After Fauber finished speaking, he took the drawings and turned around to prepare for the manufacture of the compass, after all, the situation was urgent.

"Hey, Fauber, wait!"

Li Zexuan hurriedly grabbed Fu Bo and said: "Fu Bo, the upper part of this compass should also be covered with a layer of glass, uh, it is colored glass, cover it with a layer of colored glass, otherwise the magnetic needle is easy to fall off and easy to be damaged!" ”

Fauber paused, nodded when he heard the words, and said, "Well, that's true, but in this way, the cost of a compass is too great!" ”

Li Zexuan had seen countless crossings in his previous life, and naturally knew that glass was a luxury in ancient times, and the price was very high, so he pondered for a moment and said, "Fu Bo, you buy some glass from Hu Shang, make a compass first, and I will use it urgently today." ”

"Yes, young master, if you make one first, it shouldn't be much of a problem."

Li Zexuan nodded, he looked out of the door, sighed faintly, and then he took out the recipe and firing method of the glass he had just written from the table, and said:

"The compass behind does not need to buy glaze from Hu Shang, I have a method of firing glaze here, the recipe and detailed steps are written on it, you will explore it well, it should not be a day or two, our workshop can make its own glaze, and it is more pure than the kind of glaze sold by Hu merchants! Those Hu merchants rely on the rough glass manufacturing process, and they have made so much money from my Datang over the years, and now it's time for them to be eliminated! ”

"What?"

Fu Bo couldn't help but exclaim, it was really Li Zexuan's words that were too amazing, since the glass was transmitted to the Central Plains, people didn't want to imitate it, but none of them ended in failure, because just from the appearance, you can't see the ingredients of the glass at all, let alone imitate it.

"Young Master, do you really have a way to burn glass?"

"Well, I will write you the recipe and firing method of the glass later, Fu Bo, you try it a few more times, you should be able to make it, but you must pay attention to confidentiality, the formula of the glass should be top secret in the workshop, the fewer people who know, the better!"

As long as you know the recipe and firing steps of glass, its manufacturing process is not complicated.

In fact, China's glass manufacturing process began in the Western Zhou Dynasty, but the glass made at that time was turbid and far from meeting the technological requirements of modern glass.

There is a small story about the first person to discover glass, it is said that more than 1,000 BC, a European Phoenician merchant ship, loaded with crystal mineral "natural soda", sailed on the Belus River on the Mediterranean coast. Due to the low tide of the sea, the merchant ship ran aground. So the crew took to the beach. Some crew members also brought cauldrons, firewood, and used a few pieces of "natural soda" as a support for the cauldron to cook on the beach.

After the crew finished eating, the tide began to rise. They were about to pack up and board the ship to continue sailing, when suddenly someone shouted, "Come and see, everyone, there is something bright and shining in the sand under the pot!" "The crew brought these glittering things to the ship and studied them carefully. They found that there was some quartz sand and melted natural soda stuck to these shiny things. It turned out that these glittering things were the natural soda that they used to make the stand for the pot when cooking, and under the action of the flame, the crystals produced by chemical reaction with the quartz sand on the beach, this is the earliest glass.

Later, the Phoenicians made a fortune by mixing quartz sand with natural soda and melting it in a special furnace to make glass balls. Around the 4th century, the Romans began to apply glass to windows and doors. By 1291, glass-making technology in Italy was well developed.

"Our country's glass-making technology must not leak out, and all the craftsmen who make glass are concentrated together to produce glass!" In this way, Italian glassmakers were sent to produce glass on an isolated island, from which they were not allowed to leave for the rest of their lives.

In 1688, a man named Naf invented the process of making large pieces of glass, and from then on, glass became an ordinary object.

Seeing that his young master looked like he was swearing, Fu Bo knew that the matter of the glass formula was true, he took the formula, and said solemnly:

"Young master, don't worry, I still know the importance of the old man, the manufacturing of the glass, the old man will personally follow up, the people who know the specific recipe will definitely not exceed five, and these people are all people who are absolutely loyal to the workshop. As for the first compass, it should be possible to build it today! ”

Li Zexuan nodded with satisfaction and said, "Well, then Fu Bo, go and get busy!" I'm in the workshop in the afternoon, so feel free to come and ask me if you have any questions. ”

When Fu Bo heard this, the solemn look on his face became a little stronger, because Li Zexuan had never been in the workshop for such a long time, and today he took the initiative to stay, and it can also be seen from this aspect that Li Zexuan attaches great importance to the compass.

"Then the old man will arrange for the craftsman to make a compass!"

Fauber took his leave.

Inside the house.

Li Tai looked at Li Zexuan curiously and asked, "Mr. really knows how to make glass?" Can you tell us about Tai? ”

Li Zexuan rolled his eyes and said angrily: "This is a trade secret, why should I tell you?" ”

“……………”

Li Tai was choked for a while, and he said speechlessly: "I won't steal business with you, you're too stingy, right?" Besides, as a gentleman, you should preach, teach, and solve doubts! ”

This little fat man is really a set of big truths, Li Zexuan is helpless, he can only give them a brief introduction to the principle of glass manufacturing:

"In fact, the manufacture of glaze involves another discipline, I call it "Chemistry", the so-called chemistry, you can understand it as the science of change, several things react with each other, can be changed into other substances, this is the core of the discipline of chemistry, if you have time in the future, I can systematically tell you about this discipline. Next, I will briefly talk about the firing principle of colored glass..............."

Li Zexuan slowly explained the principle of the reaction between various components in the glass manufacturing process to Li Tai and Meng Wenhao roughly, and they must not be too detailed, otherwise many basic problems will be involved. In the process of explaining, it is inevitable that some words that they have not heard will jump out, but no one interrupts, and they are all listening attentively, because they understand that the knowledge that Li Zexuan talked about is likely to be the only one in Datang, and there is no other home, and this knowledge is also likely to change the entire Datang!

…………………

The second update!

Thank you for the monthly pass!

(End of chapter)