After living on a desert island, they all plotted evil against me.

Bamboo as thick as the mouth of a bowl serves as the bottom layer, and two layers of branches and leaves are laid on top as the base.

People feel a tough and powerful feeling after walking up.

Maybe being isolated from the ground can actually have a refreshing effect.

Or maybe it's because the haystacks stacked in the rabbit house have a strong moisture absorption effect.

All in all, the feeling here is very refreshing.

The roof is very thick, and at first glance there is no light coming in at all.

Although it has not been verified by actual rain.

But Zhang Liu already believed in the roof's ability to keep out rain.

After walking out of the rabbit house, instead of resting, he now wanted to make soap with lard and plant ash as a birthday present for Xiang Lingying.

However, Zhang Liu also understood that lard was a scarce resource for everyone.

So before making it, he needed to discuss it with the girls.

But as a birthday gift and surprise.

Xiang Lingying cannot know.

And the way to keep it a secret from her is also very simple.

After all, the girls are now busy making mud bricks in Bamboo House No. [-].

"Sister Wanying, I have something to ask you."

Walk to the door of Bamboo House No. [-].

Zhang Liu stopped Xiang Wanying, who was carrying a bag of soil dug from the taro field and preparing to enter Bamboo House No. [-].

"Huh? What's the matter? Why don't you rest?"

Put the dirt in your hands at the door.

Xiang Wanying looked at her slender palms that were stained with soil.

She hid her dirty hands behind her back rather embarrassedly.

At this moment, Xiang Wanying wanted to wash her hands before talking to Zhang Liu.

But facing the urging look from the other party, she could only walk over and whisper: "Go and rest quickly. Qin Ruoyan and the others also said that you should be very tired."

"Forehead……"

I heard Qin Ruoyan and Qin Ruoshuang say that they were tired.

An embarrassed expression suddenly appeared on Zhang Liu's face.

But then he pulled Xiang Wanying to the side and whispered: "Well, today is Xiang Lingying's birthday..."

"Today? Birthday?"

There was a hint of confusion in Xiang Wanying's tone.

Then she heard Zhang Liu say the date.

February [-]th…

"I actually forgot..."

Eyelids drooped, tone low.

A deep guilty expression suddenly appeared on the face of the Xiang family's head maid.

As a maid, she really couldn't forgive herself for committing such an oversight.

Chapter 216 I don’t want a daughter whose mother is single

"As a birthday gift, I'm going to make a soap for Xiang Lingying." He saw Xiang Wanying's guilt in his eyes, but at this moment Zhang Liu wanted to explain his request: "Because lard is used, I need to go through Everyone agrees.”

After thinking for a while, he added: "In order to surprise, it must be kept secret in the early stage, and the soap may not be successful..."

"Understood!"

Xiang Wanying responded briefly, and then nodded to show that she understood.

After taking a few deep breaths.

She had successfully freed herself from her guilt.

At this moment, Xiang Wanying has returned to her identity as a neat and tidy maid.

Looking at the embarrassed Zhang Liu in front of her, she directly spoke out the other person's unspoken thoughts: "You want me to call the eldest lady away first, and then let you and others talk about lard and confidentiality. Bar?"

"Yeah!" Zhang Liu nodded vigorously.

Facing such an understanding Xiang Wanying, he felt a little relaxed.

Without saying anything else, Xiang Wanying adjusted her maid uniform first, and then she began to cooperate with Zhang Liu.

When Xiang Wanying called Xiang Lingying out.

Under everyone's confused gaze, Zhang Liu walked in with an embarrassed look on his face and told them about his idea of ​​trying to make soap using lard.

"Is it Mr. Xiang Lingying's birthday today?"

"Um...Zhang Liu, do you need my help?"

"I can help too!"

Everyone's reaction was very unanimous, and they started to enthusiastically want to help.

Looking at this scene, Zhang Liu felt relieved.

He shook his head with a smile and rejected everyone's suggestions for help, then turned around and walked into Bamboo House No. [-].

There are four bamboo tubes of lard on the bamboo table here.

It was brewed from two big wild boars last time.

At present, one of the bamboo tubes has been used two-thirds during this period.

After being on a desert island.

Girls no longer hate fat as much as before.

