The videos I watched became popular in ancient times

Chapter 104 Field Test
  After the live broadcast ends, it is destined to be a sleepless night for countless ancient people.

The reason is very simple. Tomorrow afternoon the anchor will announce the salt production process of snowflake salt.

The people who were most concerned about this matter were the emperors of each dynasty.

Once this technology is popularized, people all over the world will benefit from it and can eat high-quality and low-priced salt.

With more people eating salt, even if profits dropped, the court received far more salt tax than before.

The good thing of killing two birds with one stone is something that every emperor is happy to see.

Therefore, the next day, the emperors of various dynasties took action and asked the officials in charge of salt affairs to make preparations for recording. After the video of the salt-making process was played, they would record every step of the salt-making process in detail.

Not only the emperors of each dynasty, but also the ordinary people of each dynasty were also eagerly awaiting the arrival of the time.

Although they are ordinary people, they also want to know how snowflake salt is made.

Mastering a craft may come in handy later.

At two o'clock in the afternoon, Su Chen played the prepared video to the ancients on time.

[Know the following basic principles, and the salt you make will be purer and cheaper than others.

Salt can be divided into sea salt, well salt, lake salt, rock salt, etc. according to the source of production. The method of making salt is basically the same and very simple.

For large-scale production, it is recommended to mainly use sea salt. The specific method is to introduce seawater into the salt field.

The so-called salt field is a shallow pond that stores seawater. It is evaporated by sunlight and turns into brine. When it reaches a certain concentration, it precipitates and crystallizes. This is coarse salt. 】

Great Qin.

Ying Zheng: So that’s it. To make sea salt, you first need to build a large area of ​​​​salt fields. Later generations are really smart to come up with such an ingenious method.

Ying Zheng couldn't help but sigh with emotion. He finally understood why the cost of producing sea salt in Da Qin was so high.

Their method of making sea salt in Daqin is very expensive, that is, pour seawater into a large pot, then burn firewood and cook until it is dry to obtain coarse salt.

The common people of Qin Dynasty eat this kind of coarse salt, which is not only expensive but also tastes very bitter.

It takes a lot of firewood to boil a large pot of seawater, and what you get in the end is just a little coarse salt. This makes the cost of making salt from seawater high, and people spend a lot on salt.

Now, if we use the methods of later generations to build very large salt fields and use sunlight to dry the seawater in the salt fields to obtain coarse salt, we will not only get a lot of coarse salt, but the key is that the cost is extremely low.

In this way, as long as they build more salt fields, their people in Qin can eat low-priced coarse salt.

After getting the trick, Ying Zheng was ecstatic. Even if he didn't read the content behind the video, he benefited a lot from Yantian's whimsical idea.

Ming dynasty.

Zhu Di: Hey! This method of making salt in salt fields was only developed in my Ming Dynasty. I didn’t expect that it would be used in later generations.

When he saw that later generations were using salt fields to make salt, the corners of his mouth raised and he was extremely proud.

Later generations were far better than the Ming Dynasty. The usable salt production method was invented by the Ming Dynasty, which made him very proud.

In the dynasties before the Ming Dynasty, pots and stoves were used to boil seawater to produce coarse salt. It was not until the Yongle Dynasty that people began to abandon pots and stoves, build salt fields, and use the sun to obtain coarse salt.

[If you want to improve the quality of salt, you need to remove impurities and various harmful ions in seawater for purification. Take a small amount of fresh water and add the coarse salt prepared above to make it become saturated salt water. It is first precipitated and filtered, and then the filtrate of plant ash is added to remove excess calcium ions. It is then precipitated, filtered and re-exposed. Crystallization, the quality of the salt obtained in this way will be much better. 】

Big man.

Liu Che: I see. No wonder the coarse salt made from seawater tastes bitter. It took me a long time to make it. It turned out that it was because it was not purified and there were too many impurities in the coarse salt.

Liu Che had an expression of sudden realization on his face, and he didn't understand the underlying reason until today.

Coarse salt made from sea water is bitter and difficult to swallow. Only ordinary people eat this kind of coarse salt.

In the past, workers tried many methods to remove the bitterness from coarse salt, but they were all unsuccessful.

Today I finally found the source of the problem. It turns out that we need to use plant ash.

This is simple, there are plenty of plant ash, and the cost is negligible.

[If you have strong capital and a certain strength foundation, you can combine it with modern industrial purification methods.

A small amount of fresh water is also first added to the coarse salt prepared above to make it become saturated salt water. It is first precipitated and filtered, then hydrated lime is added, and then soda ash is added, and then purified through filtration and crystallization.

Hydrated lime is just quicklime and water is added. The method of making quicklime is as follows. Quicklime is also called burnt lime. Its main component is calcium oxide. The usual preparation method is to calcine natural rocks whose main component is calcium carbonate at high temperatures to generate carbon dioxide and calcium oxide. .

All natural salt rocks containing calcium carbonate, such as limestone and dolomitic limestone, can be used to produce lime.

In coastal areas, shells are used as raw materials and are burned into shell ash, which is used to make quicklime.

Under simple conditions, the method of making alkali from plant ash is recommended. Usually, plants contain a certain amount of potassium carbonate and soda ash. Burn the plants into ash to form plant ash, then put the plant ash into a cloth bag, and then rinse it with water to obtain lye. The lye here mainly contains soda ash and potassium carbonate, which have similar effects. 】

Datang.

Li Shimin: In other words, if you want to make snowflake salt, the key is to filter and purify quicklime and plant ash.

After understanding the core secret of snowflake salt, he was not carried away by joy.

Instead, he needs to test it again. Only after the snowflake salt is actually produced can he feel completely at ease.

Thinking of this, he immediately ordered the salt official next to him to prepare the materials and make them on site to see if they were the same as what was said in the video.

Everything was quickly prepared, including quicklime, plant ash, coarse salt made from boiled seawater, and some other tools.

The salt official followed the recorded steps step by step, dissolved the coarse salt, filtered it with a coarse cloth, then added hydrated lime and plant ash filtrate, then filtered it again, and burned it to dryness on a stove. Finally, there was a layer of fine white snowflake salt in the pot.

The quality of the prepared snowflake salt is much better than the coarse salt at the beginning. Not only is the color as white as snow, but the particles are as fine as the snowflake salt that is being snapped up in the live broadcast room.

When Li Shimin saw the final dried result, he was so excited that he dipped a little of it into his mouth with trembling hands.

The salty taste is very pure, without any bitterness, just like the snowflake salt sold in the live broadcast room.

Until this moment, Li Shimin showed a cheerful smile, feeling extremely happy in his heart.

He knew that from now on, his people in the Tang Dynasty would be able to afford high-quality and low-priced salt.

(End of this chapter)