Wang Li's movements were very fast, and it didn't take long for him to get inedible salt.

Zhao Si looked at the stone in Wang Li's hand and fell silent.

"I'll let you bring the salt." Zhao Si said.

"yes, isn't it inedible salt?" Wang Li's face was full of doubts.

What he brought was inedible salt, and the stones and salt crystals were mixed together, or they were simply salt stones licked by animals in the mountains.

"What's the problem?" The king asked.

"It's inedible salt, but is it possible that it's a stone and not salt?" Zhao Si asked.

"Brother, this is salt!" Jing whispered to the side.

Zhao Si was stunned for a moment, and his face was full of doubts: "Can this be called salt?" ”

It's clearly a stone!

"I'm talking about that kind of mess, black mess......" Zhao Si gestured.

Salt salt and salt crystals with more primitive impurities are what Zhao Si wants.

"That salt can be eaten, this salt can't be eaten, the general is not wrong." Jing nodded as a matter of course.

"You'll get poisoned if you eat it!" Zhao Si said seriously.

"If you don't eat it, you don't have salt to eat." Jing replied.

"It's not that this salt stone can't be eaten, in the past, the family really couldn't afford salt, so they would follow the back of the animal's butt to the mountains to find salt stones, and the taste was salty when licking, but they couldn't bite it." Jing Kai recalled.

Salt is a rarity in this era, and there is no salt that cannot be eaten.

If you bite and swallow, you can eat it, as for eating burps, it is a minority, even if the heavy metals exceed the standard, to be honest, you will not die if you eat it, and in most cases, you will accumulate some chronic diseases because of the accumulation of heavy metals.

Unless it is seriously exceeded, it will die directly after eating.

If you really die violently, it's a bad fate, and the main thing is to rely on luck.

Zhao Si fell silent...... According to Jing and Wang Li's logic, there is really nothing wrong with it.

"Then there must be no shortage of good salt." Zhao Si teased.

Wang Li immediately smiled and said that Zhao Si was right.

"There is a lot of salt in Qidi, and most of the salt mines are in Qidi, but the salt of Qidi is only a little cheaper than well salt." The king departed.

"That is, there are no more natural salt farms by the sea. If you can boil the sea into salt, you can't eat the dead. Moreover, the cost of boiling the sea into salt is too high. ”

At present, the situation of salt in the inland areas is generally like this, the dead who eat it do not sell, and the people who eat the undead continue to sell, and the stones and eggs in it are picked up by breaking through the sky, and maybe the ones sold to the nobles are just sifted through a sieve a few times.

As for the salt of Qidi, it is better to win the sea salt, the heavy metals will not exceed the standard, and it is boiled into salt, the cost is quite high, and the price has been high.

Zhao Si didn't continue to dwell on this issue with them, people in this era are too optimistic.

If you can't eat and die, you have a chronic disease, and blame yourself for not being in good health.

Blame yourself for your bad life after eating death.

Well......

Zhao Si already had some specific guesses about the salt circulating in the market in this era.

Among them, the most high-end and high-quality should be well salt.

Well salt is generally pure in texture, less impurities, and pure in taste.

The second is Qidi sea salt.

Then there's the salt mines in the hinterland.

There are many natural salt mines, and there are also many natural salt farms by the sea.

Then according to the division of eating to death and eating to death, the salt mine that eats to death is a waste mine.

If you can't eat it, it's a good salt mine.

Maybe how long you eat is also a measure of your body, after all, the amount of salt impurities in each place is definitely different.

After a long period of development, most of the edible and pure salt producing areas have basically been surrounded by local forces. The salt of this era also has a certain grade.

Of course, there must be black-hearted salt merchants who continue to sell salt with heavy metals that cannot be sold, good salt and bad salt are mixed together, as long as you can't eat it and the price is cheap enough, someone will always buy this thing.

Naturally occurring salt is rarely free of heavy metals, many of which cannot be filtered out by simple filtration methods such as sieves, so most salt mines have a fatal effect on the body.

Even though the quality of the salt sold in this era is already very poor, it is actually in short supply.

Most people can't afford salt, so naturally they have their own life hacks.

When the cattle and sheep are put on the mountain, the livestock will find salt and lick it by themselves.

Even if it is a salt stone that cannot be gnawed, it contains a certain amount of salt, and even many families still retain the habit of using boiled salt stones for seasoning.

"Find those salt mines that are easy to get sick and easy ......to die after eating," Zhao Si sighed and said.

According to Wang Li and Jing, I am afraid that these salt mines that are easy to get sick and easy to die are also eating at the risk of their lives.

They can't even eat salt, and if you tell them it's poisonous, they won't listen.

In a few moments, Wang Li brought another pile of salt with an almost black texture.

"That's it!" The king left his mouth and said.

Zhao Si sniffed it, it didn't feel like salt, and carefully sipped a little on the tip of his tongue.

The taste is called a colorful one, except for the salt taste.

Bitter, astringent, and mudy, with a bit of metallic flavor in it.

"Get some cloth."

Zhao Si asked Wang Li to get charcoal, and then find some weeds and reeds that were messy, and ignited a bonfire, which was natural grass ash after it was burned through.

Grass ash, charcoal!

Natural adsorption filtration and purification artifact!

The brine salt is smashed, mixed into the water, mixed with plant ash, and then wrapped and filtered with silk to filter out the impurities that are insoluble in the water first.

Repeat it a few times, and there are basically not too many impurities that can be seen clearly by the naked eye, and there are messy things such as charcoal to absorb pigments.

Finally, wait for the quality of the brine to become similar, and then the salt crystals can be directly evaporated.

I didn't have time to wait for the sun to dry out the salt, so I put it directly into the ding to cook, and the blue-gray salt crystals appeared.

"Green salt!" Wang Li looked at the final crystallization, felt quite magical, and circled around Xiaoding for a long time.

This is clearly made out of the black brine.

From the brine that can eat the dead, to the best green salt?

Wang Li was a little confused.

The whole step was filled with things he couldn't understand.

Didn't it turn into water? And the ashes were mixed in it, and the charcoal was added.

Why did it boil it out again?

Zhao Si probably compared, and the salt yield was a bit low. Only a third of it came out.

That is to say, in addition to the loss caused by filtration and purification, the impurities in this piece of brine salt are likely to exceed one-half!

This is not a salt crystal at all, but a mixed crystal of salt with other heavy metals and even mud and stones.

"Can you eat it?" Wang Li looked at the thin layer of opening doorways in the small ding in front of him.

"Naturally, you can eat it!"

Without thinking, Jing took some out of the ding and put it in his mouth.

Jing never questioned their captain.

Of course, the main reason is the lack of salt when going to sea, and Zhao Si boiled salt in this way.

Jing vaguely remembered that everyone was shocked at that time.

"Naturally, you can eat it!" Zhao Si smiled and spoke.

Are there any other heavy metals in there? Absolutely.

With such a rudimentary filtration method, how can it be possible to completely remove heavy metals?

It's just that for this era, after experiencing the double filtration of grass, wood, ash and charcoal, it is basically impossible to eat dead people, and basically there will be no particularly serious diseases.

Of course, if you want to continue purification, you can use the saturation crystallization method.

This is simple, and junior high school chemistry is taught.