Salt has always been a profiteering thing in ancient times, and in most cases the right to sell it was in the hands of the imperial court.

Such a profiteering commodity related to people's livelihood has given birth to batches of salt merchants who are rich and rival the country, and of course, it has also created endless illegal salt dealers.

If Zhao Hengyi and Zhang Qicheng brought up such a topic before the barbarians were rampant, they would inevitably be driven out of the door by this Jiangling Mansion Yin.

But for now...... Friends chatting with each other to increase their knowledge, who else can commit a taboo?

"Lord Zhang seems to be interested, it just so happens that Zhao came to Jiangling City this time to bring some mineral salt, why don't you demonstrate it on the spot, Lord Zhang, you should have fun!"

"The lord said so, this official is really strange! It is really unexpected that there is such a miraculous means in the world! ”

Zhang Qicheng found a small secluded courtyard and prepared the utensils needed by Zhao Hengyi, leaving only the henchman he sent to Yushuwan to report the news.

Zhao Hengyi took out the mineral salt he specially brought with him, which was a large piece, which was deliberately selected.

This kind of trick-like method transforms the mineral salt that people will be poisoned by eating it into good green salt, Song Yingan has seen it before, and it is just time to help out.

A man from Cangwu County, a former Yang Bo, knocked the huge piece of mineral salt into small pieces, and then stuffed it into the prepared stone mill eye, and as the stone mill turned, brown salt powder slowly scattered from the edge of the stone mill.

In Zhang Qicheng's view, such a brown powder cannot be called salt at all, this is completely mineral powder, and from such a thing is extracted from the salt that people can eat...... Zhang Qicheng didn't have much hope.

The brown salt powder was poured into a large wooden barrel by Zhao Hengyi, and the water was poured and stirred thoroughly until the water in the wooden barrel was completely saturated.

The saturated brine was poured into another empty bucket covered with two layers of linen cloth in advance, and as the brine slowly seeped down, a large amount of slag impurities remained on the two layers of linen.

Removing the sackcloth and looking at the water in the new bucket, although it was still muddy, it was much clearer than the brown it had just been.

The water was then poured into an empty bucket covered with four layers of linen, and after being filtered again, the water had turned a pale red.

Zhao Hengyi didn't plan to explain the principle clearly, the methods and procedures for extracting edible salt from mineral salt are not complicated, you can copy it after reading it once, you can make salt, what kind of chemistry did the ancients learn.

At this time, the light red solution has been considered to have filtered the impurities quite cleanly, and the next step is the most critical step in the whole salt production process, detoxification.

A lot of fine charcoal was finely crushed by Zhao Hengyi, and then these charcoal grains were tightly wrapped in four layers of linen, and finally these things were put into a big funnel.

After confirming that the burlap bag had blocked the exit of the funnel, Zhao Hengyi placed the funnel on the prepared wooden shelf, and then poured the pale red solution into the funnel.

But after a while, a pale cyan liquid flowed out from under the funnel, dripping into the empty wooden barrel prepared in advance, Zhao Hengyi casually dipped a little liquid in his mouth and tasted it, yes, there was no other strange smell except for saltiness.

At this time, Zhang Qicheng was already moving.

This Master Zhang is not a nerd who is dead reading, the turbid liquid that was full of impurities and slag at the beginning, after this process, turned into a clear liquid, which seemed to him to be an unbelievable method.

Following Zhao Hengyi's example, he dipped his finger in a little liquid leaking from under the funnel, put it in his mouth and tasted it...... Salty!

When all the clear liquid flowed clean, Zhao Hengyi put the liquid into a large cauldron, and then lit a fire and burned it.

As the pot continues to boil, the water in the pot slowly evaporates, and finally only a thick layer of cyan hard shell is left!

Zhang Qicheng was not afraid of hot hands, so he rushed forward, broke off a small cyan hard lump, stuffed it directly into his mouth, and then immediately squeezed his eyebrows and made his eyes without official authority!

But even so, Zhang Qicheng was reluctant to spit out the piece of green salt in his mouth!

This is the best green salt, this thing is not used for food at all, this is something that only rich and noble families can use, wake up every morning, dip the wicker in this kind of green salt and rub the teeth finely...... This meow is for purifying the mouth!

This kind of green salt is sold for at least 500 wen a pound in Jiangling City, and Zhang Qicheng is reluctant to use it for cooking anyway!

The mineral salt was weighed before it was melted into the water by Zhao Hengyi, it was exactly ten catties, and the green salt in the pot was two and a half catties!

In other words, worthless toxic mineral salt, after processing, can obtain a quarter of its own weight of the best green salt!

The reserves of mineral salt in Daqing Mountain are amazing, according to Zhao Hengyi, that is, the entire people of Dangyang County go to dig, and they may not be able to dig out for a lifetime!

Where is the mineral salt, it is obviously a treasure, a huge cornucopia!

In the end, he couldn't get through his sense of taste, Zhang Qicheng still spit out a piece of green salt, this Lord Zhang didn't care about rinsing his mouth, but closed his eyes and fell into contemplation.

The benefits contained in this are too great, Zhang Qicheng is just a Jiangling Mansion Yin, and he is worried that he is not qualified to be Zhao Hengyi's partner.

After seeing this magical process of making green salt, and after learning that there are immeasurable mineral salts in Daqing Mountain, Zhang Qicheng understood that he had been pulled onto the boat by Zhao Hengyi!

This ship will certainly bring unimaginable wealth, but it will also inevitably come with irresistible risks!

"Sir's method is really magical, I heard that His Royal Highness King Qi likes such fun and interesting things the most, isn't it ......?"

"Master Zhang and I want to be together!"

At this time, Zhao Hengyi did not reject cooperating with King Qi, "It's just that although this method is somewhat interesting, it is difficult to get into the elegant hall after all, and rashly invite His Royal Highness King Qi to watch, I'm afraid it will offend him!"

However, the quality of this green salt is not bad, and His Royal Highness King Qi can help find some sales. ”

This is Zhao Hengyi's bright attitude, King Qi can participate in the sale of illicit salt, and he can share in this huge treasure, but the origin of this treasure and the method of making salt cannot be known to King Qi!

Anyway, the waterways of Jiangling Mansion extend in all directions, and it is extremely easy to transport goods, so as long as the population in charge of transporting green salt is tight enough, then even if King Qi participates in all the processes of selling it next, he will only think that these green salts come from the salt farms that are guarded and stolen!

"Sir, you really think things through, but I'm the only one ......"

"Lord Zhang, don't panic, there is a caravan at the county lord's house."