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

Liu Tan is almost used to the fact that every time he wants to do something, he always has to settle the prerequisites.

So when he found that the roughness of the paper was not suitable for drawing, he had already started to think about Cai Lun's method of improving papermaking in his mind.

Although he also wanted to do it in one step, things like kraft paper required a lot of chemical reagents, and these things were even more difficult to make. If he really wanted to make it, it would be impossible for Liu Tan to do it alone. It is impossible for him to find talents in this field without being bald.

Or... find the easiest one.

In fact, he doesn’t know whether Cai Lun’s improved paper is really smooth, but the cost savings is certain. Then maybe he can open another shop of the Four Treasures of the Study, specializing in paper, and the price is not too low, which is half of the current paper. It is estimated that it will make a profit!

Liu Tan was quite ashamed when he came back to his senses. He had already thought of making money before he started to do it, and the main reason was not to make money.

From Kai Guan, he can see that there must be many talents buried in the big man. The specialties of these talents are not eye-catching in this era, and they are even weak, making it difficult to support themselves and their families. In the future, Liu Tan wants to recruit such talents People must support them, and even support their family.

It’s okay for one or two people, but what if there are too many people?

What's more, he will go to seal the country sooner or later, and his parents won't subsidize him anymore. At that time, he will simply eat himself!

What if he can't afford to support so many people if he doesn't find more profitable businesses?

Liu Tan told Miao Rui while thinking, "Go find me something."

Miao Rui asked, "What does Your Highness want?"

Liu Tan recalled what was written in the history books, and then said: "Let's find some bark, broken fishing nets, rags, and hemp rope."

Miao Rui was stunned: "What?"

Liu Tan recalled it again to make sure he was right, then nodded and said, "Well, that's all, let's go find it."

Miao Rui was also a little dazed for a moment, not to mention Liu Tan, even he didn't know where to find these things.

But he didn't look like Liu Tan was joking, so he asked again: "Then...how much?"

Liu Tan also got stuck, thought for a while and said, "Just... let's pull a cart first."

Miao Rui choked, but obediently ordered.

In fact, Liu Tan doesn't know how much is appropriate, but according to his experience in making things, it is basically impossible to succeed once.

When he was engaged in distillation before, he had a good understanding of the still and its principles, and he had been engaged in it for so long. This time...he should be prepared for a long time.

Anyway, during this period of time, Kai Guan has to learn drawing, and it should be almost the same when Kai Guan finishes learning... right?

Before Kaiguan's family members arrived, Liu Tan had to prepare the lesson plans by himself, which was also very difficult.

In fact, during this period of time, Kai Guan was also a little uneasy. He seemed to have nothing else to do except eat and sleep every day. It was as if he had forgotten, and he never said that he wanted to see him at all, which made Kai Guan worry about gains and losses every day, for fear that he would be kicked out tomorrow.

If he knew that Liu Tan was competing with a bunch of junk, he didn't know if he would be disappointed.

Those people under Liu Tan's work ability are quite strong. He ordered them to go down one day, and the rags were brought to him the next day.

Of course it’s tattered, Miao Rui didn’t dare to let the tattered in front of Liu Tan, the bark was carefully peeled off and then cut into pieces of equal size bit by bit, the fishing net was also newly woven, and the linen was naturally a piece of A bolt of new linen.

When Liu Tan saw these exquisite raw materials, he was a little dumbfounded.

But he didn't blame Miao Rui either, probably it was Miao Rui's last stubbornness to keep those rags from entering Liu Tan's sight.

Anyway, they are all used in the same way, and people will naturally learn to use waste in order to reduce costs when promoting them in the future.

What he needs to do now is to process these raw materials first.

To be honest, it is hard to think that these raw materials can be made into paper when put together. First of all, the colors are different. The hemp rope is one color, the linen is another color, and the bark is another color, not to mention fishing nets.

The first thing you can do to get these things to blend together is to fade them first.

There are many fading methods in Liu Tan's mind, but none of them are suitable, and finally he has to choose the one that takes the longest time-lime.

Before fading with lime, he had everything chopped up. I have to say that if it was him alone, the time to make paper must have become extremely long, because it is already difficult to chop these things. up.

However, he has someone available, and even in order to chop these things, he directly set up an assembly line, one wave of people rough chopping, and another wave of people finely chopping.

After seeing those things being chopped up, Miao Rui understood why Liu Tan specifically said that they should be worn out, and the whole ones are useless.

After chopping, the oldest method is soaking, but if you soak it, it won’t last for a month. At that time, he will go to see his relatives, and he won’t be able to use it in time.

