Seeing that even the dean had spoken, Shi Yichang finally believed that he was really smelly, hurriedly saluted Li Su, and then left in a hurry. Looking at the other party's back, Yuan Tiangang smiled and explained: "Your Highness is in a hurry, although this Shi Yi is sloppy, but in the way of alchemy and chemistry, he is extremely talented. ”

Yuan Tiangang was afraid that Li Yi would blame him, so he hurriedly explained Shi Yichang, but Li Yi laughed and said: "Yuan Daochang doesn't have to explain, Shi Yi Yi Chang concentrates on research, and forgets to take care of himself, which makes this king also feel extremely admired!" ”

Yuan Tiangang saw that Li Su's tone of speech was indeed sincere, so he relieved his heart and led Li Su into the teaching building at the moment. As soon as he entered, Li Su found that the smell was even more unpleasant, but it was still worse than the smell on the body of the stone chief.

This is obviously not an ordinary school building, and there are no teaching facilities such as lecterns, for example, in the classrooms on the first floor, there are piles of wool stored, although these wools seem to be similar, but if you look closely, you can see the difference in color and fiber thickness.

Went up the stairs to the second floor, but the scene here surprised Li Su, only to see that in the entire large classroom on the second floor, there was a large cement pool in the middle, and the pool was filled with a gray-white liquid, and the liquid emitted a pungent smell.

Around this large cement pool, there are more than a dozen small cement pools, next to each cement pool, there are some students dressed as people busy, some of them hold thick wooden sticks, constantly stirring in the cement pool, and some people pick out some wool on the ground, and then throw it into each cement pool, and at the same time record something in the notebook next to it.

Looking at the impact in front of them, Li Yu and the others didn't go in to disturb them, in fact, the main reason was that the second floor was too smelly, especially when those apprentices were stirring in the cement pool, the pungent smell was even more disgusting.

"Your Highness, now the textile mills are using cotton as raw material for spinning, but because of time constraints, the cotton output is insufficient, so we want to replace cotton with other materials, and after many screenings, we decided to replace it with wool with a very high yield on the grassland, but we want to use wool to spin, but we have to solve the first problem, that is, the cleaning of wool!" Yuan Tiangang pointed to the busy students inside and introduced.

"Cleaning, what's so hard about that?" Li Su was stunned after hearing this, he knew that wool weaving in later generations was very common, but in the era of the Tang Dynasty, wool could only be made into thick and heavy wool felt at most, and no one regarded wool as a textile material at all, but the key reason for this was that he had not come to ask.

"Your Royal Highness doesn't know, the reason why wool can't become a textile material like cotton, the most critical step is to clean, because the wool grows on the sheep, so it is contaminated with a lot of sediment, in addition to the sheep's sweat, grease and other things, especially the grease in it, a lot of sediment sticks to the wool, making the wool form a hard lump, if you don't want to remove the grease on the wool, there is no way to spin." Yuan Tiangang opened his mouth to explain.

"Oh, so that's the case, no wonder the Hu people on the grassland can only make heavy wool felt out of wool." Li Su said to himself after hearing this. In fact, the nomads on the steppe mainly used a large number of sheepskins to trade with the Central Plains, and things like wool were like garbage at all, except for a small amount that would be made into wool felt, everything else could only be discarded.

While he was talking, the Shi Yi Chang who had just gone to clean finally came back, but when Li Su saw this Shi Yi Chang again, he was immediately stunned, only to see that the cleaned Shi Yi was about thirty years old, his face was as white as jade, and the three long whiskers under his chin were fluttering, looking extremely chic, although the Taoist robe he was wearing was still very shabby, but at least it was much cleaner, and it did have a bit of a feeling of being a Taoist immortal from a distance, and the sloppy image before was simply a world of difference.

After Shi Yichang saluted Li Su again, he began to carefully explain the whole process of washing his hair to Li Su. In fact, Li Su doesn't care much about the process, after all, he doesn't know much about these things, what he values most is the result, whether the cleaned wool can meet the requirements of the textile, and what is the cost of this cleaning, and is there any commercial value? That's what he cares about the most.

However, although Li Su was not interested, he still pretended to be listening very seriously on the surface, although most of them did not understand, but the basic principle was understood, which was nothing more than in alkaline water, controlling the temperature and stirring speed, so that the oil on the wool was separated, and different varieties of wool have different treatment methods. However, these detailed processing processes made his mind a mess.

