"Bang. Boom.. "The two teenagers next to me are holding sledgehammers, and you hammer back and forth against the salt ore placed on the slate.

Lu Siqi squatted not far from Mu Heng, staring at the burning fire with his eyes, and he was fascinated.

After Steward Zhao set up the pot, he commanded a group of people to come in with a large vat, followed by a few men carrying water.

Mu Heng looked at the charcoal powder about the size of the grit in his hand, and felt that it was almost there.

"Oh, so many people." Mu Heng, who was focused on the thickness of the charcoal, didn't notice that so many people suddenly came, and he was still a little nervous inexplicably.

After a while, each group almost finished the work on their hands, Mu Heng inspected left and right, and saw that most of the salt ore had turned into powder, and Lu Siqi burned charcoal and no flames, and the burning should be relatively sufficient.

"Childe, what's next?" Steward Zhao saw Mu Heng nodding uncontrollably, and understood that the next steps could be carried out.

"Take some salt ore powder and put it in these pots, and then soak it in water." Mu Heng said to the two teenagers.

"Big bull, two tigers, do as the son instructs." Steward Zhao followed the instructions, and then asked Mu Heng: "Childe, how much should be put in each wooden basin?" ”

"Let's put two handfuls each." Mu Heng still doesn't know the amount of salt in these salt ores, so he can only try to do it first.

"Yes." The two teenagers answered sharply.

"Don't be idle, everyone, follow along." Steward Zhao said to the seven or eight people who were standing there watching.

"Go to two people, sweep the charcoal ashes burned by the general with a dustpan, and prepare them for the son." After all, he is a housekeeper and arranges things in an orderly manner.

With the help of Steward Zhao, Mu Heng also had a lot less trouble. After all, I am suitable for academics and not very good at management.

"Stir as much as I do to increase the speed at which the salt dissolves." Mu Heng stirred in the wooden basin with his hands, making a demonstration.

"Learn a little bit."

"Yes."

"Senior brother, is there anything else you need to do?" Lu Siqi looked at Mu Heng's non-stop command and demonstration, and there was already dense fine sweat oozing from his forehead.

This scene is very similar to the scene where the hairy foot son-in-law just arrived at his mother-in-law's house to work actively.

"Then two filters." Taking advantage of the gap between dissolving the salt, Mu Heng continued with the tools he needed next.

I took a bamboo tube, sawed off the other side of the bamboo, and at the same time drilled some small holes in the other side of the bamboo.

To do this, lay several layers of gauze on the bottom of the bamboo tube, put the gauze with ground charcoal powder, and finally spread several layers of gauze, which makes a simple filter.

The second one is much easier to do, and it takes a while to get two filters.

"Now I'll explain it to you." Mu Heng was worried that everyone would not be able to understand it, so he took the time to explain it so that everyone would not know what it was.

"The first step is to dissolve the salt in the salt ore into water, which should be easy for everyone to understand." The first step is not difficult, and the salt that the people eat now comes from this way.

"The finer these stone powders are grinded, the more salt can be produced in the end. However, it is basically about the same to this extent. Mu Heng grabbed a pinch of powder and showed it to everyone.

"I see, the finer the grinding, the more it will come out."

"Childe is really erudite, and he knows all this truth."

“。。。。”

"Everyone, be quiet." Mu Heng interrupted their gossip, some lamented the salt ore, some praised Mu Heng, and some said too much, Mu Heng himself couldn't listen to it.

Mu Heng then picked up one of the wooden basins, carefully poured the salt water into the other empty basin, and added: "This step, you need to be steady, try to block the sand at the bottom of the water, and play a preliminary role in filtration." ”

And then he said, "The second and most critical step is the next step. Why is this the most critical step, because this step is to remove the impurities dissolved in the water from the mineral salt, that is, the impurities that give the salt that is usually eaten. ”

As soon as these words came out, everyone present widened their eyes and waited for his next move.

Lu Siqi is no exception, the people of the Star Kingdom are tortured by the salt government, and they have to eat mineral salt that is difficult to swallow, because of these bitter tastes that are difficult to remove, and even harmful to the body.

Now listening to Mu Heng's meaning, these impurities can be removed, and this drawback can be solved, how can you not be moved.

"Childe, do you need these plant ashes?" The second tiger saw Mu Heng holding a dustpan containing grass ash in his hand, and said curiously.

"Cleverness, indeed, depends on these ashes." Mu Heng gave him an affirmative reply.

"Really, plant ash can remove bitterness?"

"I can't believe it."

"If it's that simple, why hasn't anyone found out before?"

Seeing that everyone didn't believe it, Mu Heng was not in a hurry to defend himself, this needs to be spoken with facts. Otherwise, no matter how much you say, it's all a fake.

"Senior brother, is the grass ash really useful?" Lu Siqi remained skeptical, although she wanted to believe Mu Heng.

