The days when I pretended to be a cat in the Forbidden City[Comprehensive]

Xun Qing was not interested in knowing how the students came up with this name, he just wanted to know how the paper was made, how much it cost, whether it could be mass-produced, and whether King Qin intended to promote it.

Lu Xiaoan was carried all the way to the room by his husband and sat down. He put his hands on his knees and looked very cute. He told all the things that could be said from the beginning to the end.

In fact, the matter started when the construction of the Zhengguo Canal started more than ten years ago. The area where the Zhengguo Canal runs through is almost full of saline soil.

The salinization of the soil in this area is entirely caused by excessive drought.The terrain of the Guanzhong Plain is flat, and it has a continental climate. The winter and spring monsoons come from the northwest unimpeded.

Strong winds, little precipitation, no rivers, and the destruction of the soil layer by the farming environment are the reasons why this apparently fertile plain has spots of ringworm-like saline-alkali land.

Especially in the area that Zheng Guoqu passes through, all of this generation are the most serious places, so serious that the government allows the people to give up farming and let them recover by themselves.

When repairing the canal, Lu Buwei adopted his son's suggestion and dug up the land with the most severe brine on the surface and transported it away, then turned up the lower soil, and then cultivated the soil for planting, which was effective for some plants with not deep roots. very good.

As a result, when the canals were filled with water, the area was revived immediately and became arable land.

And the soil that was transported away was not thrown everywhere, but was sent to one place for cleaning. Saline-alkali land.So the only solution that can be thought of is to soak the salt in the soil with water, and then scatter the washed land into the mountains.

And washing the soil and drying it in the sun can get a little salt. Of course, this is too inefficient, but it is better than nothing.

When dealing with the water soaked in soil, some people found that the water was slightly corrosive, and many farmers who were in charge of stirring had signs of broken skin and rashes. At first, they thought it was due to concentrated salt water. It was later discovered that this was because of the water itself.

This is bad news for the farmers, but most of the people in charge of handling the fields are forest householders in the mountains. For them, the soil is corrosive!In particular, the corrosiveness was just enough not to damage the skin. After the application, the local people immediately used the water to nitrate the animal skin, and the effect was outstanding.

After the report was published, everyone was also very happy. This can be regarded as waste utilization, and it can also generate income. Therefore, the village responsible for disposing of these soils built a water storage pond. Every time the soil was washed, the water was placed in this pond to let the sun bask in it. , use while evaporating.

After a few years, the construction of the Zhengguo Canal was at a late stage, and the saline-alkali soil was no longer sent over. The water in the pond naturally decreased in height and concentration, and an accident happened.

A woman from a hunter's family soaked her skin in the water halfway and left because she had something to do. Before she left, she didn't say anything to her man. The man didn't know. He saw his daughter-in-law was half done and took it. He didn't bother to get water. So he sprinkled a handful of quicklime into the water in order to tan according to the old method, but after a while, the man felt that his hands began to heat up, and he immediately knew that it was not good, it was burning his hands.

Orion has more or less such experience in tanning leather for a long time. Occasionally, there will be too much lime poured in. He rushed into the stream for a night. I didn't suffer less, and half of my family's wealth was piled up in order to cure my hand.

This tragedy naturally aroused the vigilance of the surrounding Orion. At first, everyone thought that there was a problem with the salt water. However, after questioning, no one in the surrounding area who had tanned the water had such a reaction.

That's right, the problem is the quicklime.

The farmers discovered that when this kind of salt water and lime come into contact, there will be a very strong salt water. It only takes a while to soak the animal skin with this kind of water, and all the hair and grease will fall off. What is left after the first step is the flexible cortex. Of course, if one is not careful, the cortex will also be rotted, which requires great care.

The efficiency of using this liquid to treat animal skins can be increased by more than [-]%, and the product quality is particularly good!The hunters who dealt with these lands reported this immediately after discovering this. At that time, the capital water monitor had passed on to Lu An. After hearing the news, Lu An was very interested and immediately led his subordinates to further sample and study.

And the strong corrosive liquid they finally made was sodium hydroxide, which was famous in later generations.

What the farmers don't know is that in their hands, the two alkalis of the three acids and two alkalis that support the chemical industry have passed through once.And what they unintentionally used was the famous caustic chemical method for industrial soda production in later generations.

Most of the saline-alkali soil contains two components, salt and alkali. Salt is chloride ion, the main representative is sodium chloride, which is common salt, and the main component of alkali is sodium carbonate, and a small amount of sodium bicarbonate, commonly known as soda and baking soda.

And when sodium carbonate aqueous solution and excess calcium hydroxide meet together, causticization reaction will occur, and the strong alkali generated is sodium hydroxide.