Finally endured the stench and listened to Shi explain the detailed process for a long time, and finally they came to the third floor, where the stench was much lighter. I saw Shi Yichang pointing to a row of shelves next to the wall and said, "Your Highness, please look, this is our experimental sample storage room, and we will keep the samples of each experiment here!" ”

Shi Yichang said, walked over and picked up a small glass bottle from the shelf, and there was a soft and yellowish wool in the bottle. And on the shelf behind the stone body, there are about a few hundred such bottles together.

And Li Yu and the others looked at the glass bottles one by one, and they were all very shocked in their hearts, they didn't expect a small hair washing process to let Shi Yi and others conduct hundreds of experiments, which sounded unbelievable, but fortunately, they finally succeeded.

At this time, I saw Shi Yichang walking to the end of the shelf, picking up the bottom bottle, and then walking to Li Su's side, pointing to the soft and white wool in the bottle and smiling: "Your Highness, please see, this is the wool sample we got in the final process, although it is not perfect, but it can be used as a textile material!" ”

Li Su also took the glass bottle a little excitedly, gently opened the lid to take out the wool inside, and then took out a trace and rubbed it on his hand, and found that the fiber of wool was thicker than cotton fiber, but there was no problem as a spinning material.

"Okay, the stone is long, wool is indeed an excellent textile material, but what about the cost of wool washing, if it is too expensive, I am afraid it will not be cost-effective!" Li Su praised it first, and then eagerly asked the question he was most concerned about.

"Your Royal Highness rest assured, the various materials used in this wool washing process are very ordinary, and the student union below is also optimizing the wool washing process, striving to use the least materials and wash out the most wool, so the cost is extremely low, but this cost does not include the price of the buyer of wool, after all, although the current wool is not valuable, but if it is purchased in large quantities, the grassland tribes rich in wool will definitely raise the price." Shi Yichang is worthy of being a talent, and he even thought of future commercial applications.

"Hehe, don't worry about this stone, this king will deal with it, you just need to get the whole hair washing process out." Li Su said excitedly, but then he thought of it again, and hurriedly asked, "By the way, have you already applied for a patent for this hair washing?" ”

"Your Highness, we have already applied!" Shi smiled and said, patent rights are a good thing, and they will all have to rely on patents to live in the future.

"Okay, now I'll give you two choices, the first is that I pay 200,000 yuan to buy out your patent at one time, and the other is that you keep the patent right, and the person we use the hair washing patent pays you the patent fee, which one do you choose?" Li Su said very arrogantly, even if 200,000 guan is placed now, it is not a small amount, and it is almost enough to build another Taoist college.

As soon as they heard that Li Su was willing to spend 200,000 yuan to buy this patent, Yuan Tiangang and Shi Yichang were all happy, or that sentence, their Taoist Academy was still in its infancy, although Li Su paid for the construction of the Taoist Academy, and there were maintenance costs for one year, but these expenses were only enough to maintain, and if the academy wanted to do something else, it would not be able to squeeze it out at all.

For example, Shi Yichang's research on cleaning wool, although the money required is not very much, but Yuan Tiangang is still difficult to come up with, so Shi Yichang almost tried his best, even sold his private property, and even the Taoist robe on his body was not worth changing, which shows how embarrassed he is.

"Your Highness, we will choose the first one and sell you the patent at one time!" Shi Yichang discussed with Yuan Tiangang for a while, and immediately made a decision, although they also knew that they could get greater profits by collecting royalties, but in this situation, they needed to use the money they laughed at for all aspects of research.

"Okay, happy, I'll order someone to send the check from Datang Bank in the afternoon, and you can exchange it at any time!" Li Su was also overjoyed, he had long known that Yuan Tiangang would choose to pay off in a lump sum first.

After acquiring the patent right of wool washing, Li Su then visited several projects that were being studied, such as the new nitrate method of sheepskin related to wool washing, and the use of lanolin collected after wool washing, etc., some of these projects have been successfully studied, Li Su also gave the corresponding purchase price according to the size of the business prospects, but the commercial prospects of these projects can not be compared with wool textiles, so the prices are not too high.

After visiting the College of Chemistry, Yuan Tiangang took Li Su to his residence in the college, in addition to him, there was also Li Chunfeng to accompany him, as for the Shi Yichang, he had already gone back to take the students to perfect the hair washing process.

However, after Li Sugang sat down and took a sip of tea, he suddenly turned to Li Chunfeng and said with a smile: "Brother Chunfeng, Daoist Yuan has finished visiting the Chemistry College, is it time to take out the new things you have researched and take a look?" (To be continued)

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