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In the current environment, if it is fine salt, it is absolutely fine to sell for three taels of silver per volume. If it is pure green salt, it can even sell for more than ten taels of silver per volume. Compared with the price of three to four hundred cents per volume of coarse salt, it is really a heaven and an underground. If the market monopolizes the market, the price can be higher.

I heard from the salt merchants in Jimo County that since the civil unrest broke out in Shaanxi, the supply of green salt has been intermittent, sometimes without any. The market has been out of stock for a long time. Some wealthy families have offered high-priced purchases of 300 cigarettes per kilogram. Unfortunately, there is still no stock. If a large number of refined salt appears at this time, the profit can be imagined. It is absolutely no problem to sell 100 cigarettes per kilogram.

After he said this, Zhang Zhun remembered that the coarse salt he used to brush his teeth every day was very difficult to feel. In the past, he focused on filling his stomach with hunger, but later he focused on the guards and had no chance to notice this. For wealthy families, it was really uncomfortable to use green salt to rinse their mouths, but suddenly the green salt disappeared.

Zhang Zhun said eagerly: "Prepare some things for me and I'll make some salt for you to see."

Yang Ruifeng hurriedly prepared.

No matter how dull his personality is, he clearly realizes that if he can really turn coarse salt into fine salt, the days of making a lot of money will come. In today's Shandong Province, and even in the Northern Zhili area, the demand for fine salt and green salt is a bottomless pit, which is not enough to fill in. It is not an exaggeration to say that it is a money tree, a treasure pot.

Soon, Yang Ruifeng prepared relevant utensils according to Zhang Zhun's requirements. He and Yang Gansheng were also on guard. Looking at their expressions, he knew that they were quite nervous. This is inevitable. The difference between refined salt and coarse salt is too big. If Zhang Zhu really could purify the coarse salt into refined salt, it would definitely make a fortune.

In fashionable terms, it is heaven and hell!

Zhang Zhun is naturally not as nervous as them. This is a foregone conclusion. If he did something wrong, it must be that the details were not done well, not that the method was wrong. When Yang Ruifeng was preparing the relevant utensils, he dug out his previous memories and carefully straightened out the context. Coarse salt purification is an experimental project that every student has done. Although he forgot many details, he still remembers the basic procedures.

There is obviously no distilled water and it is difficult to collect it, but the well water in Yangjiatun is still clear. Use a wooden basin to fill the well water and leave it quietly for a day to allow all the impurities to settle down. As long as the above part is above, the water source obtained is relatively clean, close to distilled water.

Filter paper can be replaced by cotton. Brand new cotton cloth is difficult to find. Poor families buy cotton cloth according to a ruler, so there is no excess cotton cloth at all. However, after careful cleaning of old cotton cloth, it can basically meet the requirements.

The basic operation of purifying coarse salt is to filter first and then evaporate, with the focus on removing impurities in coarse salt. Filtration needs to be repeated and all impurities should be removed as much as possible. Each time you filtration, a clean cotton cloth must be used. The work of cleaning the cotton cloth is still very cumbersome.

Zhang Zhun was only responsible for explaining. The specific operations were operated by the two brothers Yang Ruifeng and Yang Gansheng. Yang Kaide, Yang Yinghan and others were working on each other to see how coarse salt could turn into fine salt.

The experiment used an ordinary large pot for cooking salt. After careful cleaning, it was dried over and placed on the stove for later use. A filtered wooden barrel is also needed, and it is also washed and dried for later use.

Because it was the first test, the effect should be seen as soon as possible. Therefore, Zhang Zhun put about ten kilograms of "distilled water" into the bucket, and then continuously dissolved the coarse salt until it was saturated. The concentration of saturated salt water was about 36%, which means that there were at least three kilograms of refined salt in the bucket.

After the coarse salt is dissolved, seal the mouth of the bucket with layers of cotton cloth, then turn it over and let the salt water drop naturally until all the salt water drips. A lot of impurities are left on the cotton cloth, some are yellow and some are black, all the same. But this is not enough, and you have to filter it repeatedly until there are no more impurities on the clean cotton cloth.

Repeat the filtered brine, pour it into a large pot, cover it with a cotton cloth, boil it on the bottom, and evaporate the water completely. During this process, you need to constantly stir with a clean stick until the water is completely evaporated. Continue to stir to prevent the salt from condensing. After the water has completely evaporated, the white fine salt will basically come out.

"Have it!"

Zhang Zhun said happily.

The Yang family members were also quite happy.

If you look carefully at the purified sea salt, it is no longer granular, no longer yellow, but white powder. If you gently caress it with your hands, you can feel a very fine and refreshing feeling. Even if you don’t touch it with your hands, you can feel that it is much better than the original coarse salt. Yang Kaide and others have never seen real fine salt, but I think that fine salt should be almost like this.

"It's really salt."

