"Purr ......"

"Poof!"

After raising his head and letting the warm water snort in his throat a few times, Li Yuanjia spat on the ground, and then carefully experienced the feeling between his teeth, and couldn't help frowning.

It's really awkward.

This new toothbrush is very uncomfortable to use, the hair is too hard, and the gums that can be brushed accidentally are painful, and even the gums bleed. However, Li Yuanjia hates the so-called "morning chewing tooth wood" even more, so the only way to let Chunyan and them change the material and continue to make new toothbrushes.

And in contrast, he thinks it's more important to invent toothpaste as soon as possible.

It's a pity that Li Yuanjia is really unfamiliar with the toothpaste, and he can't remember what is in it when he thinks about it, so he can only let Chunyan and them try the same, if they are lucky, they may be able to find out one or two active ingredients......

Just when Li Yuanjia kept licking his teeth and gums with his tongue, trying to expel the discomfort with this method, Chunyan, who was waiting next to him, said, "King, do you want to try the soap we just made yesterday?" ”

Turning his head to look at the closest girl, Li Yuanjia smiled with some surprise: "Huh? You've made a new soap? Okay, bring it to me and try it. ”

Soap, in fact, Han Wangfu has already made it, after all, Li Yuanjia at least knows what soap means, and he has seen so many crossings, so he naturally knows that soap is made of grease and alkali. It's just that he doesn't know exactly which raw materials work best and what the production process is.

But it's still the same sentence, our King Han has people!

Anyway, after thinking about it, the way to make soap is nothing more than dissolving, filtering, boiling, etc., there are so many careful girls in the house, Li Yuanjia only needs to give a rough plan and let Chunyan take a few people to do it slowly.

It's easy to make a soap that works.

It's just that it's a bit difficult to make a "clean" soap and add fragrance to it to make it a soap. Chunyan usually has to serve Li Yuanjia, so he can only hand over the work to a few little girls to do in their spare time, and sometimes it takes a month or two to make a better piece......

Anyway, when he took the newly made soap from Chunyan's hand, Li Yuanjia had no surprise on his face.

Compared to the last one, there are indeed improvements, the appearance is much less impurities, showing a slightly dark pale yellow, and the smell of soap is also much better, it seems to be mixed with the smell of several flowers. However, in the opinion of Li Yuanjia, who has seen a variety of industrialized products, the impurities looming in the pale yellow are enough to dispel all his desire to use.

Quietly washed his hands with soap, and Li Yuanjia returned the spring cigarette casually.

"King, how is this soap?"

"Well, it's a little better than last time."

In the anticipation of Chunyan's face, Li Yuanjia wiped his hands and said with a slight smile: "But there are still more impurities in it, and you don't filter it very cleanly...... By the way, don't always think about using silk or cloth, you can ask Han Lucheng for some paper and try it with them! ”

After listening to Li Yuanjia's words, Chunyan was suddenly shocked: "Huh? With paper? That...... Isn't that a waste? ”

Silk and cloth are used to filter plant ashes and other things, and they can be used later, but if you use paper, they are completely wasted. And for maids like Chunyan, not to mention how much a blank piece of paper is worth, they have a natural awe for books, papers and other items...... Or respect, it's psychologically hard to accept things that waste paper.

But Li Yuanjia didn't have this concern, and waved his hand directly: "There are so many papers at home, it's okay to use some...... By the way, you go, Han Lucheng called, I have something to do in the glass workshop! ”

As he spoke, Li Yuanjia suddenly remembered the glassware he was familiar with in his previous life.

Since it is a chemical experiment, glassware is naturally the best container. On the one hand, of course, because they are resistant to high temperatures and corrosion, and on the other hand, the processes and results of various reactions can be directly observed, which is extremely important for chemists and can be said to be one of the important foundations for the development of chemistry!

Some people say that Western chemistry was developed because they invented glass and could see what was going on inside; And the Orientals, who invented porcelain, have never really started in chemistry because they can't see it......

True or not, the glass has already been made anyway, so why not try it?

After washing up, Li Yuanjia and Fang Fengzhu had a hearty breakfast together, and then went to their study. After sitting down at his big desk, Li Yuanjia was ready to take a good look at the industries under his name - I don't know if it was because of the accumulation, all kinds of good things have happened frequently recently, which made him a little careless.

Take a good look at it, and make a good plan.

But before Li Yuanjia could start, Princess Fang Fengzhu cautiously knocked on the door and asked with a smile: "King, do you have time here?" ”

"Hehe, of course there is!"

Putting down the willow charcoal pen he had just picked up in his hand, Li Yuanjia chuckled and said, "Come on, sit down next to me and talk...... What's wrong, what's the matter? ”

"Hmm."

Sitting down beside Li Yuanjia obediently, Fang Fengzhu nodded and said with a smile: "It's the abacus that the king made people do a few days ago, haven't I always had time to learn?" I finally have some free time today, so I want to ask the king for advice. ”

While speaking, Fang Fengzhu blinked her big eyes, which were extremely cute.

Even if he gets along with her day and night, Li Yuanjia couldn't help but feel a wave in his heart when he saw this situation, and reached out to hold Fang Fengzhu's little hand: "Fengzhu wants to learn, just come to me at any time...... By the way, I've been writing about the use of abacus recently, and it is estimated that there will be another ten days and eight days, and you can also read the book to learn when the time comes. ”

Abacus, Li Yuanjia will definitely promote.

However, he will never teach people himself, so the only way to do this is to write a book. Fortunately, he doesn't plan to teach how difficult it is, just the easiest way to use it.

However, after looking at Fang Fengzhu, he suddenly asked again: "By the way, Fengzhu, have you finished studying the six books of "Mathematics"?" ”

"Hee-hee, of course I'm done."

With a small face, Fang Fengzhu said proudly: "Although it is not as talented as King Wei, I have already finished these six books......"

"Gotcha! Get! ”

Just when Princess Han was excited to show what she had learned, a voice suddenly came from outside the door: "Wang, Huang Ren, they sent ...... from last month's report."