Mu Heng didn't answer her clearly, but just gave her a reassuring look. Then, holding a dustpan made of bamboo strips, he took two or three handfuls of plant ash and sprinkled them into the preliminarily filtered brine.

It's still the old way, stirring with a wooden stick to speed up the dissolution and reaction.

Looking at the salt water that had turned into dirty, Lu Siqi couldn't help but show a look of disgust.

"This step also needs to be allowed to sit until these impurities sink to the bottom, which can reduce the number of filtration times." Mu Heng explained with the movements in his hands.

"After letting it stand, it is the same as the previous simple filtration step, and slowly pour out the top layer of clean salt water." This time it was much more difficult than the last time, after all, the first time the impurities were the sand that had sunk to the bottom, and this time there was also suspended plant ash and solids formed by the reaction.

"Senior brother, can you eat the salt refined from such dirty water?" Lu Siqi noticed that the water poured out by Mu Heng was not as dirty as just now, but it was not clean, and the gray salt water did not look like it could be compared with the word "eat".

"Of course it won't work, that's why we need to filter it further." Mu Heng gave her a gentle look again.

Slowly, Mu Heng no longer minds giving a man gentle looks, and I have to say that habit is really a terrible thing.

"The third step is filtration. What you need to use is this filter I made, and the method of making it has been demonstrated just now, so I won't say much about it here. ”

"Before filtration, we have to wait for the sand in the basin to settle down, so that there can be a little less impurities when filtering." Mu Heng scooped out a scoop of salt water from the basin and prepared to pour it into the filter.

"Childe, although this salt water looks colored, it is also crystal clear, isn't it already pure, why do you need that filter?" The young man named Erhu asked the common question in everyone's hearts, and also asked Lu Siqi's heart.

"That's a good question." Mu Heng looked at this fifteen or sixteen-year-old, his eyes shining with spiritual light.

"This salt water looks pure, but in fact, there is still a lot of invisible grit in it, if you don't filter it, the salt that comes out of the boil will have a grinding feeling." Mu Heng patted the young man's shoulder and explained with a smile.

"Is there any sand in there?" Everyone listened to Mu Heng's explanation, and they were very puzzled, aren't all stones sunk to the bottom, how can there be sand in this water.

Mu Heng glanced at Lu Siqi, who had a curious baby's expression, and said with a slight smile: "This principle is very troublesome to explain, you can try it later, is there a difference between filtered and unfiltered salt." ”

"Let's keep watching." Mu Heng kept in his hand and poured the salt water in the scoop into the filter. As the amount of water continues to increase, water flows out from the bottom of the bamboo tube.

After the charcoal is adsorbed with impurities, the color has faded a lot.

After a few back and forth, a wooden basin of salt water has been collected.

A second filter is then used to re-filter for a second pass.

"Huh?" Lu Siqi's eyes had never left Mu Heng, and it was very strange to see the pure salt water that had been filtered twice and had turned into colorless.

"Senior brother, how did you do it? How is it that the color in the water disappears after doing this twice? Lu Siqi didn't understand how these common things could be combined to have such a peculiar effect.

Looking at each other with strange eyes, Lu Siqi now believed more and more that Mu Heng could refine fine salt.

"If you really want to know, I'll hand it over to you slowly in the future, it's hard to explain it clearly in a sentence or two now." Mu Heng waved his hand and motioned for her to speak later.

"Hmm." After speaking, Lu Siqi's heart was hot and full of expectations.

"All that's left is the final step, boiling the salt." Pour the filtered salt water into the pot and signal that the two tigers can start the fire.

After a while, the salt water in the pot began to boil, and as the heat continued to dissipate, the salt in the water slowly precipitated.

"It's out, it's out." Lu Siqi couldn't help but be pleasantly surprised when he saw the white crystals like snow in the pot.

"It's... This is.. Fine salt. Steward Zhao stared at the crystals at the bottom of the pot and said in surprise.

"It's really fine salt, Childe really did it."

"It's really strange, why is the salt we boiled is coarse, and the salt boiled by Childe is so fine?"

Mu Heng didn't answer their questions, twisted a little salt from the pot, put it in Lu Siqi's hand, and said, "Taste it." ”

Lu Siqi also has this intention, the taste of salt is the most important criterion for judging the success of this attempt.

At this time, the taste of salt seems to be not only a taste, but also the key to whether it can destroy the current salt policy and save the Star Kingdom from fire and water, Lu Siqi can't help but be a little nervous.

Now I didn't care that the salt was extracted from the dirty water just now, so I cautiously and expectantly stretched out my tongue and added a mouthful of salt, and suddenly my face showed surprise.

She couldn't believe it, she tasted it again, and was sure that it was only salty, Lu Siqi's eyes widened, and he looked at Mu Heng with enthusiasm.

Although it is only a few salty flavors, this moment is more delicious than the delicacies of the mountains and seas.