"Ding! Mission Released! ”

Just as Shen Wen moved one of the boxes of silver to the table, playing with silver ingots to treat his poor defects, the sound of the system's machinery sounded in Shen Wen's ears.

"Mission: Master the five basic skills necessary for a traverser, papermaking, glass, soap, distilled spirits, and salt making."

"Requirements: Do not use modern scientific and technological equipment, and can only rely on the props of the world or the host to rely on the materials of the world to make their own."

"Rewards: Wealth earned with the Five Skills."

"Do you pick it up? Yes|No. ”

Shen Wen glanced at the content and requirements of the task, was slightly stunned, and the corners of his mouth couldn't help twitching a few times.

Master the five essential skills of a traverser?

Papermaking? Glass? Soap? Liquor? Salt production?

What is this task?

"System, are you sure you didn't send the wrong task?"

Shen Wen looked at the contents on the system panel and couldn't help but confirm.

If it was for him to go to a certain world to learn medical skills, or to acquire medicinal materials, Shen Wenzhi would be easy to understand, but what happened to the five necessary skills of this traverser?

"To improve the ability of host healing, the five essential skills of the time-traveler are powerful money-collecting skills in the movie world or novel world of the ancient background, specializing in curing poor defects."

The sound of the system's machinery sounded again, and even after listening to it a few times, it was very uncomfortable.

"Does the host require a change in the sound perception of the system? [Yes?] 【No?】 】”

The system responded very intimately.

"Lolita: Boom ·······"

"Girly voice: hee-hee-hee-hee······"

"Tsundere: Hum Hum ······"

······

Shen Wen, "·······".

"The mechanical sound is very good, or the mechanical sound is the best, don't talk about other sound senses, it's my lack of taste, and I haven't known how to appreciate it."

Listening to all kinds of Wu Nong's soft, sweet and crisp system tones, Shen Wen only felt that his hairs were upside down, his scalp was numb, and he stopped him again and again.

"Let's discuss the mission."

Shen Wen shook his head and hurriedly changed the topic, allowing himself to forget the scene just now.

If the tall system becomes Lori, the next picture is beyond imagination.

"Mission purpose: to improve the host's own quality and skills, and be able to cope with and treat various deficiencies."

"Mission details: During the mission, if you enter a different world, in order to allow the host to adapt to the cultural customs and language habits of the different worlds as soon as possible, the system will arrange a reasonable identity, and carry out a certain appearance modification to instill the memory of the substitute character."

"During the mission, when you enter a certain movie world or a novel world, no matter how long the host spends, the Chrono Medical Center will only be in the past minute, and the host itself will not have any aging."

"Warning! There is a certain danger that the host enters the movie world or novel world of a certain party as the ontology, and can choose to fail the mission at any time and exit the world at any time. ”

"If the host encounters a life-and-death crisis, the system forces the host to exit the world where it is located, and the mission fails."

······

Regarding every piece of information about the system task, Shen Wen read it carefully, for fear that he would miss a certain one.

Judging from the requirements of the system task, this is to enter another world to perform a mission, and if there is a little accident, it is a big problem.

"Papermaking, glass, soap, distilled spirits, and salt making shouldn't be too difficult to make by hand, right?"

Shen Wen is not an indecisive person, but he is not a reckless and ignorant person, he is very serious in everything he does.

The system allows him to enter another world to complete the system task, but he does not want to let him use modern technology and equipment.

It is possible for him to enter the world of the background of the Qin Dynasty, the world of the background of the Tang Dynasty, and even the world of the background of primitive society.

He had to learn in detail about the fundamentals of handmade paper, handmade soap, and so on.

"Papermaking? Materials are bamboo, hemp? What are the steps? ”

"Glass? Burning with sand? ”

"How do you make soap?"

In addition to distilling liquor and salt making, Shen Wen has some clear ideas, but three of them are confused.

