Subsequently, Li Tianyang was in the laboratory and watched the process of Chengcai personally operating the tools and making a piece of finished soap up close.

While making, Cheng Cai explained the whole process to Li Tianyang on the side: "The cooking oil we use now is lard boiled with fatty pork, so it needs to be heated before it can be used, mixed with the mixture we made with plant ash and water, and then stirred evenly. ”

It seems to be just a few words, but the actual operation can take a lot of energy and strength, just a stirring, you need to become a talent while heating and stirring, but also to ensure that the lard of the text can not be too high, so this stirring action alone is enough to take nearly half an hour to complete.

Even after that, the whole process of making soap was not completed, and when a large number of bubbles filled the entire mixing liquid, Chengcai stopped his stirring action. After preventing the boiling hot mixed liquid from aside, Cheng Cai raised his head and said to Li Tianyang: "Next, we need to wait for two days, until this batch of mixed liquid has completely precipitated, we can continue the next action, separate these gray-white viscous substances suspended on it, and air dry it for about a month, and then we can get such a piece of soap in our hands."

When Cheng Cai's mouth said all kinds of new terms that he learned from Li Tianyang's elementary chemistry books, his whole person was full of energy, full of confidence and excitement, not at all like a fifteen-year-old kid. Seeing Chengcai like no one else, Li Tianyang was not only happy for him in his heart, but also glad that there was such a high-tech talent in the camp.

You must know that although Chengcai is just a teenager, don't forget that his grandfather Chen Yiming is not an ordinary person, he is the patriarch of their Chen family, which also means that Chengcai will become the patriarch of their Chen family when he grows up. It is also appropriate for the eldest grandson of the long house to inherit the position of the patriarch, after all, the number of people in their Chen family who survived and lived in Tanmen was very small, most of them were collateral children, and he was the only one left.

To be able to bring him, a very important figure to the Chen family, to Bengang, Li Tianyang spent a lot of energy and eloquence to persuade Yumo, the eldest sister. Only by convincing her can Chengcai come from the safe Tan Gate to this place that is considered a wild place by everyone. Of course, for Chengcai, following Li Tianyang to mess around, that is the life he wants to live, only Li Tianyang will understand Chengcai's ideas that are child's play and even deviant in the eyes of others, and will try his best to meet Chengcai's various strange needs.

"Can you make this soap a little purer and make it look less ugly?" Li Tianyang looked at this strange soap according to the eyes of later generations, of course he felt that this thing had many shortcomings, otherwise he wouldn't have seen what it was at all.

"Brother-in-law, there is grass and wood ash in this raw material, no matter how it changes, the color can only be like this, otherwise Shen Kuo would not have named it soap!" It seems that Chengcai has not thought of other methods, but he has not thought of a solution until now.

"Think of a way, I'm sure you'll be able to do it, ha!!" Li Tianyang is not a problem for Chengcai, after all, whether it is soap or soap in later generations, which one does not look very beautiful, which is like now, there is no appearance at all: "Moreover, since this soap is used to wash hands and face, can you add a little spice or something to it, so that when it is cleaned, it can also make people's faces smell good?" ”

This idea, Li Tianyang is full of plagiarism of the soap of later generations, and he does not blush at all, so he told Chengcai so openly and honestly to give advice for his research results.

"Why do you put spices?" Cheng Cai is puzzled.

"Stupid, like us old men, who cares about their appearance, isn't it just a flush of water at the water's edge and a wipe on their clothes when they are dirty? Your product is aimed at those who have money and those female dependents, so the appearance and content are the key to selling. Li Tianyang slapped Chengcai on the shoulder again, and then smiled obscenely at Chengcai: "Don't you want to think about your sister, how many times you have to wash your hands all day and night, and even have to change your clothes twice, a woman like her, do you think it's your sister's case?" ”

"Oh oh oh!" Chengcai suddenly nodded his head.

"I've got you the idea, it's up to you whether you can develop it or not!" Li Tianyang gave Chengcai an encouraging look, then turned his head to look at Yang Zhi, who had not made a sound, and asked expectantly: "It hasn't been long since Chengcai came and there have been results, I believe you will also give me a surprise." ”

When he was introducing his results, Yang Zhi was noncommittal, and he was convinced that Yang Zhi must have an achievement in his hands, but what he couldn't understand was why Yang Zhi didn't tell Li Tianyang about this achievement, but stayed in the laboratory.

"In fact, this product was not created by us, but used by ethnic minorities in Guangzhou, Yunnan and Guizhou. Yang Zhi was a little embarrassed to answer Li Tianyang's question, and then took out the pottery that had been prepared long ago from behind him and handed it to Li Tianyang's hand.

"Hmph, no creativity at all!!" Chengcai seems to be obsessed with the appearance of the product.

"What is this?" Li Tianyang opened the wooden cork on the top of the pottery, and a smell of grass and trees came to his face at the tip of his nose.

"This is a soaphorn liquid made from the soaphorn tree that grows widely in the southwest, washed and cut into sections, and boiled in a pot. Yang Zhi took the pottery from Li Tianyang's hand, poured out a little soaphorn liquid in it and put it on his hand, the amber liquid flowed in the palm of his hand, and then casually smeared it on the back of his somewhat dirty palm, which had the same effect as soap.

(End of chapter)