The success of soap making depends greatly on the concentration of lye. The factor that makes it difficult to make by hand is always that the concentration of alkaline substances is too low.

A dry wooden stick was inserted into the solution, and he carved a knife according to the location of the water immersion.

Lurik believes that due to the previous high temperature, all the potassium nitrate from the plant ash in the solution has become potassium nitrite, so it becomes a very toxic existence to the human body, and its toxicity comes from its nitrite. As long as this nitrite is in contact with fat, it can become alkaline but harmless soap.

Even if he doesn't know the specific solution, if he continues to cook, the water in the urn will be evaporated by two-thirds, and the rest is definitely a high-concentration solution.

What's more, a large amount of crystals will precipitate in the urn if it continues to cool down the pottery clay urn.

As long as the water in the urn is lost to only one-third of the length of the immersion point of the wooden stick, it is enough.

So, a fire in the chief priest's house became Rurik's testing ground, and he himself was gloriously announcing to all the priests that the greatest action is now.

This glorious declaration is not too tight, because it feels that it is too late, and the high priest Veria, who is already planning to go to bed, walked up to Rurik with a cane to see what he was going to do.

Lurik has received the attention of all the priests, but now it seems that the child is just boiling a jar of brown-yellow water with a peculiar smell.

Because there are still many impurities in this water, they are not the key substances for making soap, but they exude the unique burnt smell of charcoal. The smell rushes into the nostrils of the priest, which proves that the water and charcoal have a special relationship.

The water was boiling, and a lot of steam began to diffuse in the room, and they quickly ooze out into nature along the cracks in the house.

The long house of the priest has a lot of gaps. It does not have a special chimney. The people inside never consider whether an indoor campfire will bring poison.

Everyone does not have the concept of carbon monoxide poisoning, that is, the flaws in their construction of houses. The large number of gaps inadvertently caused the heat to always be lost quickly, forcing them to frequently light charcoal fires in winter, so there is no poisoning.

Therefore, the peculiar smell of the boiling solution gradually disappeared, and the inside of the brown pottery urn was seen. The water line disappeared at a speed almost visible to the naked eye, leaving a cleaning mark on the wall of the urn.

The current solution is very dangerous, not only because it has a high temperature of one hundred degrees, but also because its alkalinity is rapidly increasing. If the potassium nitrite inside becomes pure crystals, it is an extremely dangerous alkaline substance that can corrode quickly. Touch its flesh.

But the crystallization of it mixed with other substances is the key to a new era of human melee.

The priests who were watching wanted to see something newer. They stared for a while and realized that it was just pouring water, and gradually lost their interest.

After all, it is very late. Some people don't want to spend it here anymore, so some people return to their sleeping nests and close their eyes.

Rurik's work is really just beginning. In order to get the soil soap out earlier, he must make a decision in his heart. This situation must work until dawn, or his spirit will fall because of excessive fatigue. .

The water level in the urn continued to drop. When the lower priests left one after another, Rurik was accompanied by loyal Lumia. Not far away from the two of them, there was still Veria waiting for a result, and continued to sit cross-legged and closed her eyes to doze on her soft leather cushion.

Lurik didn't want to disturb those people. He worked hard, but he was disturbed by uninvited guests.

It was really late, and he should have returned to his home to sleep in the past.

The son has been staying in the long house of the priest. Today, the son is still clamoring about a new invention, a baby that can easily wash his hands. Otto didn't interfere with his son's plan at all. Until late at night, his son hadn't come back, and the heart of an old father couldn't help worrying.

Otto hurriedly rushed into the priest to witness, awakening many sleeping people, and also caused the dozing Veria to suddenly raise his head.

"My leader! You! You shouldn't rush in in such a hurry, what are you going to do?!"

"I..." Otto looked around anxiously, only to see two young figures working around a campfire, and his anxious heart faded away.

"Ah, great priest, I just came to take Rick home to sleep."

"He's there, don't worry." After that, Veria pointed casually.

There is a strange smell in the air, Otto's nose is very keen to smell this abnormality. A strange smell came from the son, and the pottery urn that the two children were playing with along with the son's servant caught his attention.

"Ruriek, what are you doing?"

"I know you are here, Dad." Rurik said perfunctorily.

"Is this the pottery urn? You said you want to do something special, have you achieved results?"

