Space Food Storage: Daily Travel

The sources of table salt include sea salt, well salt, mineral salt, lake salt, and soil salt.

Salt wells are mainly found in inland areas. Brine with high salt content is taken from the wells, and the water is evaporated by steaming to obtain salt.

In coastal areas of my country, solar salt production is done using seawater. Seawater is introduced into salt pans, where it is evaporated and concentrated using sunlight and wind power until it reaches saturation. The salt is then naturally precipitated and harvested. This method is known in chemistry as evaporative crystallization.

The salt consumed in ancient times was naturally coarse salt, slightly bitter and astringent.

The harms of eating coarse salt for a long time mainly include increasing the risk of high blood pressure, increasing the probability of kidney stones, and causing damage to gastrointestinal health. Eating coarse salt for a long time can easily cause iodine deficiency.

Generally speaking, the 10 signs of iodine deficiency in the body may be fatigue, cough, difficulty swallowing, hoarseness, shortness of breath, thickening of the neck, chills, hair loss, thin body, and decreased intelligence.

In modern times, salt is widely available and affordable. However, in ancient times, salt was the foundation of a nation and the basis of its prosperity.

In order to safeguard the interests of the country, the government will never allow the people to resell "private salt".

Salt is so important because it is a substance that the human body needs to maintain health. Ancient people believed that if people do not eat salt for a long time, they will feel weak.

In ancient times, people's main consumption was buying food, and salt and grain were inextricably linked. Controlling the salt industry was equivalent to controlling the entire agricultural trade.

Salt is consumed by a large number of people, and almost everyone needs it. People are not sensitive to the price of salt. A salt tax is the ideal means of taxation, and the government can achieve this by controlling the price of salt.

In ancient times, salt tax was the country's main source of fiscal revenue. Emperors of all dynasties attached great importance to the salt industry, and the state firmly controlled the salt industry.

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Liu Yuhan informed several adults that she wanted to try to extract crude salt.

Some adults were a little surprised to hear that salt could be made into small and white particles.

They have been growing up eating coarse salt. If they think it is too big, they will use the back of a knife to break it into smaller pieces. They try to use less salt. After all, salt is sometimes hard to buy. Not only is it expensive, but there are also purchase restrictions in some places.

Liu Yuhan poured about 10 kilograms of coarse salt from the Liu family into a clean wooden basin filled with water and let it dissolve naturally. He added more water.

The next step is to filter the completely dissolved brine.

Take a clean cotton cloth, place it in the dustpan you usually use to hold vegetables, and slowly pour the dissolved salt water into it to remove impurities and suspended matter.

The third step is evaporation. Pour the filtered brine into a large pot and heat it to evaporate it. During this process, the salt will gradually concentrate, leaving pure salt. This step is relatively time-consuming and fuel-intensive.

It is OK to evaporate and leave a very concentrated brine. You can try it and the concentrated brine is very salty.

The final step is to wait for crystallization. Let the concentrated brine sit for a while to allow the salt crystals to settle. If you're eager to use it immediately, heat it over low heat, stirring gently or heating it to promote the crystallization process.

Liu Yuhan was heating over low heat to promote the crystallization of the salt.

It should be noted that this method can only remove some simple impurities. For crude salt containing more soluble impurities, more complex purification methods such as ion exchange and reverse osmosis are required.

Although Liu Yuhan's operation is simple, it can greatly improve and change the coarse salt in this dynasty, which is amazing.

The fine white salt has a slightly yellowish color, and when you taste it, it has less bitterness.

The adults watching were stunned when they saw this. Like magic, the yellow coarse salt turned white and fine, and tasted even better.

Mr. and Mrs. Liu's understanding of their granddaughter has reached a new level.

They felt a little complicated. If this method of purifying crude salt were to be released to the public, they didn't know how much of a sensation it would cause, and how much profit it would generate, attracting many people to scramble for it.

"Xiaohan, have you ever told anyone about the method of purifying crude salt?"

"Grandfather, I haven't mentioned it before. This is my first time trying it. Uh, it was because I made a tofu brine recipe before that I had this idea. I want to try to purify the salt. Is there anything wrong with it?"

"Grandfather is just asking you. It's best not to mention it to anyone else. You're a little girl. You can't tell anyone about this method, okay?"

"Xiao Han, your grandfather also wants to protect you. Think about it, if this method of extracting crude salt is released, how many people will scramble for it? Money can move people's hearts, so it's best for you to pretend you don't know."

"Grandpa and Grandma, I understand what you mean. I won't tell anyone. As for the recipe for purifying crude salt, you can do whatever you want with it. I'd be even happier if I could help you."

"Are you willing to hand over this recipe?"

"Of course this is your recipe. Mother's wish is also my wish. If you can immediately leave the island, that would be great."

"What are you talking about, kid? We've never thought about this. With the court still in chaos, it's a blessing for us to survive on this island."

"Father and Mother, what Xiaohan said makes sense. My two brothers, as well as Xiaohong, Xiaoqing, and Xiaozhi, shouldn't be forgotten like this..."

"Alas, it's my fault that I have implicated you..." Liu Zhiyuan sighed heavily.

"Father, that's not what I meant. It's just that you have to try a lot of things, right? Only by trying them will you not regret it."

"Zhiyuan, just listen to what your granddaughter and great-granddaughter say. We are old, but the children's lives can't continue like this. They will eventually have to leave this island. It's okay for us to suffer in our old age, but we can't let them suffer like this with us. They deserve to have their own lives..."

"Mother...Okay, I'll listen to you and the children. I'll seriously consider what to do. Don't worry."

"Oh, that's right. We have to give it a try. Even if we fail, it won't be that bad for us."

Liu Zhijian, Liu Zhiyi and Liu Hong stood beside them with their fists slightly clenched and their expressions solemn.

Can they really leave the island? Can their Liu family avoid being annihilated?