Qiao Qi next to him hurriedly replaced it with an empty barrel.

The surrounding people were dumbfounded.

Oh my! Is it so magical?

Why did you pour a ladle of water into that cylinder and press it up and down so hard that water continued to flow out?

After pressing five or six buckets of water, enough to boil a pot of salt, Li Su stopped.

The surrounding people were all shocked by this magical pressurized water well.

Li Su smiled slightly, and taught Qiao Qi how to use the pressurized water well.

And then, it's time to start the real boiling of salt.

In the past, when they boiled salt, they first precipitated the well water naturally, and put the precipitated water into a pot and began to boil.

After the water has finally evaporated, all that remains is coarse salt.

However, because of the location of the salt well, the impurities contained in it are different.

And there are some impurities, which are also soluble in water.

By evaporation and crystallization, these impurities cannot be removed at all.

Therefore, in some places, because the salt wells contain less impurities and no toxins, the salt boiled from these salt wells can be eaten.

However, in some places, salt wells are rich in many toxic impurities, and the salt boiled from these salt wells is inedible.

And this large salt well is a salt well containing toxic substances.

Otherwise, it wouldn't be a barren beach by now.

And Li Su, as early as after the well water was beaten out, he had already used the system to detect what impurities it contained.

These impurities can be removed by adding barium carbonate and sodium hydroxide, that is, caustic soda.

And even the dosage, the system has calculated.

Next, Li Su handed over the barium carbonate and caustic soda purchased from the system in advance to Qiao Qi.

These barium carbonate and caustic soda are all divided one by one.

In each pot, add a packet of barium carbonate and a packet of caustic soda respectively.

That way, there's no need to worry about them counting the wrong portions.

In front of Qiao Qi, Li Su put a packet of barium carbonate and a packet of caustic soda into the pot.

Then let them wait for an hour, and after an hour, take out the liquid from the upper layer, and then you can boil.

An hour later, there was a lot of precipitation at the bottom of the well water.

Qiao Qi ordered someone to take out the liquid from the upper layer and put it into another pot, and then he could boil the salt.

In the past few days, the villagers who have divided the work to chop firewood have cut several large stacks of firewood.

Now boil salt, and some are used for firewood.

However, Li Su also knows that the efficiency of boiling salt is very low.

This large pot of salt will take about a whole day to cook.

Therefore, Li Su did not stare at the scene anymore, but turned around and went to rest.

On the second day, after Li Su got up and rushed to the scene, he found that the salt boiling work had come to an end.

After the salt is boiled, a thick layer of fine salt as white as snow suddenly appears at the bottom of the pot.

Seeing this salt, the people who boiled the salt couldn't help but be stunned.

Oh my!

Is this really the salt they boiled?

But how can it be so thin and so white?

The salt they used to eat was all large coarse salt.

And the color of these coarse salts, with a dull yellow tinge, tastes bitter and astringent.

The color and the salt they boiled at this time are simply heaven and earth!

At this time, Qiao Qi couldn't help but reach out and pinch a pinch of salt and put it in his mouth.

After eating, Qiao Qi was excited, and the corners of his eyes began to redden.

The surrounding villagers couldn't help but ask nervously, "Old Qiao, how does it taste?" ”

"Salty! It's salty! ”

Is it just salty?

Qiao Qi's words made these villagers dissatisfied.

This old Joe, half of the words are left and half is left.

The villagers who were boiling the salt couldn't help but stretch out their hands, pinch a pinch of salt, and put it in their mouths.

And then, their expressions were almost the same as Qiao Qi's.

The circles under his eyes were red with excitement, and he said in surprise: "Salty! It's salty! ”

No wonder, just now Qiao Qi only said salty, and didn't say anything else.

It turns out that this salt is really only salty.

It's not as bitter or astringent as they imagined.

In other words, the salt they boiled and the salt that the Governor gave them to heal were exactly the same?

It's not bitter at all, this salt is not poisonous salt at all, but the best refined salt!

This kind of salt has never appeared in Datang before.

Even among those families, they can't eat such delicate fine salt.

The family is only human, and the natural food is the best salt.

However, the salt they eat, even if it is of the highest quality, cannot filter out all the harmful impurities without chemicals.

The salt they cook will definitely sell for a good price!

Compared with their surprise, Li Su also went over to pinch a pinch of salt and tasted it, and couldn't help frowning.

The boiled salt still has a slight peculiar smell.

However, only later generations like Li Su can taste it.

For example, the people of Datang, who eat what kind of bitter and astringent coarse salt every day, can't pay for any peculiar smell at all.

Of course, even if it is a little peculiar, it is unique in Datang.

If Li Su is willing, he will definitely be able to sell it at a very high price.

In Datang, the price of salt, because it is a franchise, is extremely expensive.

The price of a pound of salt is ten times that of a pound of rice!

A bucket of rice costs 500 wen, and a bucket of salt costs 500 wen!

In Datang, a bucket is about 12 catties, so the price of salt per catty is about 52 Wen!

The price of a pound of salt is at least equivalent to more than 100 yuan in later generations!

From this price, you can see how black-hearted the family is!

If it weren't for the fact that although salt is a necessity, it is consumed in very small quantities, probably the people would not even be able to afford salt.

And this kind of refined salt boiled by Li Su, even if it is sold for 100 wen a catty, even if it is 200 wen a catty, there will be some rich people vying to grab it.

However, Li Su decided to greatly reduce the price of salt, and directly reduced the price of salt to 30 Wen.

Let the price of salt be reduced to a point where it is cheaper than the coarse salt sold at the market price.

When the time comes, Li Su wants to see how the Taiyuan royal family will take over.

If they don't cut prices, what will they use to compete with Li Su?

And if they reduce the price, even if it is reduced to 20 Wen, I am afraid that there will be many people who are willing to buy the refined salt that Li Su made.

And will not buy the salt in the hands of the Wang family.

And Li Su's cost of making these salts is actually very cheap.

In addition to the upfront investment, in fact, what Li Su needs to pay is nothing more than some labor costs.

But the daily wage of ten cents per person is simply not too cheap.

Even if each person can only cook an average of 20 catties of salt per day, and then remove their food expenses, the cost of each catty of salt is about a penny.