So he chose steaming to speed up the process. When the first steaming came out, the effect was not very good. Liu Tan asked someone to rinse it with clean water and continue steaming.

It still doesn’t work after the second pass. The final thing to be obtained in this step is wood fiber, cloth and other things that are gradually decomposed by various fibers, so the next step must be completed after the fiber is decomposed.

Liu Tan originally thought that the continuous cooking could speed up the decomposition of fibers, but he never expected that this step took more than ten days.

In fact, he doesn't know the degree of fiber decomposition to be considered acceptable, but he knows what the paper of later generations will look like when soaked in water, so he simply uses that standard to require this raw material.

In the end, Liu Tan already had a psychological shadow on the steam room where the raw materials were cooked. The smell there was really too anti-human. Liu Tan reckoned that the people who could really work here for a long time must have an underdeveloped sense of smell.

Later, he simply refused to go, and only asked the people below to send him samples to have a look. In order to make up for the suffering of these people there, Liu Tan even gave them many rewards. As a result, not only did no one complain, There are many people who can't wait to go in and take shifts.

On the 13th day of No. [-], the raw materials were finally almost ready. Liu Tan hurriedly asked people to prepare for the next step. If this dragged on, it would really be useless.

In later generations, there will be special machines for thinning, but now Liu Tan does not have it, so he can only choose the oldest method - pounding.

The boiled material is pounded into mud, and then soaked in water. At this time, the material will be suspended in the water after entering the water, becoming a paper fiber suspension, and then pour the suspension into the paper tank.

The paper trough is prepared in advance, made of wood, and the bottom is a gauze made of filaments, so that the water will leak out when the pulp is poured in, and only paper fibers are left on it. Stack them little by little, and press out the water with a heavy object.

At this time, it can basically be seen that it is a piece of paper, but it cannot be used because there is still moisture in it.

But this step is already very simple, just bake it with fire.

Originally, Liu Tan asked people to put the paper on the shelf and bake it around the fire, but he was always worried that it would be unsafe. What if one person accidentally burned them all?

But after thinking about it, he didn't think of any particularly good solution, and finally Pi Gao said carefully: "Your Highness, why don't you build a wall, paste these wet things on the wall, and then bake the wall later, so that you can Did it evaporate while preventing fire?"

After hearing this, Liu Tan couldn't help but slapped his thigh: "Yes, why didn't I think of it, you can do it, old Bi."

Liu Tan said with a smile while throwing a silver bead over.

Turning around, he ordered people to build a house about one person high, named it the baking room. No one was allowed into the baking room, and it was specially used for lighting fires, and the walls were all around, so the cement came in handy.

The paper that has not yet dried out is all pasted on the wall one by one. Because of the water, it is basically effortless. When it is about to dry, it is peeled off and put aside to dry in the shade.

It takes about 20 days for a piece of paper to be formed from start to finish.

In the end, when Liu Tan got the finished product, he found that although it was far from the white paper he had imagined, it was still a bit rough. It can be seen that there are disadvantages in eliminating the soaking step and rushing to work.

However, it is much better than what he is using now. If the paper cannot be made, I am afraid that he will have to paint the crown on the cowhide by then. As for the silk fabric...it is too expensive to preserve, let alone Even a big man can't draw all the maps with silk fabrics, how much will it cost!

Although the waiting time was long, he was not idle during these 20 days. Kai Guan is now a blank slate in terms of drawing, and he still needs to teach him the basic knowledge.

When Kai Guan was summoned by Liu Tan to study, he was very excited.

Even though he was 12 years older than Liu Tan, he didn't think there was any shame in studying with Liu Tan.

It should be the addiction of this Mr. Wan, he can act with him, and the royal family always has more books than the common people, and maybe he can read books that he has never seen before.

After Kai Guan was mentally prepared, he went to the room specially designated by Liu Tan as his classroom. As soon as he entered, he saw a huge wooden board standing vertically inside, and the wooden board was painted with a layer of black paint. Why do witchcraft prepare the same.

Seeing him coming, Liu Tan raised his chin and said, "Sit."

Kai Guan sat down tremblingly and asked, "Your Highness...what does Your Highness want Cao Min to learn?"

Liu Tan stood up and wrote twelve characters with a newly made lime pen: Fen Shou, Zhun Wang, Dao Li, Gao Xia, Fang Xie, and Yuan Zhi.

After Liu Tan finished writing, he nodded in satisfaction. Sure enough, he is more used to hard pens. This Hanli is much more beautiful than what he wrote with a brush.

And Kai Guan, who was sitting below, was in a daze at this moment: What is this all about?

The author has something to say: Liu Tan: Unexpectedly, I have already started to be a teacher before I did anything.