But how could those travelers back to ancient times easily make paper, burn glass, and make soap?

"Principles of Industrial Soap Manufacturing: CH2OCOR – CHOCOR + 3NaOH – 3R-COONa + CH2OH-CHOH- CH2OH – CH2OCOR"

"It's definitely not this soap making method!"

Shen Wen took out his mobile phone and selected one of the difficult points to search, looked at the principle of the soap-making process, and vetoed this production method without hesitation.

Unless the system wants him to stay in some ancient world for decades, or even centuries.

"Artificially made soap."

Shen Wen couldn't help but search in detail.

"Ingredients: lard or other animal or vegetable oil, NaOH solution, table salt, water, pot."

"Production process: add water to the pot, add caustic soda (NaOH solution) at the same time, wait for the caustic soda to dissolve, add grease, continue to heat and stir constantly, continue to heat after the materials in the pot boil, and stir constantly to make the oil fully saponified······· This process takes about a day. ”

"The sodium high-grade fatty acid produced in the process is the main ingredient of soap, and after the saponification in the pot is completed, add salt, and stir to fully dissolve the salt, so that the soap base is condensed, and let it stand for 3~5 hours."

"Then according to the demand, make different molds, when out of the pot, multiply the upper layer of soap liquid and put it into the mold, and wait for it to slowly solidify and form."

After carefully reading the soap manufacturing process searched, Shen Wen knew that this manufacturing method was required by the system.

"Animal and vegetable oil is easy to get, and salt is no problem, but the difficulty is in NaOH solution (caustic soda)."

“ CaO + H₂O =Ca(OH)₂”

“Ca(OH)₂+Na₂CO₃=CaCO₃↓+2NaOH。”

Looking at the NaOH chemical equation that only needed to be made by hand, Shen Wen's eyelids couldn't help but jump.

Because, this involves two new substances, CaO and Na2CO3, also known as quicklime and soda ash.

There is no need to worry about the raw material of soda ash Na2CO3, and after some seaweeds are dried, the burned ash contains alkalis.

In addition to this, a large amount of trona comes from minerals, mainly buried underground or in alkaline lakes.

"CaCO₃ = high temperature = CaO + CO₂↑, the calcination temperature is often increased to 1000~1100 °C."

"CaCO₃, also known as limestone, limestone, stone powder, marble, etc., is one of the common substances on the earth, found in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of animal bones or shells."

"All these chemical reactions that I found in the system are projected."

Shen Wen rubbed his brows and commanded.

"Materials: lard or other animal and vegetable oils, NaOH solution, table salt, water and pots, among which NaOH solution is the difficulty."

"The NaOH solution requires two chemical species, CaO and Na2CO3, which in turn require CaCO₃ and high-temperature combustion materials."

"In other words, only nature provides materials, animal and vegetable oils, salt, water, pots, high-temperature combustion materials (coal), CaCO₃ (rocks), Na2CO3 (trona)."

"Every traverser is a good chemist and physicist."

Just the artificial production of soap requires this series of analyses, but what about artificial paper and fired glass?

"The traditional handmade paper manufacturing method has a complete set of production processes, no matter what kind of raw materials are used, what kind of paper is made, it is basically the same step. These main production processes are: foaming, boiling, washing, whitening, beating, scooping, drying, baking, ······"

"The main raw material for making glass is quartz sand, quartz glass can be made from quartz sand alone, but the melting point of quartz sand is 1750 °C, such a high temperature can not be achieved in ancient times."

"Therefore, the ancients reduced the melting temperature of quartz sand by adding fluxes to the raw materials, usually natural soda ash, plant ash or lead, and also needed to add some limestone as a stabilizer·······"

When Shen Wen carefully straightened out the basic principles of artificial papermaking and firing glass, he couldn't help wiping the cold sweat on his head.

Fortunately, I checked it carefully before taking over the system task, otherwise it would be a big trouble.

"The traversers are too awesome!"