Da Song a knife

Chapter 40

Zhang Sijiu raised his hands to dry, looked at the plant ash he had packed in a bamboo tube, and explained: "Plant ash. Plant ash can wash away oil stains."

Yang Yuanding was shocked: "This is also okay?"

Then he looked at Zhang Sijiu with admiration: "You're so smart, you know it all!"

Zhang Sijiu was silent for a moment, and told him: "I didn't think of it. It's just that poor people use this to wash their hands and clothes."

Although she knows the principle, this is indeed a native method, not what she thought of.

Yang Yuanding finally sighed sincerely: "The working people are really smart."

Without waiting for Zhang Sijiu to nod his head in agreement, he sighed again: "I use bath beans, but I don't think it's easy to use. I didn't expect that your family can't even afford bath beans."

He glanced at Zhang Sijiu with some guilt, and always felt that he was sorry for her: we all came here together, and I don't know the blessings in such a blessing, and she suffers so much, it makes people feel very guilty!
So Yang Yuanding said solemnly: "Don't worry, I will treat you better in the future."

He said: I want to take care of this fellow countryman as much as possible from all aspects!

Zhang Sijiu didn't quite understand Yang Yuanding's brain circuit, and finally replied politely with two words: "Thank you?"

The next moment, Yang Yuanding lowered his voice: "However, why don't we try to make soap? Do you know how? I probably know some principles. The chemistry teacher taught it in class before."

Zhang Sijiu reminded him: "The cost is very expensive, and animal oil or vegetable oil must be used."

And in this day and age, oil is very expensive.

"Don't worry about it, my family can have it. I'll study it later and send it to you when it's ready." Yang Yuanding was already eager to try: "If it's really made, we can try to sell it for money!"

"The cost is too high, and it's not easy to sell in a small county." Zhang Sijiu analyzed the problem realistically: "You can only sell to rich people."

Soap, in this day and age, is probably a luxury item.

Yang Yuanding nodded: "I bought the materials later and came to you, and then we will try to see if we can make it."

Zhang Sijiu didn't refuse: Who wouldn't want to use soap?

Another thought came to her: "If you want to make something scented, you have to add fragrances. However, I recommend making sulfur soap first."

Yang Yuanding was taken aback: "Sulphur? Why?"

"Sulfur soap has a better bactericidal effect than ordinary soap." Zhang Sijiu gave the reason.

Yang Yuanding looked at Zhang Sijiu's serious look, and screamed in his heart: You also said that you have no cleanliness! ! !
Regarding the matter of soap, Yang Yuanding and Zhang Sijiu brainstormed together in the end. When the sun was the most poisonous in the afternoon, they picked up the knowledge of chemistry together and pieced it together. They barely came up with the steps of making soap and the materials needed. .

Among them, grease is the most necessary and the most used.

In the end, the two had differences of opinion on the use of lard and suet.

Yang Yuanding was rich and powerful, so he thought he could do it in one step and use sheep oil.The term "mutton fat jade" was also brought up.

Zhang Sijiu mercilessly poured cold water on it: "Saponified suet, I'm afraid it has nothing to do with this word."

"Then lard." Yang Yuanding is a good talker: "You are right, lard is cheaper, and the cost of trial and error is low."

So the two finally reached a unity.

As for the laboratory—Yang Yuanding said that he was very strict at home, and it might be a little difficult to conduct experiments at home.

In the end, Zhang Sijiu simply chose the edge of a large weir behind the bamboo forest not far away.There is a slope of rocks and soil piled up when the wasteland was opened up, and there are many big stones. At that time, a stove can be directly used to refine oil and make soap on the spot.And it is close to the water, so it is convenient to put out the fire.

Yang Yuanding was simply arrogant about this kind of thing: "We will definitely become the richest people in the Song Dynasty in the future!"

Zhang Sijiu: Forget it, don't hit him.It's also good to be happy.

In a blink of an eye, the sun sank to the west.Yang Yuanding's family also came to pick him up.

He bid farewell to everyone happily, and said he would come back in a few days before leaving reluctantly.

Only Mrs. Xu felt very sorry—the mutton at noon tasted very ordinary, and it was a bit of a waste of that meat.Moreover, Yang Yuanding didn't eat much meat, and only ate rice with cold eggplant and loofah soup.

Zhang Sijiu saw Xu's thoughts, so he comforted her: "It's not that he thinks the meat is not tasty, but he wants us to eat more. After all, he probably also eats meat when he comes home."

Xu was stunned for a moment before sighing: "The children of the county magistrate's family are different, how old are they? They seem to be very playful, but they can talk and be careful. What they do makes people feel very warm!"

Zhang Sijiu smiled slightly: "He has a very good personality."

Such a person, it's hard not to like him.

Unfortunately, he refused to accept the surgery in return.Forget it, let's see if there is another opportunity later.

It was night, Zhang Sijiu played with the scalpel through the cloth strip, and felt regretful again in his heart: In fact, the only person who can accept this operation is probably Yang Yuanding.After all, he is the only one who is from modern times and has the acceptance for this kind of thing.If you are a contemporary person, if you mention it yourself, you will probably be beaten up.

She sighed softly: It's a pity, it seems that the skills I practiced at the beginning can no longer be used.It's really sad.

However, with this scalpel, Zhang Sijiu began to practice the basic skills of surgery - a person performing an operation must be proficient in using surgical instruments.How proficient is it?Probably, it is no longer a knife, but an extension of my body, and I can manipulate it as I like, and make any fine movements I want.

In addition, Zhang Sijiu also made his own suture needles—that is, they were bent red with a sewing needle.

With the scalpel, needle and thread, Zhang Sijiu can start to practice all kinds of suturing and cutting basic skills.

Including but not limited to caesarean section on beans, laparotomy on cucumbers, peeling and suturing egg skins...

The reason why he takes time to practice behind his back for a while every day is that Zhang Sijiu is afraid that after a long time, he will gradually become unfamiliar with his own skills.

This kind of thing is never going backwards.

And now this body is only eight years old.If she starts practicing early, maybe she will be able to be more stable and accurate in the future.

But just practicing like this will more or less make Zhang Sijiu feel a little bit anxious, and from time to time, he will feel a little eager: I don't know when I will be able to perform my first operation in this era?
However, this was originally just a small expectation of Zhang Sijiu.But she didn't expect that this day would come so quickly.

And it came out a little unprepared.

This is an ordinary morning.

The only unusual thing was that Yang Yuanding ran over happily again.

(End of this chapter)