"That's it." Rurik was very proud and wanted to introduce Otto Haoshi. But after thinking about it, the lengthy description is nonsense, and only the real thing is the last word.

Leurik thought for a while, and mumbled: "I won't go back today, I will do a great thing. Dad, you go back and tell mom that when the daylight comes tomorrow, I will definitely bring out my invention."

But Otto could hear that his son just announced that he would stay up all night.

"Ah? My child, you are not a hunter yet. You don't need to stay up all night. You are too young. I believe you will succeed. Now I'd better take you back to sleep."

"No! My work has reached a critical moment." Rurik increased his voice.

"Maybe, the work can be given to your servant. Listen, the servant was born for this." As he said, Otto winked at the ignorant Rumia.

Otto's idea was exchanged for Rurik's stern rejection of course.

He wondered, I am an old guy who is already forty years old. It is hard enough to pretend to be a seven-year-old child and pretend to be innocent. Is it true that the so-called adult has to force a child to deprive a child of the right to play with toys.

Ah, this toy is extremely dangerous lye... Is this a toy?

No, Lumia doesn't understand anything at all. She will do many things for me in the future, provided that I have to teach her the first time.

Leurik stomped his feet, "Dad, you must believe me this time, you will get a huge fortune because of the right choice tonight."

"Wealth? My child, you are my greatest wealth." Otto squatted down, his eyes converged, he was completely coaxing a child to pinch his son's soft face, "You are only seven years old, in the future you Of course you have to go through the challenges that a real man should have, and now you really should sleep."

"No! I will never be a man who can only row and fight, and I want to be a wise man!" Excited Nakaru Rick pointed to his brain, "I want to use my strength to become the leader, and I want to use my brain to make Everyone becomes wealthy. Dad, you must listen to my opinion, don't you believe in your son? Or you... Do you think I am the same as other children?"

A question to the depths of the soul calmed Otto.

asked myself, when the child was holding his "destroyer" sword in the snow under the background light to protect his current servant, this child was indeed very different from other little boys.

At that moment, Rurik was not a child at all, as if possessed by some great being.

Seeing that the son is so persistent, he is afraid that he will be forced to run away like a lamb, and the child cannot sleep peacefully on the soft leather blanket.

Otto didn't speak any more, and left sadly.

The dispute is over, and the huge room is quiet again.

Villa can close her eyes again, knowing that no one will disturb her dreams tonight. She was also curious about Rurik's invention. Listening to the child's simple description, the invention was a mixture of seal oil and yellow water in the urn. Before Rurik explained, no one in the tribe had ever tried this.

Even the priest who often boiled oil, even when he was young, did not have such a whim. Perhaps, the convergence of the two will indeed happen miracles, but that will no longer give the elderly Veria greater mental stimulation. She is too old, and her curiosity for novelty is also very low.

Villa returned to her cubicle, lying in a sleeping nest made of animal skins, and soon fell asleep.

The hall of the long house of the priest suddenly became empty, and Lurik looked at the quiet scene around him, and couldn't help comforting Lumia, who couldn't help but yawn.

"Ah, now we are the two of us."

"Rurik, you? Continue?"

"Yes, I need your help next. My sister, you and I don't have to rest tonight, because I promised my father that I will produce results."

Lumia understood the meaning, she did not refuse, nor did she have the right to refuse, she could only do her best to obey the master's order.

This is not an unacceptable command, it is even full of fun.

Now, the roasted pottery urn rests, and the hot solution inside is gradually cooling. Rurik still didn't know the concentration of potassium nitrite in the solution, and it was seen that the immersion position of the wooden stick had reached the target value, presumably its concentration was sufficient. He believes that the saponification reaction can start as long as it reaches a critical value, and the next problem is the relationship between the concentration of the solution and the hardness of the soap.

In fact, Rurik is also the first time to make earthy soaps. The principle is as simple as that of death. To create exquisite soaps, or even soaps with exquisite and charming fragrance, is my ultimate desire in this regard.

Because as long as it succeeds, the people of the tribe will use it to wipe and clean their bodies, and the fragrance will replace the inherent perspiration odor, and even the bad body odor. Especially those who are willing to dress up their appearance, they will pay a huge sum of money to buy a piece of soap that makes themselves clean and scented.

