According to the record of "Tiangong Kaiwu" compiled by Song Yingxing, a beginner in the Ming Dynasty, the salt drying method originated from the salt people near Jieshi Mountain in Wuli County, Shandong Province in later generations. As for the era in which this method of salt making originated, it is impossible to test the specifics, perhaps in the early Ming Dynasty, or in the Song Dynasty, but it is impossible to be before the Sui and Tang dynasties.

What Zhuge Liang has taken out now is the method of drying salt in later generations.

Drying salt, as long as you know the principle, is very simple.

On the right seaside, build a few pools, and you can build a saltworks.

As for where to set up a salt drying plant?

Almost all seashores where salt can be boiled can be built, as long as the nearby sea water is not turbid.

After these pools are built, the row of pools in front of them is filled with seawater, and the natural wind and sunlight evaporate, as long as it is not the season of rain and snow, the seawater in these pools becomes a saturated salt solution for three to five days.

These saturated salt solutions are then drained into a second row of pools.

At this time, the first row of evaporation ponds can continue to introduce seawater for evaporation.

This second row of pools is the crystallization pool.

In the crystallization pool, the saturated salt solution continues to evaporate, and the salt crystals will slowly precipitate.

These table salt crystals, according to later generations, are coarse salt, and they also need to be crushed into fine particles, and iodine added. But in this era, even the people have no coarse salt to eat, and Zhuge Liang can't ask for iodized salt.

When the salt crystals in the crystallization pond have accumulated to a certain extent, the coarse salt can be collected and transferred to other places to dry. After all, these salt crystals also contain water, and you need to continue to remove the water in them.

In fact, the seawater in the crystallization pool does not need to be dried.

This is because seawater also contains other toxic substances, such as magnesium chloride and so on.

Of course, magnesium chloride is also salt, which tastes similar to table salt, but is poisonous. In this era, the boiled salt naturally contains magnesium chloride, but for the majority of people who lack salt, it is actually nothing.

However, the salt drying method can remove these toxic substances from the seawater.

After a certain amount of salt crystallization is precipitated from the seawater in the crystallization pond, the remaining seawater is directly discharged and returned to the sea.

In the drying of salt, the first precipitation in seawater is sodium chloride, that is, table salt, followed by toxic substances such as magnesium chloride.

As long as the remaining seawater solution is drained before the salt is completely crystallized and precipitated, the probability of containing toxic substances such as magnesium chloride in the salt is extremely low.

As for how to grasp the degree, the data of later generations is not universal in this era, but it can be slowly salted.

Zhuge Liang didn't know the process of drying salt in later generations, but he still knew this principle. In other words, as long as you learn junior high school chemistry in later generations, it seems impossible that you don't know how to dry salt, right?

……

Knowing the basic principle of the salt drying method, Sun Quan was very excited.

With Sun Quan's ingenuity, he could calculate in an instant that drying salt was more efficient than boiling salt.

How many catties of salt can a salt worker cook in a day? However, to dry salt, only three or five salt workers are needed in one acre of salt farm, and if there are three or five days of wind and sunshine, hundreds of catties of salt can be dried! This is much more efficient than boiling salt, and it doesn't need firewood.

As for the weather?

As long as half of the year is sunny, he Sun Quan will be able to make money.

"Now that we know the method of drying salt, we can completely get rid of Zhuge Kongming and go it alone, why do we have to sell millions of stone salt to Liu Bei at cost price every year?" After Sun Quan was excited, his eyes were lowered, but he was thinking about the possibility of repaying the debt.

The effect of drying salt is extremely high, so the cost of salt will naturally drop to a very low level, and it is not impossible to even drop it to three or five cents a catty. At such a cost price, selling millions of stone salt to Liu Bei every year, Sun Quan felt panicked no matter how he calculated.

It must be known that the current market price of salt is basically about 150 yuan a catty.

This is still the price of salt in Koto!

In Hanzhong, or Xiliang and other places, it is normal for the price of salt to increase several times, and even many times there is no market.

"Wu Hou already knows the method of drying salt, so under the conditions just proposed, is Wu Hou ready to travel, or is he ready to ignore it?" Looking at Sun Quan's lowered eyes, Zhuge Liang knew what this gang was thinking about.

In his previous life, Zhuge Liang had confessed to Sun Quan and knew the temperament of this guy.

Turning his face and not recognizing people, stabbing him in the back, this is what Sun Quan can do.

In other words, if Hanzhong was adjacent to the sea, Zhuge Liang would not have to ask Sun Quan for salt at all.

He could have dried salt on his own turf.

The problem is that Hanzhong is located inland, and it is useless for Zhuge Liang to have a salt drying method.

If he wanted salt, Zhuge Liang could only use the method of drying salt to exchange it with a certain prince.

And in today's world, it seems that there are still many princes, but there are only a few of them adjacent to the sea.

Needless to say, the Jiaozhou Shijia is not only far away, but also the traffic is extremely inconvenient, even if the Jiaozhou Shijia does not need money to supply Uncle Liu Huang with salt every year, Zhuge Liang does not dare to ask for it!

Transporting a stone of salt from Jiaozhou to Hanzhong, sand can be turned into the price of gold!

Needless to say, Yuan Shao in Jizhou, the battle of Guandu is underway, and it will be when he is defeated, even if Zhuge Liang gives Yuan Shao the method of drying salt, how many days can Yuan Shao support? And how many stones of salt can you support Uncle Liu?

What's more, between Jizhou and Hanzhong, there is still a Cao Cao, and the salt from Jizhou basically cannot be transported to Hanzhong!

As for exchanging salt with Cao Cao for salt, are you sure that this is not an enemy?

Cao Cao is now powerful enough, and he will soon become the biggest prince in the world, if he is allowed to control the salt again, who in the world can still resist him? Even if the remaining princes are united, they can't bear Boss Cao at that time, right?

Moreover, Zhuge Liang estimated that he was afraid that Cao Cao's front foot had obtained the method of drying salt, and his back foot would pit Han Zhong.

In comparison, cooperating with Sun Quan is the last choice.

Anyway, Zhuge Liang has the memory of the original owner's previous life and knows Sun Quan's urine.

Perhaps, it is not surprising that Sun Quan will turn his face with Hanzhong in the future, and even directly tear up the agreement made today, but at present, at least within three or five years, Hanzhong can get enough salt from Jiangdong!

As for saying that in the future, Sun Quan will turn his face or tear up the agreement, and he will talk about it then.

Now, Zhuge Liang only needs to see if Sun Quan will keep his promise now.

According to what Zhuge Liang said just now, as long as he said a new method of salt production, Sun Quan needed to promise to deliver millions of stone of salt to Hanzhong at cost price every year. Of course, Sun Quan did not express his position at that time.

Now, Zhuge Liang is waiting for Sun Quan to make a statement! Please pay attention to the latest chapters in the future