Yang Ruifeng and Yan have been dealing with each other for half a lifetime, and naturally understand the difference between fine salt and coarse salt.

In Jimo County, he had seen the salt with his own eyes.

"What a salt!"

Yang Kaide also seemed very emotional.

The military households in Fushan Institute had cooked sea salt for hundreds of years, but they really didn't know that using this method to turn coarse salt into fine salt. If they had known such a purification method before, the elders and villagers in Yangjiatun would have long since no longer had to be as poor as they are now.

In fact, it is no wonder that the coarse salt was cooked by military households with great difficulty. After it was cooked, it was immediately filled and covered with cotton cloth, for fear that it would get wet and not be sold. Who would be willing to continue to dissolve the coarse salt in water, filter it over and over again, and then evaporate it again? It is this subtle difference in concept that leads to a very simple purification process that no one has discovered.

Zhang Zhun looked at everyone present, who had the closest relationship with him. He nodded thoughtfully and said in a low voice: "Uncle Yang, we can only know this method ourselves. If we learn it by others, the whole Shandong will be salty and the price will not be affordable."

Yang Kaide naturally understood the power of it and said to his family: "You have heard Yulin's words? No one is allowed to reveal this way to get salt!"

Everyone nodded.

Yang Ruifeng collected all the fine salt in the pot and weighed it, which was exactly three pounds. He packed the three pounds of fine salt in a special bag and said excitedly: "I'll go to Jimo County now to see how much this fine salt can cost."

Zhang Zhun nodded and said, "Be careful on the road."

Yang Ruifeng agreed and hurriedly set off with the hope of the whole family.

He carried the fine salt behind him in a cloth bag, but it was not visible. I believe the salt owl would not notice him. As long as he was careful on the road, there should be no problem. He had been to Jimo County many times.

The Yang family was nervous but could not suppress their inner excitement. They continued to dissolve more coarse salt repeatedly, filter, evaporate, and then carefully packed the purified fine salt. It doesn’t matter if the coarse salt was wasted in the past, fine salt cannot be wasted. Any handful may be worth a penny!

With hope, the Yang family seemed very excited. While busy purifying the refined salt, they were waiting for Yang Ruifeng to come back. On this night, the whole family did not go to bed very late. It was not until after midnight that the last pot of refined salt was purified, and everyone reluctantly went to bed.

Only Zhang Zhun himself, what should he do or what to continue to do.

By noon the next day, Yang Ruifeng came back.

"Good news!"

"Sold for a good price!"

After Yang Ruifeng entered the house, he immediately said excitedly.

After he brought three kilograms of fine salt with him to Jimo County, he went to several salt merchants in succession to ask about the price of fine salt. In the end, a salt merchant offered the highest price, 155 cents per kilogram. So the three kilograms of fine salt he brought were sold for 465 cents, which was equivalent to the price of 100 kilograms of coarse salt. The salt merchant also said that no matter how many fine salt Yang Ruifeng had, he bought it at this price.

For safety reasons, Yang Ruifeng did not reveal much information and came back hurriedly overnight. On the way back, he was almost running because his feet were so excited that he seemed to be stepping on cotton balls. Yangjiatun is hundreds of miles away from Jimo County. Yang Ruifeng ran for a day and a night, but he didn't feel tired at all. The only thing he regretted was that he only brought three kilograms of fine salt. If he carried twenty or thirty kilograms, the trip would not be in vain.

"One hundred and fifty-five words!"

The Yang family's eyes were shiny.

The coarse salt used to be sold for up to five cents per pound!

The price of fine salt is thirty-one times that of coarse salt!

This price difference is really too big!

It's really unimaginable!

Huge profits, absolutely huge profits!

Thirty times huge profits!

Zhang Zhun didn't know much about the price of private salt, and didn't know whether the price was high or low. However, 155 cents is no match for the price of three or four cents per pound of coarse salt before. The price difference of more than one hundred cents! In the future, the Yang family would only be responsible for purifying refined salt and earning the difference in the middle.

To celebrate, when Yang Ruifeng came back from Jimo County, he specially bought five kilograms of pork and some other common food ingredients. The price of each kilogram of pork was 50 cents. In the past, it took at least ten kilograms of coarse salt to buy one kilogram of pork. Now the price of one kilogram of fine salt is enough to buy three kilograms of pork. Yang Ruifeng bought pork this time and felt very comfortable. The last time the Yang family ate pork, it seemed that during the Chinese New Year, everyone still had oil residue.

"Mom, don't fry this pork!" Yang Ruifeng said.

"I understand." Huang was also very happy.

She hadn't eaten the authentic pork for a long time.

"Eat white rice for lunch!" Yang Ruifeng said again.

"Okay! Pure white rice!" Huang replied happily.

[Brothers, vote for more recommendations! Thank you for your support~~~~]
Chapter completed!