And the most wonderful thing is that the sodium hydroxide aqueous solution will turn into powder after evaporation, and the previous precipitate will become lime after being dried and calcined, and can be added to the reaction again.In addition to the raw materials it needs are also precious alkali, both the production method and the cost are quite low.

What will sodium hydroxide do after it is invented?If it is modern, it will be put into industrial production immediately, but in Qin State, it was only used for tanning leather at that time.

Leather is the main component of armor in Qin State. Qin State itself has a great demand for this material. To make animal hide into leather that can be used as armor, the key step is to remove its epidermis and process it to make it Partial materials have higher toughness and corrosion resistance. In the past, it took a lot of time to just peel off the fur and grease, and among them, degreasing is the most important thing.

This is also an important reason for restricting the output of leather, and it is also an important reason for restricting the number of armors.

But people found that as long as some caustic soda is put in the water, the oil can be removed very cleanly.

In order to study the relationship between caustic soda and grease, Lu An conducted a series of experiments... Finally, he found that the key to cleaning the grease is not caustic soda, but a paste made by mixing caustic soda and grease. After the two substances were separated and compacted to dry, it was confirmed that it did have a miraculous effect on cleaning, but the smell was a bit unpleasant.

This thing named soap can wash everything, but it hurts a little, but compared to directly using caustic soda, the degree of damage is still acceptable.

And as if in response to the saying that all things must be mutually restrained, some people soon discovered that when making soap, the sweet liquid after filtering out the suspended matter has a bit of oily properties, so it is called glycerin-about these How did people discover this, Lu An didn't want to know at all.

However, after testing, this carefully extracted liquid has a very high skin protection ability, and the dry and peeling skin will be much better the next day after a night of sleep.

At first everyone thought it would have a miraculous effect on wounds, but later it was found that it was only effective on healthy skin, especially dry skin.

Should it be said that extremes must be reversed?No one could understand why this liquid, which can easily rot a hole in the leather, can be turned into a substance that has a miraculous effect on moisturizing after several treatments.

It's quite tasteless, and after finally confirming that this thing can't give people any surprises, I'm quite disappointed as a technical geek.After confirming that the liquid was really harmless, Lu An took it home.

It may be that women are talented in this area. When she heard that this product is a by-product of soap making (suspected) and can moisturize, Madam Lu took it over without hesitation. Then, under the shocked eyes of the two men at home, she reconciled After spraying flower juice, dew, honey, egg white and other substances on the face, after washing off, the skin was extremely clear and smooth. At first glance, it seemed to be a few degrees whiter, which made Mrs. Lu very happy.

In Xianyang, the wind is strong and cold in winter. Even a lady who doesn’t go out in winter will inevitably suffer from dry skin. No matter how outstanding her appearance is, chapped skin is also a huge minus.

Lu Xiaoan, who made good moisturizing products for her mother, was immediately embraced by Mrs. Lu's love, and then Mrs. Lu left Lu Buwei and her son, who had finally stopped working overtime, to go to the palace to find Zhao Ji.

This winter was exceptionally cold, and Mrs. Lu and Zhao Ji were too abnormal to be able to wear a moist and smooth face in the winter, which naturally attracted the attention of many female relatives. Therefore, without asking, the substance glycerin was immediately available in the female family. It has become popular in the circle of people, women don't even ask the price, they just throw money at it, and the demand is so big that it alarms the higher-ups.

Yiren summoned Lu An into the palace, but what Yiren cared about was not glycerin, but the production of soap and caustic soda.These two things can promote the output and quality of the armor, so there is no room for him to be indifferent.

For now, the output of caustic soda depends on the alkaline soil. Although Xianyang has a lot of saline-alkali soil, there is too much movement in mining these soils. Now I don’t know how many eyes are staring at Qin.

There is no canal project in Qin State now, if it still collects saline-alkali soil, it will definitely attract the attention of others... Therefore, there must be a bigger news than Qin people's collection of saline-alkali soil, so paper came into being.

The alkaline water after leather treatment was used to make paper, which is completely waste utilization. I didn’t expect that the presence of paper as a by-product was so high. No one cared that Qin had been digging saline-alkali soil everywhere.

But none of this can be said.

The production of armor is the secret of Qin State. With the help of caustic soda, Qin State’s leather manufacturing speed has increased by a step. It seems not much, but in the context of the whole country, this number is extremely terrifying, and this number is different. No one wants to let others Know.

Facing Mr.'s inquiry, Lu An could only estimate a number that made Xun Qing gasp. Seeing this, Lu An's hands and claws hidden in the sleeves of his robe quietly retracted, and said, did you talk too much? ?

On the contrary, there are too few.