Lumia hung a pottery urn full of seal grease on the bonfire. Gradually, the semi-solidified grease gradually became a pure liquid.

"That's all right? Does it need to be hotter?" she asked Rurik.

Lurik stretched out his small hand, tentatively touching the liquefied oil, a strong pain on the hand.

"Enough is enough. If it boils, our work will be difficult."

The saponification reaction requires a suitable temperature, and there is no doubt that the boiling oil is purely overheated.

He asked Lumia to heat up the grease again, and then asked her to remove the pottery urn.

"Lumia, the most important thing is now, you avoid it for the time being."

"Why? I will help you."

"No. You temporarily observe my actions, and you have to remember my actions. You will do these things yourself in the future."

"I will."

Lumia walked aside with a nervous heart, she still stared at Rurik's movements.

There is a way to add more oil and water. If you know the precise concentration of the key material in the solution, as well as the precise mass of all the materials, after some mathematical calculations, Rurik can master the blending ratio of all the substances in advance. Reluctantly, he can only use a very stupid method, which is to use a wooden spoon to pour the hot liquid oil directly into the precipitation solution of plant ash of unknown concentration.

The first spoonful of fat is poured in, and the saponification reaction occurs instantly.

The bright and light yellow grease suddenly changed color, and there was still a little air bubble.

He continued to pour the oil, and finally he poured all the oil in the entire pottery urn.

But oil and water are naturally repellent, and oil is only particularly interested in alkaline substances dissolved in water.

"Ah, great. I slowly pour the oil and there will be no violent chemical reaction. Then..." Rurik paused, and beckoned with a satisfied smile on Lumia, who carefully observed her face, "You Come here, next is your job."

Lu Mia is now a servant, if she has a lot of time to idle, she will definitely cause others to criticize.

Rurik really needs such a sister to do a lot of things. She was only seven when she was ten years old. Although her mental age is not like this at all, a seven-year-old child frantically stirred this mixture of oil and water with a wooden stick, even though she was quite strong. It will be exhausted soon.

"Lumia, take a wooden stick, and then you will stir this pottery urn. This will be a tiring process, in order to make a baby, you have to do this."

Afraid that she could not understand Gnosse, Rurik explained it slowly, but even explained the key words in the newly learned ancient Sami language.

"I will stir hard, I will make you happy."

Lu Mia didn't complain. It was an honor to be a servant to do something great for her "brother", otherwise the sister would be ashamed of herself.

She stirred the material in the pottery urn with her selfless and heroic attitude. Soon, the change of the material surpassed her cognition.

The saponification reaction has started in full, and Rurik squinted his head and watched with satisfaction at the chemical changes that were taking place.

The pale yellow, rather transparent grease has changed its properties, and it is becoming thick as cream. Because of the color of the plant ash liquid, the mixture in the urn turned into a brownish-yellow paste, accompanied by a special smell, just like normal soap.

The diffuse smell ~www.mtlnovel.com~ is exactly what Rurik hopes to smell.

His heart is very excited. He used plant ash and seal oil to make soap in ancient Northern Europe just a thousand years ago.

He was very sure that the substance in the urn was soap, but the dissolved alkaline substance was quickly combining with fatty acid molecules because of Lumia's selfless stirring.

A lot of water needs to be removed, but it should not be removed completely.

Soap can be sun-dried as hard as a brick, and the water content in it can be very low. Even this kind of soap feels bad when used.

Too much moisture is of course not good, the soap bar is too soft, and the active ingredients are relatively small, and it is not durable.

The soap base liquid has been completed, and it is still very hot. Even if Lumia's arm is already very sore, the heat of the paste can instantly scald the skin and flesh that touches it.

"Lu Mia, are you tired?"

"Not tired! I can hold on."

In fact, she must be very tired. The ten-year-old girl's forehead is already covered with sweat, and her hands have slowed down.

"Stir slowly now." Rurik patted her on the shoulder, but was taken as an encouragement by the girl, who gritted his teeth and stirred hard.

"I really can't do anything with you. Okay, so you won't be able to go grazing tomorrow because of excessive exhaustion. Okay, I will appoint you to do a big job in the future. It is enough to hand over the grazing to others." Muttered and stayed Rick went to fetch the small wooden box prepared in advance.