Jiang Tian's mind and behavior have not been able to be displayed, at least for the time being. During the Chinese New Year, except for some children who don't have to worry about life, the things that adults are busy with are nothing more than visiting everywhere, even if they are idle at home, waiting for guests to come to their door. However, Jiang Tian does not have such a broad interpersonal relationship, and on the third day of the Lunar New Year, as long as his students come to the door to pay New Year's greetings, he will be considered to have completed this work. But before leaving, Wu Yuan handed Jiang Tian a letter, and then said goodbye with a smile. Jiang Tian opened the envelope and looked at it, the content was concise and to the point: develop the glass mirror quickly, I will contribute the money, the patent will be divided in half, and the cost should be low. Jiang Tian was stupid at that time, and said in his heart, what kind of nerve did this Zhang Tao have? Even if you can start producing high-quality glass, you can't just produce flat glass. Fortunately, this is not a difficult problem, and it is not a national task, but I don't know why His Majesty the Emperor remembered this matter during the New Year, could it be that he wanted to make money through the mirror trade? Jiang Tian, who was preparing to perform the procrastination trick against Yang Fengyin, was soon approached by Song Yi, and also told him that the craftsmen in his workshop had returned one after another, and His Majesty hoped to get the results as much as possible.

There was no way, Jiang Tian had no choice but to pack up his luggage and follow Song Yi on the road in the extremely resentful and resentful eyes of the sisters. Since his declaration was spoken, the atmosphere in the mansion has undergone some subtle changes, except for the two Japanese girls who don't know much Chinese, other people with ideas have made all kinds of preparations, in case they bump into Jiang Tian around the corner one day, or accidentally fall into the arms of the master, they can start a new chapter justifiably. After all, there is still a lot of snow that has not melted, and the ground is still very slippery...... It's a pity that these efforts were disrupted by the emperor's secret decree, and they didn't dare to openly insult the king, but they didn't know how to curse in their hearts. Among the school-age women in the entire Jiang Mansion, there are only two people who have not been affected by this trend, one is Xinyue and the other is naturally Linglong.

said that they were not affected, mainly because the attention of these two people was diverted, although Xinyue often contacted Jiang Tian, but the management of the entire Jiang Mansion was busy every day, and in the past two days, she had to personally write a greeting post and hand it to the little maid to deliver, and she was ready to deal with the students who came to pay New Year's greetings, she didn't have that time to think about it at all. Linglong is different, in addition to the fact that she is already the beneficiary of an "accident", the most important thing is that the poems of the emperor and Jiang Tian on the Jinluan Palace have begun to circulate recently in the market that day. She didn't care about how powerful and domineering this emperor was, but Jiang Tian's poems made her chant so repeatedly that she couldn't help herself, and she didn't know how many times she hid in the room and cried. As for why she is so sad, only I know.

Besides, Jiang Tian's side, before the New Year was over, he was "tied" to the workshop by the excited Song Yi, or it is more appropriate to call it the R&D center directly under the Academy of Sciences now. Since the re-location of the two glass kilns, there are only experimental kilns left, so the original busy production scene is gone, replaced by a larger scientific research team, a group of newly graduated senior students of the Imperial Education Institute are interning here, but everyone has a holiday during the New Year, so this extremely wide village seems unusually quiet except for only a few left-behind personnel. But it was immediately broken by the arrival of personnel, especially those in the field of glassmaking, who may have to replace some of the smaller jobs that cannot be found for the time being.

Lighting a fire, heating a kiln, and feeding materials, Jiang Tian doesn't need to care about this, he just needs to deal with Song Yi with his eyes shining, this guy has always maintained this state of excitement since the moment he got the secret order to assist in the development of the glass mirror. The glass mirror is also called the crystal mirror by the Ming Dynasty, it is a rare treasure, the palm size can be auctioned for tens of thousands of taels of silver at a high price, the last time there was a Fanbang ship to bring a book-sized and the frame is only edged with silver, in Hangzhou auction actually bid for 70,000 taels! If Lord Jiang and Jiang Shenren can really make this thing, wouldn't it be equivalent to opening a treasure mountain!