The most important value of a book as a carrier is its convenience and ease of carrying. Now, on the stone tablet at the gate of Qin Guoxue Palace, students take turns to smear ink and stickers on it day and night. These papers are dried, cut and bound to form a book. .Usually, it takes four or five days to complete the copying of a book, but now even if only one person does it, it only takes four or five hours.

Xun Qing took a breath slowly, then he immediately got up and went back to the house, his elderly body walking extremely vigorously.Just when Lu An was in a daze, Wei Liao came in from the outside, and seeing Lu An alone in the hall, he couldn't help raising his eyebrows.

He obviously didn't say anything, but Lu An seemed to understand what he was talking about. He turned his head and said to Wei Liao who was sitting next to him: "Just halfway through the conversation, the master went back to the room."

"What did you say?" Wei Liao turned his head slightly to look at him, and saw that his junior brother showed a little troubled expression: "You are talking about paper..."

After listening to the topic he repeated, Wei Liao pondered for a while and then said in a low voice, "Sir, you should go to get your belongings."

"What!?"

What, what are you doing with the money all of a sudden! ?Lu An's eyes were wide open, and when he was about to stand up to look for Xun Qing, Wei Liao grabbed him and threw his whole body into Wei Liao's arms. Wei Liao caught him upright, He straightened the man upright, patted his back, and said softly, "Don't worry."

urgent……?Lu An blushed, he, what is he in a hurry for?What nonsense are you talking about, brother!He was obviously pulled by someone, but it seemed that he was throwing himself into his arms!

After Lu An was sat upright, Wei Liao said in a low voice, "Don't worry, Mister probably wants you to help him print the book."

Oh, it's this one. Don't worry.

Lu An's face became serious a little bit, a little bit ashamed, and also a little bit annoyed. He felt that his senior brother must have done it on purpose. A few days ago when he told his senior brother that he was going to be crowned soon, Wei Liao became special. Weird!

In the past, the senior brother followed the path of a modest gentleman. When he didn't wear armor, he looked like a romantic man. He often refused the invitations of other girls with a deadpan expression, and he didn't have much physical contact with anyone.

Lu An was originally an exception. They had grown up together since they were young, and some intimate habits had been formed. He was also one of the few people in Wei Liao who could enter the attacking range of his halberd after he fell asleep.

Unexpectedly, Wei Liao suddenly began to distance himself from him, not to say alienation, but to deliberately avoiding his physical contact.

On weekdays, talking and getting along with each other is the same, and sometimes he will say some inexplicable and intimate words, but when he habitually reaches out to grab someone's sleeve, he suddenly takes a step back, and when he is sweating and wants to drink his water, he suddenly reaches out Suppressing the cup, being too lazy to ride a horse and wanting to go to work with Duoduo and being carried off by someone, etc., etc.!

Lu An was completely baffled, but when he asked him, he just looked at himself without saying a word.

Lu An looked back aggressively at the beginning, but after staring at his senior brother's dark eyes for a long time, he always felt guilty for some reason, and in the end he had to withdraw his gaze every time, which was very embarrassing.

But what can be done to lose face?Wei Liao is his senior brother, and Lu Xiaoan has been used to being supervised by his senior brother since he was a child.

In fact, Lu An occasionally secretly felt that his senior brother might think that he had grown up and didn't want to take him anymore, hmph, he was very angry.

In addition to anger, there are also some inexplicable sour emotions.

Just when Lu An was so angry that he wanted to move away, Xun Qing walked in. As Wei Liao expected, Xun Qing dragged a heavy box over, then patted the box and said to Lu An who came over to help, " An'er, come and help me see how many books can be printed with this money?"

Lu An silently glanced at a box of gold rewarded by the King of Qin, murmured for a while, and finally didn't say "Even if the husband doesn't give you the money, the king will print the book for you, as long as you are willing to advertise to Qin State".

In the end, of course Lu An didn't accept the box of gold, because Xun Qing hadn't written a good book at that time, so of course he didn't need money or anything.Moreover, Lu An also told his husband that there is still a problem of writing tools to overcome when writing books with paper and printing books, and it is still too early to open the printing of books.

The ink currently used in the state of Qin is actually a natural dye that is ground into natural charcoal and mixed with water. This kind of dye is okay to use on bamboo slips, but it will immediately paste when used on paper. It is fine when printing. The bristles won't get too much ink when standing on the Yangwen, but it's torture when writing.

So Lu An planned to find a way to improve the ink first, not only the ink, but also the pen. The brushes used now are made of pig bristle hair. It is too hard to write on paper, and it will easily tear the paper.

All in all, Mister still has plenty of time to write a book!

