore. I was also lucky to find manganese ore in nature, which is widely distributed and used to make white glass.

I heard that Li Guo was going to burn sand. What to do with glass? Song Yingxing was busy manufacturing a large forging press, and at the same time, he was busy looking at the rarity.

Outcome. The glass that came out of the first burn made a mess. Because the glass has really become a mess.

On the contrary, Song Yingxing admired it very much, "My God, I said Master Hu, what is this, smooth and transparent, did you burn out the crystal?" Amazing! ”

Li Guozheng was angry that the glass was not formed, and when he heard Song Yingxing's praise, he scolded, "Get out of the way!" One less day after day, I will sue you, Lao Tzu failed this time! ”

"Failed? Master, what are you going to do? Song Yingxing really couldn't imagine what the glass Li Guo was going to do was like.

Li Guo carefully recalled the production method of the original space-time glass, and he remembered that there was a video on the Internet, which recorded the most primitive method of making flat glass from glass solution. One is the vertical drawing method in which the glass solution is lifted with a stick, or the flat drawing method in which the glass is pulled forward, and the shape is pressed out in two rotating rollers when the glass is about to form.

But Li Guo must not be able to do these methods well, so Li Guo decided to leave those three methods to the workers in the future. In order to succeed in manufacturing flat glass, Li Guo invented the stall method in a real sense! And the pressure method!

This method is clumsy and not very productive, but Li Guo is already satisfied.

To put it bluntly, the spreading method is to spread the glass solution into the abrasive, and then press it again.

Li Guo ordered Song Yingxing to build him a smooth iron plate with grooves, and a fire was lit under the iron plate, and the temperature could not be kept too high, so as to ensure the best fluidity of the glass solution. Pour the glass solution from the crucible into the groove, wait for the solution to level, and slowly withdraw the fire under the iron plate. After the temperature slowly cools down, the glass solution in the middle of the upper and lower iron plates fills the gap in the middle, and carefully makes it out to become glass.

Although after the first piece of glass was made, there were bubbles and some ripples in the glass, but Li Guo was already very satisfied, this is his own masterpiece! I'm really amazing!

Li Guo was secretly narcissistically admiring himself, only listening to a plop. Li Guo looked back, and Song Yingxing knelt down with the scriptures.

"True gods too!" Song Yingxing's excited eyes were red, this Li Guo was a god in Song Yingxing's eyes, and he was amazing, "I didn't expect that the tiger master was not only good at fighting in the south and the north, but also knew everything about the kit kat process, and the steam engine in the first period of time had already made me admire it a lot, and now I have nothing to say." Although I, Song Yingxing, have not achieved fame, but I have not served anyone in the workshop, Master Tiger, I have served you! ”

Li Guo was even more complacent, "That's, who am I?" Did I blow it out? No, Lao Tzu is a white tiger star! ”

Song Yingxing sighed, "Master Tiger, this thing you made is good!" This thing will definitely spread all over the country, and it will definitely be worth a lot of silver! I don't know how many people who want to learn this craft in the future and respect you as a teacher? ”

"What? Across? Respect me as a teacher? Li Guo immediately jumped up and ordered Zhao Dagou and Wang Da Stick to "Hurry up!" Transfer all my 3,000 guards to me, you two listen to Lao Tzu, protect this place for me for twelve hours a day, these dozens of craftsmen inside can't go out, and no one outside is allowed to let in! Not anyone! ”

Zhao Dagou and Wang Dabang didn't understand anything, only knew how to blindly obey, and immediately mobilized people to surround this room made of zuò glass.

Song Yingxing was taken aback, "Master, what are you going to do?" ”

Li Guo smiled: "Do you know what monopoly is?" ”

Song Yingxing shook his head: "I don't know!" ”

"Monopoly means that we can only have this thing, and others can't have it! Monopoly means that we can make a fortune! Li Guo couldn't help but be happy, that Italian glass is very valuable in Europe, isn't it because of monopoly! (To be continued......)