"De Xin, ......" Jiang Tian looked at Song Yi, who was happier than himself: "This method of making mirrors is not so easy, you tell me first, I can be sure to make flat glass with a thickness of three to four millimeters, and the texture should be uniform and smooth and flat!" ”

Being asked by Jiang Tian like this, Song Yi remembered that he was happy too early, in fact, it was right, if this mirror could be obtained lightly, it would not be sold so expensive: "Mr. Hui, it depends on how big you use it, if it is the size of a palm, a craftsman polishes it day and night, and you may be able to get it in a few days." ”

"Hmm......" Jiang Tian thought to himself, this guy must be planning to cast a thicker glass plate and then have someone polish it by hand. Not to mention that this can get a qualified piece of flat glass without wasting a lot of glass blanks, but it is not close to the cheap production required by the emperor's secret decree.

So Jiang Tian asked him to polish a qualified piece of flat glass first, and planned to explain the method of making the mirror first, and as for the rest, he could only think of another way. In fact, as long as you have been to high school, you will know the silver mirror reaction, and you may even have done it yourself. But forget about the other things, where to get glucose, ammonia, silver nitrate, sodium hydroxide, etc.? If there were really these things, he Jiang Tian wouldn't need to spend a lot of time on infrastructure construction. So he planned to copy the secret recipe of the Venetians, and get the most original and worst quality mirrors out first, and it was a big deal to list the formula of the silver mirror reaction and wait for the opportunity to talk about it later.

Waiting for the time to grind the lenses, Jiang Tian was not idle, he first asked the metallurgical team to cast an iron tray, which was not too big and smaller than the basin, but the bottom of the plate was required to be absolutely flat and smooth, and the edge of the plate should be four millimeters higher than the bottom of the plate. After giving this task, he found a grinding machine with the same diameter as the bottom of the plate, and required that the grinding plate holder should be straight and not larger than the edge of the plate. In the end, he found a measuring tool manufacturing team and asked them to make a level, considering the straightness and corrosion resistance of the ruler, and at the same time it was a royal reimbursement, so Jiang Tian asked them to use the copper-antimony alloy that had just been developed, who let there be no aluminum alloy in this year, and even if there was, it was much more expensive than antimony bronze. Then I found a scrapped glass tube, repaired it, filled it with two-thirds of mercury, and finally encapsulated it in a ruler.

Because of the lack of foundation, so no matter what Jiang Tian wants to do, he will find that the tools in his hand are really not in hand, and every time he has to develop new equipment and measuring tools separately like this, fortunately, there is a good assistant of Song Yi, and his invention is not only registered in the register but also lists the use methods in detail, which makes the research and development of the Academy of Sciences more and more handy. Let's talk about the steel ruler made a few days ago, which was originally used to measure the machine, and now it is used to measure whether the cast steel disc meets the specifications. But what was to be made this time was a bit special, so it was only a matter of what was lacking and what team was needed to do the work, and the servants would run back to the city to get the craftsmen back. What the? You said you were going to celebrate the New Year so you didn't go to work? Okay, if you have the ability, you can talk to the emperor about this, Lord Jiang has given up his wife and concubine at home, you dare to say that you are busier than adults! If Jiang Tian knew that those errand servants explained the reason for working overtime, he would probably be able to directly use his right to let this guy clean the toilet. But he also knew that although the development seemed to be quite large, the work was actually quite simple. It's all the emperor who wants to make trouble cheaply. But for the sake of having half of the patents, Jiang Tian had to endure it.

