Stop adding firewood and just wait for the fire to slowly die down, using the residual heat to evaporate the remaining water in the pot, thus obtaining coarse salt.
After the initial physical filtration, the coarse salt is almost completely free of fine sand, making it very white. Once the pot cools down, all the salt at the bottom is taken out and placed in a coconut shell, where it is crushed with a small wooden pestle. It looks almost the same as regular salt, equally white and flawless, except that there are still some slightly larger particles.
Li Sheng dipped a little bit of salt into his wet finger and tasted it on his tongue. It was still bitter, which was very different from the salt he usually ate. This was because, in addition to the visible impurities, there were also some chemical impurities mixed with the salt.
For example, magnesium, barium, sulfate, etc.
These are the things that actually harm the human body when ingested.
"Our current salt is essentially still crude salt, so it needs to be purified again because it contains many chemical components that are harmful to the human body."
At this point, some viewers raised questions.
"In TV dramas, I see that ancient people ate coarse salt. If coarse salt was harmful to the human body, wouldn't they have died? I've never heard of anyone dying from eating coarse salt in history."
Li Sheng couldn't help but laugh at these words.
"Eating coarse salt won't kill you instantly, but you can think of it as a super slow-acting poison. The lifespan of people in ancient times was not as long as that of people today. Nowadays, it's common for people to live past sixty. In ancient times, sixty was considered a long life. The length of life is closely related to lifestyle. The most obvious harm of unrefined coarse salt to the human body is that it corrodes teeth, causing them to fall out. It also aggravates kidney disease. The damage to the kidneys is the greatest after those harmful chemicals enter the body."
But it must be difficult to separate the chemicals and salts that are mixed together, right?
The process of making filters to separate impurities such as fine sand is something everyone is familiar with, but separating things that are invisible to the naked eye is very difficult, and most people may not be able to do it even if they have the means.
Because this skill is not needed in everyday life.
But he had done his homework. When he learned that the place to survive was an island, he made thorough preparations. He included refining salt as one of his essential skills, as he knew the importance of salt to the human body.
"Actually, purification is not as difficult as everyone thinks. Let's prepare another saturated concentrated brine."
This time, Li Sheng used a smaller bowl filled with clean fresh water. He kept adding the extracted coarse salt into the bowl until it was saturated. Even if more salt was added and stirred, it would not dissolve anymore.
Pour all the remaining coarse salt into the mixture, heat it over a fire until it boils, then pour off the water on top, leaving the undissolved salt to dry in the sun again.
Just to be on the safe side, he repeated this step twice. Finally, he crushed the salt, dipped a little into it, and put it in his mouth. Then, it no longer tasted bitter.
This operation is very simple, but it seems that everyone doesn't quite understand it.
"What does this mean? I feel like Yewang is fooling us. Is this what purification is?"
"Add some water, boil it again, and then pour out the water. What kind of purification is this?"
"This method is so simple and straightforward, it's hard to fool me."
"I think the streamer is kidding us. Is there really a difference between purified and unpurified?"
...
Although everyone didn't understand, he patiently explained again: "This is because saturated concentrated salt water cannot dissolve salt, but after heating, it can continue to dissolve the other chemical substances mixed in the salt. After high temperature, the other chemical substances in the salt dissolve in the concentrated salt water. I pour out the concentrated salt water to remove other unsaturated elements. After two processes, what remains is a purer salt. Can everyone understand this explanation?"
Live Stream Room
"I think I understood, but I also think I didn't."
"My head feels a little itchy, like it's growing a brain, but it's not fully grown yet."
"I think I understand now. It's like blanching pork. The meat doesn't dissolve in water, but the blood inside the pork can be boiled out. Then you can pour out the boiled blood and get pork that doesn't have a fishy smell and tastes better, right?"
...
"If you insist on understanding it that way, then it's not impossible."
Now everyone understood much better; so that's how it is.
Li Sheng crushed the salt, dried it on tree leaves, and then ground it again into a fine powder. This made it into qualified salt.
He then put the fine salt in the sun to dry it, and he planned to make a sealed container for the salt using a bamboo tube.
Cut off a bamboo tube, then go up three sections from the top and make a lid to put all the salt into the bamboo tube for storage.
Despite all the effort put into making the salt, it only filled half a bamboo tube. However, this amount of salt would be more than enough for the two of them for a month. Once it was almost gone, they could continue making more.
Anyway, the seawater is inexhaustible.
Li Sheng spent most of the day refining salt, while Luo Zeng and Liu Nannan were still surrounded and tied up in their small shelter by six wolves. Although the wolves had stopped digging, they clearly wouldn't let the two go easily.
Are they really going to give up the competition?
No! No way! For two young people who love extreme sports, how could they give up so easily? They are people with both strength and courage, but they can't stay here forever.
Luo Zeng and Liu Nannan planned to fight their way out.
Luo Zeng: "Wolves won't attack so easily. I'll go out first and take down the alpha wolf if I get the chance. You take the arrows, wait for the right opportunity, climb the tree, and distract the other wolves."
If it were any other girl, she would probably have been terrified and cried long ago, let alone facing a pack of wolves. But Liu Nannan was not; instead, she seemed eager to try.
"Okay, I understand. Don't worry, you focus on dealing with the alpha wolf, and I'll take care of the rest."
After discussing it, the two decided on a plan. Luo Zeng slowly opened the door, and sure enough, all the wolves immediately surrounded him. Luo Zeng bent over and held a Swiss Army knife.
Luo Zeng was taller than the wolf and was carrying a weapon. The wolf did not attack rashly, but it also did not leave. There is no wolf that does not seek revenge. Luo Zeng spotted the wolf with the injured paw at a glance. The wolf's eyes seemed to have an extra murderous intent when it looked at him.
Liu Nannan also took the opportunity to come out, holding an arrow and a stick, and the two stood back to back, protecting each other.
Live Stream Room
"I'm so touched. Is this the kind of love where people trust each other and are willing to entrust their backs to one another?"
"The only couple in the group, they're a perfect match, I'm going to do everything I can to make them a couple."
"Don't kowtow yet, this is a critical moment."
"I just realized, in TV dramas, when the male lead is seriously injured and about to die, instead of calling 120 for emergency help, he's busy talking about love and writing long essays..."
"I thought this melodramatic soap opera was way too far-fetched, but I never imagined that art imitates life, and the lives of you guys."
"What time is it and you're still shipping couples...?"
...
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