The time has come, March 12th.

Guan Yu must have never come into contact with strong alkali. Li Mengxi said that strong alkali burns his hands, and when it drips onto his hands, it rots his hands, which is very scary.

Guan Yu was as brave as a tiger. The more powerful Li Mengxi said, the more terrifying he became, and the more Guan Yu wanted to try it.

Guan Yu rolled up his sleeves and told Li Mengxi to come. If Guan frowned, he was not a man.

Li Mengxi reluctantly took a wooden stick and dropped a drop of strong alkali on Guan Yu's hand. Soon, Guan Yu felt the power of the strong alkali.

Guan Yu looked at the red and hot spot on the back of his hand. He nodded and praised, "It's really domineering."

After receiving the water from Li Mengxi, Guan Yu used the water to wash away the lye on the back of his hand. He asked what the so-called strong alkali could be used for.

Based on Guan Yu's understanding of Li Mengxi, anything that comes from Li Mengxi's hands will be of great use.

"Strong alkali is used to make paper." Li Mengxi said.

Then, Li Mengxi told Guan Yu that in addition to bark, herbs, and vines, tree trunks were also excellent paper-making materials.

This is the fourth largest source of papermaking materials.

Li Mengxi said that the tree trunk material is too tough, and without strong medicine, it is difficult for fibers to come out.

Therefore, ordinary plant ashes cannot be boiled into wood pulp. Only after a strong alkali is created can pulping from wood chips be successful.

Li Mengxi said, "Among the two categories of grass and trees, woody paper is tough and delicate, the best, but the bark is scarce; herbaceous paper is rough, fragile, and of poor quality, but the sources of herbs are vast.

Although combining the advantages of the two, mixing bark and straw pulp can improve the paper quality, this is a makeshift solution after all.

Once a strong alkali is released, the dry wood of trees can also be used to make paper. The bark of a big tree weighs thirty to fifty kilograms, and the trunk material is more than three to five hundred kilograms. With just a strong alkali, the base material for making paper can increase by ten

More than twice as much.”

It can be said that after the success of the wood pulp experiment, it was a huge revolutionary technology for papermaking.

At the end, Li Mengxi talked about the huge pollution caused by papermaking, and talked about preparing to move the papermaking industry elsewhere. He mentioned that strong alkali papermaking must be washed, otherwise it will burn people's hands. However, after washing, the pulp will become loose again, and glue may be needed to bond it.

fiber.

Li Mengxi asked, "General Guan, do you know what kind of glue is easy to get? Is it leather glue? Isin glue? Or tree glue?"

Guan Yu stroked his long beard and thought, "Maybe it's because there's a lot of gum."

Li Mengxi thought about it, and it was the same. According to the transmission of abilities, and the food chain, in nature, there are far more plants as producers than animals.

Therefore, there must be far more trees producing gum than fish, and far more than cattle, sheep and other animals.

Besides, animal hides are also used to make leather armor and coats, and isinglass is used to make boats. These two sources of glue are very useful, but tree gum does not have so many uses.

, can be used to make paper easily.

Li Mengxi was thinking about whether to plant some trees or something so that he could use glue to make paper. At this time, Guan Yu said from the side, "Xi'er, when it comes to gluing things, Nianhu can do it."

Hearing this, Li Mengxi immediately raised his head and looked at Guan Yu in surprise.

Then, Li Mengxi came to his senses and said, "Yeah!" His eyes widened. When it comes to glue, who said that only professional glues such as isinglass, tree glue, and leather glue are glue? Take flour and dot the lake, it will be as sticky.

Li Mengxi couldn't sit still anymore. He stood up and ran out.

Seeing Li Mengxi leaving in a hurry, Guan Yu stopped reading the Spring and Autumn Volume he had just opened and put it down casually.

After getting up, Guan Yu followed him out.

——

There is not much white flour in the army, and the steamed buns can hardly be steamed.

Li Mengxi carried half a bag of white flour on his back. The flour was so heavy that he couldn't carry it anymore. He was carrying it with a squeaking sound and his neck was stretched out.

I was walking halfway when someone bumped into me and I quickly came over to take it. The person who came picked up the flour and said with a smile, "Where are you going? I'll carry it for you."

Li Mengxi didn't know the person in front of him. There were so many people in the army, how could he know them all?

Li Mengxi bowed his hand to the kind man and said, "If you have anything to do, go to the craftsman's camp."

At the craftsman's camp, Li Mengxi found the papermakers and gave the flour to the craftsmen. He asked the craftsmen to clean the pulp and then mix it with flour to see if the paper produced would be better.

The papermaker took the flour and opened it to see the white flour in the bag. The craftsman glanced at Li Mengxi and hesitated to speak.

Papermakers feel that using white flour to make paper is a bit wasteful.

The craftsmen were busy, and Li Mengxi watched from the side.

In fact, at this time, testing is still needed. Since flour is to be added to the paper pulp, is it better to add cooked flour or raw flour? Also, how much flour is appropriate to add? There is no doubt about adding flour to water.

, will make the water more viscous and the pulp more viscous, thus making the paper fibers more firmly bonded.

Although flour is good for papermaking, if too much is added, there will be adverse consequences.

Furthermore, different pulps, pulp boiled from bark, pulp boiled from grass and trees, have different concentrations. It is not certain what proportion of flour should be added to various materials.

Li Mengxi clearly knew that it was necessary to try the step of adding flour to the paper pulp, but he didn't really want to try it. During this period of time, he was testing again and again. He had done too many experiments and was a little tired.

