I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

No matter what Liu Tan said was true or not, Lu Xuan pretended he didn't hear it.

In the education Lu Xuan received from childhood, to love someone is to give money and status to the other person. The higher the status, the more money you give, the more you can show your liking.

Although material things cannot represent all love, if even material things are not provided, then there is not much love.

Lu Xuan really loves Liu Tan, but if he isn't, he might set his sights on the Central Plains with his abilities.

Why do you have to fight the Huns?The Huns are so fierce and have few resources.

But for Liu Tan, he would rather give up such an ambition.

This is a kind of love he loves, but he feels that it is not enough to express, but what is Liu Tan lacking?

In terms of status, he is a prince of the Han Dynasty, and the fiefdom is chosen by him, so don't compare him, anyway, from the empress to the prince, he is very fond of him, and the two most powerful princesses among the princesses also like him very much .

In terms of money, not to mention the fact that Liu Che and Chen Ajiao stuffed him with money from time to time, Liu Tan himself has a copper mine, and the broken evil gold produced by the broken evil gold mine has a price but no market.

Lu Xuan felt bitter, what did he have?He just has a little gold.

So even if Liu Tan doesn't need it, he will give as much as possible, at least he has to express his heart.

When Liu Tan saw that Lu Xuan didn't speak and turned his head to fuck, he knew that the communication had failed, but he didn't say anything anymore, but continued to smash with his candle.

To be honest, until now Liu Tan hadn't figured out how to solve the problem of the solidification of the candle.

He knew that if he wanted to make candles out of tallow, he had to use sulfuric acid.

However, the problem is that even if he knows how to make sulfuric acid, there are many other steps in the middle, and each step is very difficult for the current level of technology.

But this is based on the fact that he clearly knows how to make sulfuric acid, so the question is, does he know?

No, he doesn't know.

In the end, he could only produce soft candles, that is, after the oil was reacted with a strong alkali, not only soap but also glycerin was obtained, and the main component of the candle, stearic acid, existed in the form of glycerin.

Then use the wick to immerse in stearic acid over and over again, wait until it condenses and immerse again, wrap layer by layer, and finally form a candle of the specified size.

In order to fix the shape of the candle, Liu Tan finally asked someone to wrap a layer of bronze skin on the outside. Anyway, this thing can be reused, so there is no need to worry about waste.

In the process, Liu Tanshun even improved the wick.

Because Liu Tan remembers that the traditional wick needs to be cut continuously because of insufficient combustion, but it is not needed in later generations because the wick has become three strands of rope, so that during the burning process, the three strands of the wick will hang down due to separation. The center of the candle burns more fully.

Liu Tan simply adopted this method.

There is no way, this lamp is inside the lantern, so we can't send people to fish up the lantern and cut the wick from time to time, right?That too ruined the viewing atmosphere.

After making the candles, Liu Tan experimented. Although the candles made of stearic acid were softer than the candles in his impression, the advantage was that there was no black smoke from burning oil, and the burning was more complete and the flames were brighter. bright.

Liu Tan was so happy that he directly replaced all the lamp oil in the entire palace with this kind of candles.

After the candle issue is resolved, the lantern issue is half resolved.

The other half is to calculate the amount that can make the lantern burn overnight.

He doesn't need to take care of this. Naturally, someone will help him take care of it.

The root cause of saying that the issue of the lanterns was half resolved is what I said before - people can't watch the lanterns in the cold wind.

Even if it looks good, it will be distracted by the cold.

Yes, Liu Che's clothes must be warm, but he has to show his face, right?In the northern border country in winter, the wind can make people doubt life—well, this is what Liu Tan heard, after all, he didn't spend much time in the northern border country last winter.

Therefore, glass windows are the most important thing. At this time, the experiment of crystal glass has also been carried out to a certain extent.

Oh, the crystal glass is the name given by Liu Tan. The crystal is real, but the transparency of the glass...is always unsatisfactory to Liu Tan. It is not transparent enough if it is made thick, and the things on the opposite side through the crystal are somewhat distorted.

Let’s make it thinner. The hardness of the crystal is not enough and it is very fragile. This made Liu Tan feel very worried, so he began to try to add other things to it to increase the hardness of the crystal glass.

Regardless of the final result, we can only ask the craftsmen to be careful, be careful when making it, and be more careful when installing it.

Liu Tan found that he missed glass more and more, especially tempered glass. Before, he thought that there was no problem without glass, and his living standard was not affected in any way.

However, the problem now is that he finds that many of the things he wants to do cannot do without glass.

The first is the lantern. If there is glass, he can make more and more beautiful lanterns.

Then the most important thing is the glass window, which can be said to be the most practical thing.

It's just that the existing technology can only produce colored glaze.

Although these two seem to be similar things, in fact, the glass that Liu Tan knows is soda-lime glass, while colored glaze is lead-barium glass. The chemical composition is directly different, and even if you are exhausted, you will not be able to burn it. The same effect comes.

Moreover, lead-barium glass contains heavy metals, so it is impossible to use it as tableware.

It's just that Liu Tan remembered that the main purpose of adding those things was to lower the melting point of quartz sand, because the melting point of quartz sand was too high to be reached under the limited level of ancient times.

In the past, even if Liu Tan had this idea, he just thought about it, and he didn't have much interest in making colored glaze.

But now that he has coal, he can try it.

Liu Tan remembered that in his previous life he had seen someone make glass out of sand mixed with other things, and couldn't help but feel a little eager to try it.

It's just that although the land around Shuofang City is barren, it's not really sandy land.

Liu Tan asked someone to get it, mixed it with soda ash and limestone, and asked him to go ahead and fire it.

The final firing result is not satisfactory. In the final analysis, the content of soil in these sands is greater, and the sand has not been completely sanded, so the content of quartz stone is insufficient.

But wanting pure sand... Liu Tan looked at the map, reached out and touched Damo, then turned his head and said, "Send someone to tell Li Buyi to help fetch some sand from Damo."

Huo Guang, who had just stepped into the main hall and was about to talk to Liu about his work, paused when he heard these words, and suddenly felt a little headache: Is it enough to play with mud, and start playing with sand again?