"Look, how is this place?"

Standing in this large warehouse with a brick and wood structure, Song Qiyu pointed to the large warehouse and said.

"Zhiyuan, see if it's the same as you said, this big warehouse is ten zhang long and two zhang wide, and when you go out, you can go to the Qinhuai River, you can rely on the boat on the bank, and the goods can be directly loaded and transported to various places......"

Introducing the house in front of him, Song Qiyu finally smiled again.

"This was originally a grocery warehouse, and after Brother Zhiyuan said it yesterday, the younger brother asked people to buy it and use it to run the factory."

Factory......

Hearing these two words, Shi Yiwen nodded with a smile and did not speak.

Drinking and mishapting.

Until now, Shi Yiwen's heart is still a mixed bag, what is going on?

Originally, he wanted to hand over the formula to Song Qiyu and return his personal favor, but he never thought about it, but he was pulled by him to set up a toothpaste factory. And Song Qiyu is also very concerned about this. Immediately set about it, and then sent a coachman to pick him up in large quantities.

No, the factory site is far away.

"Zhiyuan, look, this big warehouse can be used to make toothpaste, and the two small warehouses can be used as a warehouse, what do you think of the little brother's arrangement?"

"That's very good."

Shi Yiwen, who was difficult to ride a tiger, smiled and nodded.

I'm afraid only God knows, it was just a casual remark at the beginning.

After visiting the factory, Song Qiyu warmly invited Shi Yiwen to dine at the restaurant by the Qinhuai River, sat in the restaurant, looked at the painting boat on the Qinhuai River, and the two chatted a lot.

In this regard, Shi Yiwen just smiled and nodded, but did not say anything. He even vaguely felt that Song Qiyu was interested in toothpaste. It's not so much because of profit, but because I want to repay the favor.

Shi Yiwen, who vaguely guessed Song Qiyu's thoughts, looked at his gaze, and there were some changes. After all, he originally only thought that the other party was interested in toothpaste, but he thought that he just wanted to repay the favor.

It is also said that the Song family has a big business, and ordinary small businesses must not be looked down upon.

It's all right......

chatting and chatting, naturally talked about the factory again, talked about the production of toothpaste, and when Song Qiyu asked about the raw materials, Shi Yiwen handed over the formula again.

Looking at the name on the formula, Song Qiyu was puzzled.

"Friction agent? What is it? ”

"Oh, blame me, this friction agent is ......"

Realizing that modern society has a different name for stone than in ancient times, Shi Yiwen explained.

"In fact, it is made of hydrated lime, which is precipitated by a special process, and finally dehydrated, dried and crushed."

Shi Yiwen didn't say anything about "carbon dioxide carbonized lime milk produces calcium carbonate", there are some things that cannot be explained clearly, so there is no need to explain them at all.

"So it's lime? This is not only a large quantity, but also a low price. ”

Song Qiyu nodded and asked.

"And what kind of oil is this glycerin?"

"Glycerol ......"

Song Qiyu's question made Shi Yiwen's brows frown slightly, and he said after a while.

"This glycerin is extracted from oil, and it is prepared by the saponification reaction of oil......"

Because his mother used to make handmade soap from the waste oil of the range hood, he was very familiar with the saponification reaction. Fat and sodium hydroxide are boiled together and hydrolyzed into sodium and glycerin, which are processed and molded into soap.

Talking about it, thinking of the occasional women by the river beating their clothes with wooden sticks in the past few days, Shi Yiwen's eyes lit up and smiled.

"Ziyu, speaking of glycerin, it reminds me of another thing, if you get it right, the market will be more than toothpaste."

Since you want to repay the favor, then I will give you a fortune.

"Oh? Please also make it clear. ”

Song Qiyu said with interest.

"Ziyu, look at the riverside ......"

Pointing out the window, on the bank of the Qinhuai River, I saw some women by the river beating their clothes with mallets.

Looking at Qin Huaihe, Song Qiyu was puzzled.

"What does Zhiyuan let the little brother see?"

"What do you think they do for laundry?"

"Mallet?"

Puzzled, Song Qiyu shook his head again and said.

In addition to picking some honey locusts themselves, merchants in this market also use honey locusts to make soap balls, sell them on the street, put the soap balls in the water, soak the clothes in the water, and then use the stick mallet showdown to wash the clothes."

Song Qiyu's explanation made Shi Yiwen smile.

"Honey locust laundry is not clean, so you have to beat it repeatedly, and if there is dirt such as oil, it is even more difficult to clean. I have a way of making things that wash clothes cleaner. Well, glycerin is exactly a by-product of making it, so it is not wasted when it is produced. ”

At this time, Shi Yiwen knew what the industrial chain was, toothpaste seemed simple, but if you wanted to produce it in the 16th century, it was not so simple. Originally, I just wanted to make toothpaste, but it turned out that I had to make soap first.

"Oh? What's that? ”

With a smile on his face, Shi Yiwen spit out two words.

"Soap!"

Compared with honey locusts, Shi Yiwen believes that the decontamination power of soap is definitely far superior to it, and if it is produced in large quantities, it will definitely be profitable, after all, even ordinary people need soap to wash their clothes.

"Soap?"

Song Qiyu asked with great interest,

"And how do you make this soap?"

"It's easy."

Laughing, Shi Yiwen got up directly and said.

"Let's make soap now."

Just do it, Shi Yiwen didn't even consider the issue of secrecy, and on the way home, he instructed the little guy next to Song Qiyu to buy ten catties of oil.

"Childe, what kind of oil do you buy?"

Xiao An looked at Shi Langzhong and asked.

"What oil?"

Slightly stunned, Shi Yiwen said directly.

"Soybean fat, lard, butter, anything."

Finally, he added.

"Buy whatever oil is cheap."

Surprisingly, contrary to his imagination, the cheapest oil was actually butter. In this regard, Shi Yiwen did not ask in detail.

Later, along the way, I bought alkaline noodles, quicklime and other raw materials. In a bustling city like Nanjing, it's easy to buy all of these things, alkaline noodles can be bought in ordinary grocery stores, and quicklime is bought in the stock mill where the house is built.

It didn't take much effort to buy all the ingredients needed.

When he returned home and counted the raw materials he bought, Shi Yiwen said to Song Qiyu.

"Brother Song, you sit down first, and I'll go over and make the soap first."

Song Qiyu, who only thought that Shi Yiwen was going to be kept secret, also took it for granted, so he smiled.

"The little brother is waiting here."

Then he sat alone in the hall smiling, and said to himself as he picked up his teacup and drank it.

"This is also how it should be, after all, it is someone's unique secret skill."