Because there were some rough blanks in the workshop, the glass craftsmen who came in just started polishing them. Within a few days, Jiang Tian was sent a piece of glass that was not much bigger than the mouth of a teacup, and then Jiang Tian only measured it slightly with a ruler, although the subtleties were still a little uneven, but there was no problem. So he took out a porcelain plate. I put several layers of cloth under the saucer, put the glass pieces on the cloth, and took out the tin foil that had been hand-made a few days ago, and covered it with a flat layer on the glass. He took out a bamboo tube from a cabinet where the test materials were placed, opened the plug with bated breath, gently poured a little mercury on the tin foil, and after coating the entire tin foil with a smooth iron rod, he covered the test dish with another prepared saucer, and then he breathed a sigh of relief.

"From today onwards, no one in this room is allowed to enter except me!" After Jiang Tian said this, he opened the door and went out, leaving only the stunned Song Yi, he really wanted to ask if it was so simple to make a mirror? But he knew the answer must be a simple word: "Yes!" ”

I don't know how many days have passed, Song Yi, who was busy directing the manufacture of those new equipment, was called over by Jiang Tian, and then walked into the real room where he had been trying to find out, and he knew that it was time to reveal the answer today.

"I didn't let you into the house before, mainly because the vapor of mercury is highly toxic, and I was afraid that you would be tricked if you were not careful, so I didn't come in until the air was drained, but the reaction should have ended." Jiang Tian said and picked up the covered saucer, indeed most of the mercury evaporated, only a silver bright surface remained, and then Jiang Tian took out a bamboo tube from his arms, after opening it, it should be a kind of lacquer, I saw that he used a brush to dip a little paint evenly on the glass, and then waited for the paint to gradually dry before picking up a clip and picking up the mirror. In turn, let Song Yi look at it.

A silver glittering mirror was made in this way, Song Yi took the mirror and looked at himself carefully, it was really as the rumors said, he really couldn't believe that he had made a glass mirror so easily.

Jiang Tian saw his doubt, but he was not in a hurry to explain: "The mirror obtained by this method is no different from the mirror making technique of Xiyi, and I paint it to prevent the mercury layer from being scraped off." But you remember, this method can only rot in your heart, because I am not the only one who has the patent, but also His Majesty! ”

Song Yi gradually came back to his senses from surprise, this is indeed the case, I am afraid that His Majesty also knows the details of this thing, otherwise he would not ask Jiang Tian for half of the patent generously. So don't say that you don't dare to leak secrets, even if you leak the secret of heaven, who dares to grab business with the emperor? It's just that he recalled Jiang Tian's fanfare for manufacturing those equipment, is it just to cover people's eyes?

"Sir, since this mirror has already been made, as long as it is kept secret, why bother to create those things?"

Jiang Tian grinned bitterly: "It's not that His Majesty is asking for cheapness, let me ask you how much glass you grind for such a big mirror?" ”

Song Yi thought about it for a while: "There are always some waste products, and there are only a dozen pieces on the left." ”

"A dozen pieces!" Jiang Tian's eyes widened in surprise: "It's just that?" ”

Song Yi nodded, thinking that compared with the value of the mirror itself, what if there were more wastes?

Jiang Tian shook his head: "In the glass process, in addition to those special-shaped parts that are too difficult to shape, this batch manufacturing of flat glass is the most difficult. But we don't have such workers, and the ones who are being trained don't have that much ability. That's why I thought I had to re-make it by casting it. ”

"Oh......" Song Yi suddenly realized: "No wonder you asked for that steel plate to be smoothed, it turned out to be for this!" ”

Jiang Tian snorted: "Wrong, that's a tray for grinding." However, this is also a trial production, and it is enough to process some small vanity mirrors. If you want to make a big mirror of your height, we have to think of a new way, but then it's not for me to worry about, it all depends on how far the emperor intends to go. ”

Song Yi didn't expect that he had guessed wrong, but he wasn't angry, after all, what Jiang Tian was going to do was not something he could guess casually. Just holding this sample can already be delivered, he hurriedly ran back to the city to fill out the patent application form, as an assistant, he very consciously contracted these trivial work.

