When Li Yi made soap, salt, glycerin and other layers were separated during the saponification reaction.

There is a liquid for unsaturated saponification reaction inside. The salt and glycerin are extracted separately, and the rest is soapy water.

These soapy waters are generally used to participate in the next saponification reaction. If you want to purify, some soap can still be produced, but the input is not proportional to the output.

Now it's just right to sell it. Li Yi of the Tang Dynasty didn't care about it, and Chang'an County was still fine.

Not all of them use soapy water, and soap powder, and the poor people use wood ash to scrub.

That is, people in the Tang Dynasty do not take a bath for a long time, especially in winter, only officials have a day to rest.

If you want to talk about who always takes a bath, it is not uncommon for girls in Pingkangfang to take a bath eight times a day in Beiqu.

In addition, there are farmers who work hard and special workshops in the village. They have cut their hair, short hair, and even men's hair.

Wash hard when you arrive at the bath, which is convenient and comfortable.

If Li Yi hadn't been to take care of his face, he would have wished he could shave a bald head. It would be convenient for the bald head to perform surgery. Wash, wash, put on a surgical cap, and don't worry about something falling into the patient's wound.

"It's hard to find oil, especially pancreatic seeds. Others have used it to wash things with wood ash." Li Chengqi knew that Li Yi had used a lot of fat meat before.

"I use soybean oil now." Li Yi whispered, who stipulated that the saponification reaction must be animal fat?

"Soybean oil is also possible?" Li Chengqi was surprised. He had never learned to use soybean oil to make soap since he was a child. How many magical things are there?

Oil and soap, aren't the difference between the two things?

"It's like making soy milk into tofu." Li Yi understood the elder brother's thoughts and explained it with the simplest example.

"Yes, soy milk can be made into tofu, and dried tofu can also be made into soybeans, brine or vinegar in soybean oil?" Li Chengqi began to imagine.

"If you add vinegar, cooked oil can be used to mix vegetables." Li Yi joked.

After saying that, Li Yi asked the child who was walking over with his stomach: "Where are you feeling uncomfortable?"

"Belly, belly." said the child.

"Is there a bug? Brother Yi, give him that candy." Li Chengqi felt that he could be a doctor too.

Li Yi asked Qingsong to put the box flat, the child put it on, and began to press it.

"Does it hurt here?" Li Yi asked.

"It hurts a little when you press it, but if you don't press it, it won't hurt." The child replied.

"Why does it hurt? Is it like a needle?" Li Yi asked again.

"It just hurts when pressing, it hurts anywhere."

"Where is here?"

"It doesn't hurt, it won't work. I'm going to spit it out." The child said and struggled, wow! spit out.

"Can you vomit again?" Li Yi looked at the 'water' that was vomiting out.

"I can't spit it out anymore," the child replied.

"Give him two skewers to eat, you're hungry." Li Yi ordered.

I asked the child again: "Didn't have dinner last night?"

"How do you know?" The child said I was surprised.

"Not only did you not eat, you didn't drink a few sips of water. When you woke up in the morning, you went straight to Zhuangzi and drank a few sips of soup. Your body needs a lot and you have a lot of exercise in your skate.

The metabolism is too fast, and water quickly enters the kidneys and enters the bladder.

The remaining little meat foam will give you feedback from the stomach, and the secretion of gastric acid will increase, and the spitting will bring you foam.

It's still a bit bitter, right? The gallbladder is involved in secretion, and there is bile inside. Gastric acid stimulates the gastric mucosa. Of course, your stomach hurts."

Li Yi gave a scientific explanation: What kind of insects? They are hungry.

The housekeeper next to him gave a few skewers and the children ate them beautifully.

"Does it still hurt?" Li Yi asked again at this time.

"It hurts no more, it's hot." The child is honest.

Li Chengqi was stunned by the side. He didn't feel any problems with his stomach when he was hungry. He was shocked by Li Yi's diagnosis.

Once you press and the child spits, he will know that he is hungry. He can even tell that he didn’t eat last night?

"Who else comes to eat when you are hungry? Eat less. If you have lunch, can my Lijiazhuang even give the children a bite?"

Li Yi shouted at the other children.

Sure enough, many children are back and want to eat.

"Is it because I don't eat?" Li Chengqi wanted to learn, but the miracle doctor didn't think it was just now.

"It's drinking soup. If you don't drink soup, it's okay. If there is oil and water in the soup, the stomach will naturally have to absorb the reaction. Otherwise, it's too hungry, the stomach will find it empty, which will slow down the secretion of stomach acid, and you won't feel hungry."

Li Yi explained the reason that hunger is feedback from gastric acid stimulating the gastric mucosa.

I feel that I am not hungry for a while because the water dilutes stomach acid.

Li Chengqi: "..."

He felt that he was not suitable for studying medicine, at least not suitable for studying medicine with Yidi. It was too difficult, what a mess?

"What about now?" he asked.

"Now eat a few skewers to neutralize stomach acid, and then secrete more stomach acid. By noon, you can eat a lot of food, which is unlike ordinary adults."

Li Yi said that, and also went to scoop a spoonful of soup and drank it, and it was cold outside.

"Yes, half a boy, I'm poor." Li Chengqi said a common saying.

"Master Li Dong, do we need money for food?" A man from a wealthy family came over and said to Li Yi.

"Are you embarrassed?" Li Chengqi retorted.

After saying this, Li Chengqi hurriedly left. The game over there should be over, right? It's time for the next game and then have a meal.

Li Yi also did not answer such boring questions, and continued to look at the child's physical condition.

When you watch it, it is a learning process, and sometimes you can take your pulse and compare it.

During lunch, the children of the wealthy family went to Zhangjia Village. The children who came by themselves were arranged to the corner of the cafeteria, each with a bowl of wooden bearded meat rice bowl and shredded radish soup.

The children laughed, and they thought it would be nice to have only one bowl of noodles.

As a result, there were meat, eggs, and even fungus, cucumber slices, and shredded radish soup were also delicious.

So they decided to come tomorrow and call other friends.

"Owner, they will come tomorrow." Zi Yu said things that suited human nature.

"Tomorrow I will give them the cooked meat, make it with garlic sprouts, and don't add chili peppers. I don't have chili peppers for others to eat."

Li Yi agreed with Zi Yu's words and said tomorrow's dietary arrangements.

"Owner, I mean they are greedy." Zi Yu treated herself as a member of Zhuangzi and gave her something to others for nothing.

"I didn't dare to give fat meat today because I was afraid that they would not eat oil for a long time and the gastrointestinal tract would be unfit for the gastrointestinal tract. The wood-wist meat was just right to adjust. I would eat fat and thin meat tomorrow, and the garlic sprouts stimulate the gastrointestinal tract. I would eat braised pork rice bowl the day after tomorrow."

Li Yi seemed to have not understood or heard what Zi Yu said, and continued to say his own.

"I'm done with the boss, I'll take over Taohong to take care of the baby." Cui Liu put down her chopsticks and said, "Go out."

"I've eaten too." Jin Yan pulled the last bite of the meal into his mouth, and said in a vague voice, not swallowing it yet.

"I'll tell them later." Qingsong took the initiative to take on the heavy responsibility and told the four men about Zhuangzi's situation.

"Selling newspapers requires manpower. If you don't have any care, how can you go to various places to deliver newspapers?" Li Yi said something that the four new people didn't understand.

His movable type has been made, copper movable type.

Lead movable type is difficult to take care of in winter and is prone to poisoning, so I didn’t touch it. When the weather is warm and there are more protective measures, I will change it.
Chapter completed!