Footsteps were approaching from behind. Looking back, it was Guan Yu who was coming. Li Mengxi smiled at Guan Yu, turned around and continued to stare at the work of the craftsmen.

According to the requirements, the papermaking craftsmen filtered a pot of newly boiled pulp through water several times. Then, when it was time to add white flour, the craftsmen cherished the white flour, poured out half of the pulp, and prepared to add a little flour.

[To be honest, I have been using Yeguoyuedu to read and catch up on books recently. I can switch sources and read aloud with many sounds. Yeguoyuedu is available for Android and Apple.]

A craftsman took two handfuls of white flour and sprinkled it into the paper pulp, and then made an unexpected move. In Li Mengxi's impression, after people held the noodles with their hands, they usually clapped their hands to wipe the flour off their hands, but he saw that the craftsman

After holding the noodles, he stretched out his tongue and licked his fingers, trying to lick away some flour stuck on his hands.

Li Mengxi felt this was disgusting and a little sad.

What on earth did I go through to cherish food so much?

This chapter is not finished yet, please click on the next page to continue reading the exciting content! The craftsman was licking, and suddenly found the military advisor staring at him. The craftsman blushed, put down his hand in embarrassment, and wiped his hand on his clothes awkwardly

wipe.

As the saying goes, don't look at anyone who is not polite. Li Mengxi turned his eyes away without leaving any trace.

(I don’t know how much flour is consumed,) Li Mengxi thought to himself, (if the consumption is too large, then there is no need for flour.)

Although flour can slightly improve the quality of pulp, the value of flour and all grains should not be measured by money and economy. Food is the most basic material.

The craftsmen sprinkled flour into the pulp and mixed it with sticks. Then, the craftsmen began to use the pulp mixed with flour to make paper.

The craftsmen obviously don't know what the contrast method is. They are making paper here, and the half-pot of original pulp left on the other side is left unattended.

Li Mengxi waved to a craftsman who was watching, and the craftsman came over. Li Mengxi pointed to the empty half pot of paper pulp and told the craftsman to make some more paper.

Soon after, two kinds of paper pulp, one washed with water and not sprinkled with flour, and the other pulp sprinkled with flour. After the paper made from these two pulps was dried and shaped, the craftsmen brought the paper over.

Li Mengxi and Guan Yu checked the quality of the paper together. Judging from the appearance, Li Mengxi was surprised to find that the paper with flour looked much whiter. This discovery opened up Li Mengxi's thinking. When paper was made in the past, bark and herbal paper

There are not many noises, and activated carbon is enough to decolorize the pulp, so there is no need to add any white color enhancer.

However, with the birth of wood pulp paper technology, the color in the trunks is very dark and messy, and activated carbon alone is no longer enough to decolorize.

Therefore, the coloring and whitening technology, which was originally useless, is very necessary when making wood pulp paper.

There are two pieces of paper, one made from original pulp and one with flour added. Checking the quality of the two papers, it is obvious that the paper with flour added is not only whiter, but also tougher.

The test was successful. After adding water to the flour, it will turn into a flour lake. The flour lake has a certain viscosity, which can make the fiber combination stronger and tighter, thus making the paper fibers tighter and more delicate.

After thinking for a while, Li Mengxi took out the ink pen from the bamboo tube at his waist and made a few random strokes on the two pieces of paper.

This was originally just a temporary idea, done casually, but after a while, as the ink stains smeared, an accident occurred.

Li Mengxi found that the ink on the paper with flour was more smudged, while on the other hand, the ink on the paper without flour was more concentrated.

For paper, ink smearing is a disadvantage in most cases.

Li Mengxi couldn't help scratching his head. The purpose of adding flour was to make the paper more delicate and tougher. As a result, it was made a little more delicate and a little tougher, and at the same time, the waterproof performance of the paper was reduced.

This is equivalent to adding some advantages and adding a disadvantage at the same time.

The craftsmen stood there, watching eagerly, not knowing whether their work was good or bad.

Li Mengxi noticed this, and he assigned the craftsmen a task. He asked the craftsmen to add more flour to the paper pulp to see what would happen if too much was added.

The craftsmen went back to their business. Li Mengxi discussed with Guan Yu. He felt that flour was not good. Although flour could whiten and toughen it, it would reduce the water resistance. He asked Guan Yu if there was anything else that could replace it.

Guan Yu thought for a while, "How about lime?"

"Uh." Li Mengxi raised his head and looked at Guan Yu doubtfully. He had been using this lime thing all the time.

Guan Yu thought for a while and explained, "Although lime does not stick to the lake, lime can whiten it."

Guan Yu looked at Li Mengxi and asked, "Xi'er, didn't you say that the color of the wood pulp paper is too dark? You might as well add some white ash to the wood pulp to make it whiter."

Li Mengxi thought thoughtfully, and thought the same thing. Compared with flour, lime is definitely cheaper. Although lime is not sticky, it is much whiter than flour. After adding flour to paper pulp, the ink will smear, and after adding lime, it will also smudge.

Not dizzy with ink.

do not know.

It seems that milk of lime is waterproof, and it seems that quicklime absorbs water.

I have no choice but to do another test.

Take some paper pulp, sprinkle a handful of lime into it, and stir vigorously for a period of time. Judging from the extremely low solubility of calcium hydroxide, when a handful of lime is sprinkled in, a few will turn into calcium hydroxide and dissolve into the pulp, while most of the lime powder will not.
To be continued...