On the contrary, stir-fried vegetables with lard or meat with fat and roasted taro have become their favorite foods. They are delicious and filling!

Pick up the bamboo tube that has only one-third of the lard.

Zhang Liu knew how precious lard was, so he didn't intend to use it all up. He just poured half of it into the small clay pot he was holding.

Then Zhang Liu walked to his bamboo house No. [-] carrying the bowl of lard.

Standing there, he did not take action immediately, but began to think seriously.

The ancient art of making soap.

Zhang Liu didn't know anything about it.

So at this moment, he could only rely on the rough memories in his brain to think of the steps mentioned in the novel.

But after thinking about it for a long time, Zhang Liu didn't have a good idea.

Because he really didn’t have much of an impression...

Shame to say.

Compared with the soap making process, Zhang Liu can better remember the plot of the protagonist pretending to be a slap in the face after successfully making the soap, and then he was crazy about the heroine's favor.

After all, the former can be seen in one's own bathroom, but the latter is really refreshing.

While he was thinking hard about the soap making process in Bamboo House No. [-].

Zhao Yiran in Bamboo House No. [-] was also deep in thought.

Forced by her family to read a bunch of ancient books to improve her culture, she seemed to have seen relevant records in the book "Kaogong Ji".

It's just that no matter how Zhao Yiran frowns and thinks, she can't review it completely.

Thinking about it, I only remember that plant ash can be used to wash clothes, and it has nothing to do with soap.

Under Song Shuyao's worried gaze, Zhao Yiran could only sigh slightly and end his memories.

She then moved on to making clay bricks.

at the same time.

Zhang Liu, who had sorted out his general ideas, started his own production process.

If it is consistent with the principle, he can be considered to have some understanding.

After all, making soap from plant ash is an ester hydrolysis reaction catalyzed by alkali.

This reaction is also called saponification.

It can usually be understood as the hydrolysis of fats.

This basic principle is also used to wash clothes with plant ash soaked in water.

Since it is a base catalyzed reaction.

So in his mind, the stronger the alkalinity, the better!

Although the ash water from the vegetation burned my hands before, it was only to a slight extent.

There are only two ways to become more alkaline.

The first is to soak for long enough to completely soak out the "alkalinity" in the plant ash.

But this method is obviously not feasible at the moment. Xiang Lingying’s birthday is today.

Xiang Wanying's next birthday is May [-]th.

Then the second way is to concentrate...

There is still plenty of plant ash at the moment.

So Zhang Liu planned to soak the plant ash in water and extract the clear liquid on top to boil it.

Then the shells collected from the beach are calcined into quicklime.

Although quicklime is not directly alkaline, it is also a proper alkaline oxide.

It can be directly turned into calcium hydroxide when put into water.

If you mix the two together and then add lard for alkali catalysis, you should be able to "gradually solidify" like the time-travel novel said, right?

Think through the specific process.

Zhang Liu also started to operate.

First soak the plant ash water, then put it into a small alloy pot and start boiling.

Then he put down the tumbling alloy pot and ran to Bamboo House No. [-]. He took out a few relatively complete clam shells and placed them in the fire pit in the corridor for calcination.

The opening of Bamboo House No. [-] is facing this way.

Xiang Lingying, who had no idea that Zhang Liu was preparing a birthday gift for himself, was full of surprise.

But she was also held back by her head maid with other topics.

While the girls were making bricks, they were also chatting to relieve boredom.

The topic everyone was chatting about came to what to do after getting out of trouble.

"Well... I hope you can continue to be a teacher in school, right?" Zhou Fang pressed the bricks in her hands carefully, and then said with a bit of loneliness in her voice: "After all, there will be nothing to do in the future. made."

"Godmother, why don't you go back and I can find some good people for you to go on a blind date with?"

Xiang Wanying could also hear the loneliness in Zhou Fang's voice.

The most puzzling thing in her heart is that her godmother has always been single.

No matter from any angle, this is not normal...

This "noble girls' school" is a school specially allocated by the upper class in society.

Except for Zhang Liu, the first "test" student, everyone inside was of the same class...or in other words, they had resources with each other.

There may be some families that are prospering and have more resources, while some families are declining and have fewer resources.