"What! We made it! The pervert could stuff an egg in his mouth, and he was lucky enough to see a glass mirror once, and he thought about buying one to please Linglong, but when he asked about the price, he turned off the future duke.

Song Yi was very satisfied with the pervert's expression, he could see any strange things beside Jiang Tian, it was just a mirror, how could he make a fuss like this, but he didn't notice that Wu Yuan next to him shook his head and smiled bitterly: "I won't tell you more, this mirror will be sent to the palace tomorrow, I can say it first, this is not a thing of the Academy of Sciences, and the patent is half of the Majesty and Mr., if you want to buy it, you can only find them." ”

The pervert blinked his eyes and planned to take the lead, even if he couldn't send it Linglong, it would be good to give it to someone else, this is a pickle girl artifact that can be killed in this time and space. So he was still hesitating where to play before school started, and he turned around and was about to leave, but Wu Yuan reached out and pressed his shoulder, slowly leaned over and whispered: "There are good things that can't be without me!" ”

As a result, the two of them went directly to the workshop, Jiang Tian was staring at the installation and commissioning of the machine at this time, thanks to the launch of several large-scale machining projects, so that the people of the mechanical group can do this kind of thing with ease, and the only difference between this machine and lens grinding equipment is that the mold is different, the size of the equipment is slightly larger, so there is no difficulty in manufacturing, after the use of copper alloy bearings and gear transmission, the durability of the equipment has been greatly improved. As a result, before the equipment was debugged, a familiar loud voice was heard outside the yard.

"Sir, sir! I'm Yijian! Let's go inside......"

Jiang Tian frowned, because the secrecy system is getting stricter and stricter, so it is no longer a place for perverts to come when they want to, fortunately, there is no need to keep these things secret, as long as he does not know the content of mercury dissolving tin, there is no problem. So he gave the order for the two to come in.

"Well-informed enough, you came to see me in such a hurry, you can't be looking for a mirror to please a certain girl, right?" As soon as Jiang Tian looked up and saw Wu Yuan also coming, he just nodded as a greeting, and continued to stare at the workers assembling and debugging.

The pervert couldn't care about these anymore, and asked in a cheeky whisper: "Sir is smart, but don't forget that my family still has a shop in Tianjin, if you can get a few mirrors to sell, wouldn't it be able to shock those peers." ”

Jiang Tian thought to himself, this guy is worthy of being a descendant of Persian merchants, and first thought of monopoly management: "Don't think about beautiful things, this patent is half of one person and half of my majesty, how to sell it is not up to him, at most take care of your family, and sell a few blanks a year at cost price." ”

In fact, Jiang Tian has long thought about how to sell mirrors, this thing is not expensive at all, it is only because of the hungry sales in Venice that the price is high, and the European aristocrats themselves digest those production capacity is a little insufficient, so they can rarely sell to China. But it won't be long before the French start stealing, and then the Germans invent a new silver mirror reaction. Perhaps the Germans at that time lacked business acumen, so there was a massive flood of mirrors. But after all, that's a matter for the future, so let's think about how to make money first. There are very few people in Chinese society who can afford to buy mirrors, so in order to expand the market, it is necessary to lower the existing price, but it must not be too low and unprofitable. Therefore, the easiest way is to dump at a limited low price, such as a palm-sized hand-held mirror, which can completely reduce the price to 5,000 taels, 10,000 taels the size of a book, start with 20,000 on the dresser, and reach the realm of 100,000 yuan for a two-meter-high coat mirror, and the price is different depending on the frame material. This is not only an ultra-low price, but it can also mobilize a lot of local money to buy it, and maybe it can be sold back to Europe, completely crushing the glass manufacturing industry in Venice, because they can't produce more than a table's size of flat glass, so another factor in maintaining this price is to control production.

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