Soap, perfume.

That's it.

First of all, soap, although the process of making soap is not so easy, but it is not as difficult as imagined, and the most quintessential part of it is naturally the saponification reaction that Lin Yi learned in chemistry class in his previous life.

The so-called saponification reaction, in layman's terms, is the reaction between alkalis and esters. Through this reaction, sodium and glycerol can be obtained, and sodium fatty acids are the main ingredients of soap.

Speaking of perfume, the process of making perfume is not as difficult as making soap, and the materials required are some various varieties of petals, which are added with alcohol, because alcohol can dissolve the aromatic oil in the petals, and alcohol is also volatile, once the perfume is made, it can release the fragrance faster.

Lin Yi has always been a man of action. Once an idea comes out, it will choose to implement it immediately.

His first thought was to make his own soap.

So, he immediately found the guys in the chamber of commerce, and asked them to help him find the lard used by the secular people to cook as soon as possible, and then find lime, the raw material for the saponification reaction, and finally, he sent someone to find some salt (that is, sodium chloride) for salting out, and separated the sodium of high-grade fatty acids generated after the reaction.

In the end, Lin Yi sent someone to find a cauldron for himself, and after finding many wooden barrels, with these things, Lin Yi plunged into his small courtyard, and it took three days to tie it.

This made Concubine Ya and the others really curious, and they all guessed what Lin Yi was going to do, but every time they asked Lin Yi, Lin Yi smiled mysteriously, and then told them that he was making this great invention, and once he invented this thing, it would inevitably become popular in the Southern Chu Immortal Realm and the world.

Faced with Lin Yi being so mysterious, everyone had to wait patiently, waiting for Lin Yi to invent his so-called great invention.

Three days later.

In the courtyard, Lin Yi looked at the yellowed thing in his hand at this moment, and an uncontrollable look of joy began to appear in his eyes.

There is nothing wrong with that. At this moment, Lin Yi's hand is the first piece of soap he made when he came to this world.

In these three days, Lin Yi almost in addition to normal cultivation, he has devoted himself to this, and Lin Yi is a layman, just relying on a chemical principle to make soap, and those processes are all dependent on his own exploration, so the degree of difficulty can be imagined.

In the past three days, Lin Yi has failed many times and wasted an unknown amount of time, but in the end, he finally succeeded in making the first bar of soap in this world!

Looking at the piece of soap in his hand, Lin Yi had joy on his face, but he also had a little regret, why? Because one of the raw materials of this soap is the lard, and the lard already has a strong fishy smell, so the soap in Lin Yi's hand will naturally inevitably be stained with a fishy smell, and with this smell, even if Lin Yi makes it, I'm afraid no one will use it.

This also involves the second thing that Lin Yi wants to make - perfume.

At that time, once Lin Yi can make perfume, then as long as the perfume is dissolved in this soap, it will definitely be able to get rid of the faint fishy smell in the soap.

So, Lin Yi began to call people again.

He first sent someone to find a blacksmith master who made ironware in the outer city of Yanjing, and then drew a drawing, asking the blacksmith to build it according to what was drawn on the drawing. Don't think about it, Lin Yi wants the blacksmith master to build a distillation tube.

There was no way, there was no glass in this world, so Lin Yi had to reluctantly replace it with an iron pipe.

Although the blacksmith master was embarrassed, saying that he couldn't create the thing that Lin Yi had painted, but under Lin Yi's heavy promise, the blacksmith master still took the drawings and went back with a happy face.

After explaining these things, Lin Yi sent the old guys in the store again, and explained that they picked a basket of different varieties of petals for themselves, the more varieties the better, and in addition, they also asked them to find spirits with a very high degree for themselves.

When these old fellows heard this, they immediately went to do it.

So, a day later, the blacksmith brought Lin Yi the distillation tube that Lin Yi wanted, and those old fellows picked more than ten baskets of different varieties of petals and spirits with a very high degree for themselves.

With these things, Lin Yi once again devoted himself to the great cause of making perfumes.

He first distilled the aromatic oil from the petals of the flower with a distillation tube, and then used different proportions of alcohol to dissolve the aromatic oil.

It is worth noting that although this process is very simple, the most important part is the ratio of alcohol and aromatic oil, which needs to be extremely accurate.

Helpless, although Lin Yi knew the direction of production, he didn't know the proportion, so Lin Yi could only rely on himself to explore little by little.

This time of exploration greatly exceeded the time it took Lin Yi to make soap.

It only took Lin Yi three days to make soap, but Lin Yi just groped for five days to explore the ratio of aromatic oil and alcohol.

In these five days, Lin Yi kept doing it, and after making it, he kept sniffing it with his nose, and after smelling it, Lin Yi felt that it was not the effect he wanted, so he poured it out again and started again.

"Huh?"

In the courtyard, Lin Yi held a small bottle and began to slowly smell the fragrance of the liquid in the bottle, and after smelling it, a happy look instantly appeared on Lin Yi's face.

"That's what it tastes like. This kind of taste is the most suitable! Lin Yi muttered happily to himself.

In five days, he finally relied on his own exploration again and again to find out the correct exchange ratio.

After figuring out this ratio, the rest of the matter seemed to be a matter of course, according to this ratio, he has made more than ten kinds of perfumes with different floral fragrances, such as lily incense, peony incense, osmanthus fragrance and so on......

Then, using these perfumes, Lin Yi picked out his favorite osmanthus perfume and incorporated it into the soap he had made before.

So, after eight days, the soap and perfume that Lin Yi wanted were finally successfully manufactured by him.

Of course, the soaps and perfumes that Lin Yi made now are naturally not as good as the real soaps and perfumes in his previous life, after all, they were purely industrial in his previous life, but at present, they can only be made by hand.

So, Lin Yi picked out lily perfume, peony perfume and osmanthus perfume, and was making soap with the corresponding fragrance, holding these six things, Lin Yi began to look up to the sky and let out a long howl: "My son is out of customs!! ”

……

In the courtyard, in front of the stone table.

Lin Yi sat on the edge of the stone table with a smug smile on his face.

Concubine Ya and the little white girls looked at the three small bottles and three squares on the stone table, and looked at each other.

"Ahem......"

At this moment, Concubine Ya finally couldn't help the curiosity in her heart, and then pointed to these things on the table, and asked Lin Yi, "What's that...... Childe, is this what you've been making up these days? ”

"Exactly." Lin Yi smiled proudly.

"I thought it was something, just three bottles, adding these three ugly-looking mysterious things, brother, I'm a little disappointed." Qingya pursed her lips and said.

When Lin Yi heard this, the smug smile on his face froze instantly.

"Vulgar!"

Lin Yi gently knocked on Qingya's little head, and said angrily: "You can't look at the surface of anything, will you know what is in this bottle?" Besides, what's ugly about this thing? Boxy, doesn't it seem decent? ”

When everyone heard this, although they all nodded, they all had disapproving expressions on their faces.

Seeing this, Lin Yi suddenly smiled helplessly, facts speak louder than words, since everyone didn't believe it, then, Lin Yi had to prove it with actions.

PS: By the way, Aoyagi is not a chemical engineering major, and the content of this chapter was written on a whim, and it was written entirely based on the memory left by Aoyagi High School when he was in chemistry, so naturally it is not very rigorous, just take a big look, don't dig too deep, thank you.