Xun Qing smiled slightly to show that he understood, and was so kind that he told the students that he would try to find other ink sticks through his method, and try to solve the problem of ink and paper mismatch.

However, after seeing off his students, he unfolded the bamboo slips and started writing without any hesitation.When the number of lifespans in life is exhausted, no one knows when his lifespan will come to an end, so it is better to hurry up.

And Lu An came here to deliver papers and invite his husband to write manuscripts. He was very happy that his goal was achieved. He immediately forgot the unhappiness just now and then went to Wei Liao's carriage. When I got into the carriage, I thought for a while, and left him the seat, and then said that I wanted to ride a horse, so Shi Shiran got on the Duoduo horse.

Duoduo glanced at his little dad's eyes that were already burning, and let out a light breath, not understanding what the two dads were arguing about.

But what can he do, he is just a horse that can't talk, he can only approach the carriage intimately.

Wei Liao's carriage is a popular open-top carriage in Qin State, and the two of them can chat without hindrance when walking beside him. He got out of the carriage steadily, bowed to Wei Liao respectfully and politely to say goodbye.

Wei Liao looked at the figure of the young man who left without looking back, and smiled wryly.

When he turned his eyes away, he met Lu Buwei who was standing at the door. However, when he saluted from a distance, Lu Buwei returned half a salute and then turned around to enter the hospital. Obviously, he didn't intend to talk more.

Wei Liao glanced at the closed gate of Lu's house again, tightened his grip on Duoduo's rein, then let go and went back to the courtyard.

When he went back, Lu Xiaoan was in a terrible mood.

Brother, what's going on?How can a picture that is about to break up just say it clearly, the big deal is that everyone will fight together, it is so annoying to be so vague.

Lu An was so irritable that he paced back and forth in the house, and finally couldn't hold back his excitement, so he dug out several jars of wine buried under the pear blossom tree in his yard, thinking that the pear blossom wine was drinkable, why don't you go drink it up with your brother? Get drunk and ask again...

No, wait, why should I regress?

Lu An and the pictures on Jiuweng stared wide-eyed for a while, and finally decided not to send them over!I just drink it myself, and sending it away is also a waste of things.

That night, when the golden toad was in the sky, it was a good time to appreciate the moonlight, but people with troubled hearts couldn't see it no matter how beautiful the scene was.

Wei Liao tried to force himself to read the book of war, but at the moment his mind was full of his junior brother's tight lower lip before he entered Lu's house, he was a little lost, he had never seen Lu An angry like that before, but...

Lu An is about to reach the crown.

It's not that he wanted to force it, it's just that the appointment time with Mr. Lu was not far away, he was indeed a little impatient, and was thinking about going to apologize tomorrow, but he heard the sound of a zither coming from the next door, which he had never heard before tune.

While I was in a daze, I heard a sentence, "Yesterday was like the eastward flowing water, so far away from me, I can't stay. Today disturbs my heart, so worrying."

It was Lu An's voice, but his breath was a little messy. Was it...drinking?

Wei Liao was about to go out to find someone, when he suddenly heard a sentence, "So only the newcomers laugh, but who hears the old ones cry? The word love is so hard."

Wei Liao was stunned.

The author has something to say:

The lyrics are from "A Dream of Mandarin Ducks and Butterflies", it sounds so good!

You never know how deep Xia Miao's pool is.You will never guess how bad Xia Miao's wine is!

Someone got the chemical formula yesterday right! !

Sodium carbonate + calcium hydroxide produces sodium hydroxide plus calcium carbonate precipitation!

Not all saline-alkali soils are composed of sodium carbonate and sodium bicarbonate, some are salt, and some are nitrate.This is cheat =w=

Some babies may have said that since such a saline-alkali land can also be used?It is possible, and some areas with particularly severe salinization also pick up surface materials to replace them during the Chundong period, but compared with farming, these harvests are really too low.

Moreover, China has alkali mines, so it doesn't really care about such a loss of soda ash.

Soda ash itself has other functions, and it is actually quite uneconomical to use it as sodium hydroxide.

It is said that sodium hydroxide is rarely used when tanning animal hides, and soda ash is usually used, so the hunters are doing it right.

The purity of sodium hydroxide extracted in this way is very low (because the content of sodium carbonate itself is low)

Glycerin is a by-product of the soap saponification reaction industry. Glycerin is the base of many skin care products. It is indeed moisturizing and magical, and it is pure and natural and sweet... Well, it must be mixed with water when using it.Otherwise it will suck moisture from your face.

——BY, the author who used Kaiserol when I was a child.

Calcium hydroxide is also alkaline and can be used to make paper, so it is feasible in engineering theory, but in fact... will it be a little stinky? ...Forget it, ignore it.