After the alchemical solvent was fully analyzed to extract the active ingredients, the precipitated sapphire blue solution passed through the filter paper and was introduced into a small crucible. Pei Renli pushed the alcohol lamp under the crucible and waited for the liquid to boil.

When the solution rolled and bubbled a lot, he immediately drew a rune in the air. Different from the usual situation of activating the spell, the rune fell into the crucible and continued to sparkle without disappearing.

Steam is released in large quantities as the runes fall into the crucible, drifts toward the collector above, and merges into the slender glass tube.

At this time, the glass tube has a certain arc, guiding the steam to the front condenser tube.

It is said to be a condenser tube, but it is actually just a wet towel placed on the glass tube that continuously drips water to maintain the cooling effect. Although it is simple, this method is quite effective.

The water vapor that passed through the condenser tube condensed back into liquid. The liquid that was originally royal blue turned into dark green after evaporation and condensation.

The liquid flows down the inclined pipe and flows into a graduated measuring cup. When the height reaches the predetermined value, Pei Renli opens the valve, and the liquid flows out from the pipe at the bottom of the other side and enters the brass outer shell.

Special instruments.

The center of this instrument is in the shape of a cross, and there is something similar to an hourglass at the upper and lower ends. However, the sand is replaced by a metal that can remain liquid at room temperature, that is, mercury.

When the dark green liquid passed through the instrument and reached the test tube at the other end, Pei Renli turned the cross-shaped hourglass in the center. The mercury that was originally at the bottom moved to the top and fell along the pipe. He used gravity to push the test tube as far as possible.

The air inside is drained to form a vacuum.

Wait until the mercury has completely fallen, trigger the mechanism, and the gelatin boiled with horns flows into the dark green liquid and mixes with it. Finally, the cork stopper that has been prepared long ago is pushed into the test tube under the action of the lever.

Pei Renli opened the latch, took the test tube off the instrument, and used fire paint to seal the mouth of the test tube again to prevent the cork from deforming and causing air leakage during storage.

This wasn't the end yet. He pulled out a square piece of paper from the other corner of the table, on which a dense magic circle had been drawn in advance.

Of course, drawing a magic circle is also a required course for mages, but the school does not have drawing tools, and Pei Renli cannot draw a circle with his bare hands. Instead of a straight line, he can find a straight object instead of a ruler, but a circle is more troublesome.

So he found beakers of different sizes and used them as compasses, and the result was an impressive success rate...

Place the test tube on top of the magic circle, hold one corner of the magic circle with both hands, and with the injection of magic power, the flickering magic light from the injection point slowly lights up along the lines of the magic circle.

The whole process lasted about five or six seconds, and the magic circle drawn with special ink was fully activated.

At this time, he tapped the test tube with his finger:

"Identify magic items."

The magical aura exploded instantly, and the magic circle originally drawn on the paper disappeared without a trace, which meant that it could only be used once. Various parameters such as the composition and properties of the liquid in the test tube came to mind like images.

After confirming that all the data were within the deviation values ​​stipulated in the formula, Pei Renli breathed a sigh of relief and placed the test tube on the test tube rack nearby. A flat bottle of strong acid was ready like this.

This alchemical potion is not for drinking. The correct way to use it is to throw it out and use it as a grenade. Once it comes into contact with the air, it will start to take effect, so the sealing requirements are very strict.

Ten days have passed since he returned to school. In these ten days, in addition to practicing spells, Pei Renli spent most of his time studying and making potions. And since he started from the lowest difficulty level, it is not easy to master the making of these potions.

It was difficult, even two bottles of the most commonly used and best-selling healing potion by adventurers were made.

Anything related to magic will become extremely expensive. A flat bottle of strong acid can be sold for a high price of one gold coin, but its material cost is less than twenty copper coins, and even in Naspa, which is gradually declining,

You can also buy it, it’s really very profitable.

What is even more profitable is the healing potion, because some of the required herbs are produced in the sea of ​​​​trees. Ravna and the handyman magic creatures Puni can collect them by wandering around the Demon King's City. The material cost is equal to 0.

But this does not mean that Pei Renli will be rich immediately.

It’s true that the price of the healing potion is five gold coins per bottle, but the purchase price and the retail price are definitely different. Otherwise, what would the store make?

In addition, there is no magic shop in Naspar. If you want to sell these things, you have to go to the nearest big city, Mingxing City. Magic shops have fixed suppliers, and no one will accept these "three-no products" casually.

No one knows whether your stuff is true or false.

Therefore, it is unlikely that you can make money from potion money in a short period of time. Currently, it is only for personal use and practice.

"Be careful. If you damage it, you'll have to pay for it."

"Teacher Grace, can you just sit there and drink?"

Turning around, the slovenly beautiful teacher Grace sat behind Pei Renli. From the look on her face, she probably drank a lot.

Pei Renli had a huge sum of 30 gold coins in his hand. Beakers and other equipment were not expensive, and it was not troublesome to buy them, but the mercury vacuum instrument was not something that 30 gold coins could afford. And even if he could afford it, this

This kind of precision instrument needs to be ordered in advance and is not in stock, so you can only borrow it from the school.

