With Zhou Han's participation, Yunxi's first trip into the mountains was finally decided, and just five days later, the reason why he didn't leave immediately was to wait for mosquito repellent essential oil.

It turned out that although Ye Yuan took the two sisters to buy the distillation equipment excitedly, he ignored one thing, that is, the raw material mint, although mint is common, almost every farmer has planted it, but it is only used as a seasoning, and the planting is only a three-five bush, where is enough to steam essential oil.

So during this time, Ye Yuan entrusted Wang Dameng to collect this everywhere, and now it is also a small scale, you can try it, so you can persuade Zhou Han to wait a few more days, otherwise with Mr. Zhou's fanatical energy for pot play, I am afraid that he will not wait for a day.

In addition to mint, Yunxi has not forgotten another mosquito repellent grass, that is, wormwood. Wormwood is not only useful, but also everywhere, wild rivers, ravines and slopes, mobilize a few people to go out to pick casually, and carry back hundreds of catties, piled up there to look quite considerable.

Although there are many methods for the extraction of essential oils in later generations, such as freezing compression, chemical solvent extraction, carbon dioxide extraction, etc., these have little to do with Yunxi, and she only knows the most primitive method, that is, steam distillation.

If you want to steam out essential oil, the first step is to cut the raw materials short and chop, just like boiling Chinese medicine, if you want to get a good medicinal effect, you must crush the herbs to the finer, and the essential oil also needs to be finer and better.

But the ideal is very plump, the reality is very skinny, because the dosage is too large, Yunxi thinks about it, with the current industrial conditions, it is not realistic to find a few people to deal with it carefully like Chinese herbal medicines, not to mention whether the artificial is expensive or not, these materials are not easy to cut, don't cut too finely to make the juice run out, and then take it to steam the essential oil It will be worth the loss.

In the end, I had to listen to Ye Yuan's opinion and use the domineering artifact - the guillotine. The nearly one-meter-long knife is mounted on a longer wooden bottom groove, with a bolt rod fixed at one end and a handle at the other end that can be held up and down with both hands. The guillotine, which was used to cut hay for cattle in winter, had been useless for a while, but it was well preserved, and the blade was coated with thick lard and glowed with a dark glow. Because he didn't know if the oiliness would have an effect on the material, Ye Xin took a fine cloth and wiped it carefully.

Bao Zhengquan and Chen Shimei should use such a guillotine, right? It's scary to watch. Yunxi was curious, went up and touched it, and took a wormwood to try it, it was quite sharp, but this is cutting grass, I don't know if the neck is sharp enough?

She also tried it, but the knife was very heavy, and it was very difficult to use, and she couldn't fall straight into the middle of the wooden trough. But it's a small thing for someone who does it a lot. The hay was all in order, and the grass was naturally faster, and it didn't take long for it to be finely cut into a pile and packed into a big pot in a ratio of five to one for the material. Then the seal is soaked for two hours, and then the distillation begins.

Fortunately, although the method is a bit primitive, but wormwood and peppermint are not as expensive as roses, only their flowers are taken, both of which can be used on branches and leaves, and the price is negligible, so after a few days of hard work, they still got a sufficient amount of essential oil.

There is little mint material, only a few taels or less, but wormwood gets more than five catties. In ancient times, one catty was sixteen taels, and it was converted to more than eight catties in later generations. But think about the used wormwood, there are almost 2,000 catties, and you should be able to get about 20 catties of essential oil according to the technology of later generations, but here it is less than half the weight, and the utilization rate is too low.

However, this is the first time, after more tests, the ratio of material and water, soaking time, distillation time, as well as the degree of crushing of materials, the proficiency of personnel, etc., there is room for improvement, I believe that with the increase of the number of tests, the extraction rate will be higher and higher.

However, it is worth celebrating if they can refine successfully, after all, their original intention is not to make money, but just to make life more convenient and comfortable, so regardless of the extraction rate, it is very good to be able to use it.

Because Lin and Yunjin are very afraid of mosquitoes, they just got a bottle here, and Yunxi made the decision to let Yuanyuan send it to them, which made Zhou Han shout, "Do you know how to respect teachers and respect the elderly, why don't you use it for me first when I'm so old, is it appropriate to use it for others?" ”

"Sir, don't worry, won't this come out again soon. Although we should respect our teachers, you should also love our students, teachers, right? Didn't you also see the big red envelope on my eldest sister's hand? It's bitten by mosquitoes, and there are still on the arms and legs, which is very pitiful! So let's carry forward the style and let her go. ”

Zhou Han thought about it, as if Yun Jin had such a big red envelope in his hand, so he was embarrassed to say it again.

When Yunxi finally finished a paragraph, he returned to the main courtyard in a hot and dizzy state, and smelled the strong fragrance of wormwood for the first time, and his spirit was suddenly lifted, this thing is really good, very refreshing!

Yunxi went back to the house in a good mood, but unexpectedly found that Lin and Yun Jin were sitting in her room with Congcong in their arms.

"Mother, eldest sister, why did you come to my house, what is there to find me?" Yunxi asked puzzledly, even if you have something to do with her, there is no need to wait in her room directly, find someone to shout and she will go over. "How effective is the essential oil, mosquito repellent, right?" You don't have to think about it, it should be easy to use, you can repel mosquitoes by burning wormwood directly, not to mention essential oils, which is the essence of the essence!

I didn't want Yun Jin to roll his eyes directly, and replied angrily: "It's good to repel mosquitoes, don't you see that you have driven ourselves out?" ”

Belch......

It turned out that he didn't have something to do with her, but came to her house to hide?

I really forgot about this stubble, Yunxi patted his head. "Mother, eldest sister, I'm sorry, I forgot to tell you, this concentration is too high to be used directly, it's best to dilute it with water, or just drop a few drops on the tent."

"It's up to you now, what did you do earlier?" Yun Jin said strangely, "I still use such a big bottle, I heard that the fragrance used by the nobles in the palace is a thumb-sized bottle, you can pour it, get a wine bottle, I thought it would be a lot better!" ”

Yunxi: "So you use a lot?" ”

"Yes, sprinkle a little here, sprinkle a little there, and use it too much unconsciously." Yunjin Road.

"I didn't think it smelled much, and the refreshing taste was much better than direct smoking. But I started to choke my nose and then ...... Then I couldn't stay any longer, I couldn't even stay in the living room, I couldn't help it, my mother and I had to take Cong Cong to your house to sit. ”

Yunxi shook his head helplessly, his temperament was too anxious, and his hands and feet were too quick. Can't you wait for others to volatilize and then sprinkle it? When the smell is not strong, I sprinkle it vigorously, but when I smell it, it is too late. The speed of essential oil volatilization is fast enough, and it can't be like this for any random person, no wonder she smelled it at the gate.