It just so happened that Teacher Grace was in charge of all magic-related courses in the school, and she had to give her nod for permission to borrow alchemy instruments.

So Pei Renli had to bleed a lot, and while he was on the street to buy materials, he stopped by a tavern and spent money to buy a bottle of good wine, which made Teacher Grace relent.

In fact, they are all low-level magic potions after all. There are other ways to make strong acid flat bottles without mercury vacuum, such as adding antioxidants and sticking a piece of specially treated red phosphorus behind the cork to let it burn out the contents in the test tube.

Oxygen, but the quality of the strong acid flat bottles made by this method will drop a lot.

Of course, the things for personal use must be the best. Besides, we don’t only need strong acid flat bottles, so we can only spend a lot of money.

To put it bluntly, we are still poor.

Talking about money can be really nerve-wracking.

Having said that, ten days have passed, and the reward that the young lady promised at the beginning has still not been delivered. A windfall will make his money much easier. If the reward is enough, he can even buy a magic item to keep with him.

In this way, the combat effectiveness can be greatly improved.

Thinking about finding an opportunity to go to Muxing City to investigate again, Teacher Grace poured red wine into the glass and said smoothly:

"Did you research the runes you used yourself?"

The rune she was talking about was the one inside the crucible.

Making potions does not require the participation of any magic at all. The process completely relies on experience and techniques. However, when magic is involved, the efficiency will be greatly improved.

Pei Renli found a book in the school library called "An Overview of the Practicality of Rune Magic in Potion Preparation", which mentioned several suitable runes.

The rune in the crucible means "release", and the purpose is to release the active ingredients into the steam, which can greatly reduce the dependence on the operator's experience.

In actual experience, there is indeed an improvement, but according to calculations, about 40% of the active ingredients are still wasted.

Pei Renli, who was still trapped by poverty, felt that this was not possible and started to improve the runes.

After all, he has a golden finger that can understand all words. Improving the runes is actually changing the runes into words with the same meaning but in different languages.

This is also one of the reasons why mages must learn Elvish, Dragonic and magic writing.

If you are weaving a spell with runes, you cannot replace it casually, otherwise the spell will easily explode in your face. But in alchemy, it is no problem. At most, the beaker will be destroyed and the materials will be wasted.

After trying more than a dozen times, he found this rune. The utilization rate of effective ingredients can reach about 75%. Although there is still a lot of waste, it is already very good.

"Do you know what language that is?"

Pei Renli really doesn't know this. His ability to read text can consciously switch languages, but he won't tell you what language it is.

Without waiting for Pei Renli to answer, Teacher Grace said drunkenly:

"I thought from the beginning that you might come from a family of scholars, but I didn't expect that you could even speak the ancient Elvish language."

In fact, not only the teachers thought so, but also the classmates thought that Pei Renli came from a scholar's family. After all, he didn't look like the type who had been exercising physical strength since he was a child, and he was the leader in language and writing.

It takes 5 to 10 years to train a qualified mage from scratch, most of which is spent learning language and writing. Pei Renli has skipped the most time-consuming part, plus the way he uses rune magic.

Casting spells, so progress is fast.

It is no wonder that in the eyes of outsiders who do not know the inside story, Pei Renli must have come from a family of scholars. He has been proficient in various languages ​​since he was a child, so learning magic can get twice the result with half the effort.

"You are already a qualified mage, the rest is just a matter of continuous accumulation."

Pei Renli quickly humbled himself. Teacher Grace suddenly said these things, and she always felt that she had another purpose.

By the way, the so-called qualified mage actually has a very low bottom line. Anyone who can cast two F-level spells plus one E-level spell can be called a qualified mage.

"But the spell books in school probably won't satisfy you, right? Have you considered the future?"

To be honest, Pei Renli was thinking more about the present than the future. After all, he didn't know whether he could survive the next Demon King Arena.

However, everyone has to plan for the long term, and Pei Renli did think about it a bit.

All the spells in the library are low-level. The highest level is only D, and there are not many of them. Judging from Pei Renli's current efficiency, he will be able to master all these spells in about half a year to a year at most.

What to do next?

This is indeed a problem.

"I personally recommend that you go to Magic University for further studies. Although the entrance fee is relatively high, it is the best choice for you."

Is there actually a magic university?

Pei Renli was indeed moved, and he asked:

"Threshold fee? How much is it?"

"The price may have increased in the past two years, but it should still be around 3,000 gold coins."

Three thousand...

Once again, anything related to magic is ridiculously expensive.

"How about you save the fee slowly after you become an official adventurer in the future? Are you interested? I happen to have some connections there and can write you a letter of recommendation."

Although the fee of three thousand gold coins is astronomical, Pei Renli really has no choice.

He thought for a moment and muttered:

"Teacher, what do you want to write me that letter of recommendation?"

Grace was stunned for a moment while holding the wine glass, and suddenly realized:

"Oh, yes, you can still do this. Then let's do this, and you can find me a bottle of good wine."

“…..”

Gan!
Chapter completed!