Farmer's wife: My husband came back and the house was in chaos

The work of purchasing crayfish is in full swing. People catching crayfish can be seen everywhere in the fields and rivers of the village.

When Yao Qingnian returned to the city, the owner of Yunlai Restaurant sent someone to tell her that the saltpeter was ready: "Miss Yao, when can we start making ice?"

"Where is the saltpeter? I'll go over and try it."

She put down the work in her hands. Since she had agreed, she decided to give it a try. Making ice cubes was not difficult. Yao Qingnian had done it before.

However, modern saltpeter is somewhat different from ancient saltpeter. Today's saltpeter is refined and has a high purity, while ancient saltpeter had to go through some processing before it could be used.

"It's in the other courtyard! I'll take you there."

Yao Qingnian was brought by A Ming to the courtyard where saltpeter was stored. It was a two-story courtyard, cleaned tidyly and fully equipped with living furniture, but it did not look like anyone lived there.

Amin took her to the warehouse where a lot of prepared saltpeter was piled up.

"So much saltpeter, amazing!"

"Ms. Yao, our employer has bought this yard. You are free to use anything inside and no one will disturb you. Just tell me if you need anything or if you lack anything!" Amin said politely.

"Your boss is really thoughtful. Please help me prepare some things." Yao Qingnian listed a series of things he needed and asked A Ming to help get them.

"Okay, Miss Yao, I'll go get ready first."

Before making ice cubes, you need to purify the saltpeter first, so that the chance of successful production will be greatly increased.

Yao Qingnian first dissolved saltpeter in water to allow the particles to settle to the bottom. After standing for a period of time, he took the upper clear liquid and filtered out the impurities. Then, he poured the filtered liquid into an iron pot and boiled it to obtain pure saltpeter.

After more than a day of refining, we finally obtained saltpeter powder with a higher purity.

It should be noted that saltpeter cannot be eaten because potassium nitrate can cause a type of cancer.

Yao Qingnian started making ice cubes and found a large vat, a closed bucket, and cold well water.

The shopkeeper came over specially to see how Yao Qingnian made ice cubes. The boss ordered that he should fully support Yao Qingnian. If the ice cubes were made successfully, it would be a great achievement.

She took the bucket out from the space, then added water into the bucket, sealed it, put it into the big vat, and then poured an appropriate amount of well water into the big vat.

Then slowly add saltpeter into the large vat. The saltpeter will react with the water and absorb heat. As the reaction proceeds, just wait for the water in the bucket to gradually freeze.

Several people stared at the bucket in the big vat. The bucket was transparent, and it was the bottle of water commonly used at home. After waiting for a while, there was no change.

Could it be that there wasn't enough saltpeter? Yao Qingnian added some saltpeter powder and stirred it.

"Miss Yao, can this really make ice?"

There has been no change for so long that the shopkeeper has become a little suspicious.

"You can't eat hot tofu in a hurry, wait a little longer."

Several people stared at the vat with their eyes wide open, sweat dripping down their cheeks. No one dared to make a sound, and the air seemed to have stopped flowing. As time passed, Yao Qingnian took the bucket out of the vat.

The water taken out is called supercooled water, which is liquid water with a temperature below zero degrees Celsius. As long as it is slightly shaken, it will immediately freeze into ice particles.

"It's time to witness the miracle!"

Find a large basin and pour out the water in the bucket. The water instantly freezes into ice cubes.

"It's ice! Really ice!" The shopkeeper looked at the ice cubes made in front of him excitedly, his eyes widened, and he poked it gently with his hand. It was icy cold and his eyes were full of disbelief.

Yao Qingnian took some ice cubes and put them into the milk tea she brought with her, then handed it to the shopkeeper.

The shopkeeper took a sip and said, "Yes! This is the taste. Miss Yao, you are amazing! I never dared to dream that ice cubes could really be made. Where did you learn this method?"

The ice was made successfully, and the shopkeeper was so excited that he jumped up and down like a monkey. He touched the ice cubes and drank milk tea from time to time. His eyes were full of satisfaction, and he admired Yao Qingnian even more.

"I read this in an ancient book. Saltpeter added to water will quickly absorb the heat, and as the temperature slowly drops, it will freeze into ice. And this water is not made from ordinary water. Just like the deep well water I used just now, it has a low temperature, so it is easier to make ice successfully."

The shopkeeper nodded and said, "Miss Yao is very smart. I admire you. Do you know how much profit you can get if you tell others about this method of making ice? Now that you have told me, aren't you afraid that I will sell it?"

"This method of making ice was not invented by me. We are in a cooperative relationship. I am doing you a favor. You can use it however you want!"

"We at Yunlai Restaurant will always remember this kindness from the young lady!" The shopkeeper quickly passed the method of making ice cubes back to the capital.

After successfully making ice, Yao Qingnian said goodbye and returned to the shop. The owner of Yunlai Restaurant had someone deliver last month's dividends from braised food, which amounted to more than two hundred taels. This was much faster than the money he had earned from setting up his own stall before.

"Your Highness! Your Highness! There's news from Anding County!" When his subordinates came to report, Prince Jing was drinking milk tea comfortably.

"What a shame for shouting!"

"Then Your Majesty... do you want to hear the news?"

"Xiao Shunzi, I think you don't want to stay in my Prince Jing's mansion anymore. Come here!" Prince Jing waved to the servant who came to deliver the message.

"What are your orders, Your Majesty?"

The servant felt a little aggrieved, he didn't do anything!

"Turn around!"

Xiao Shunzi turned around obediently. King Jing kicked him to the ground, then sat back in his seat and continued drinking his milk tea: "Hurry up and tell me! What's the news!"

"Yes... the shopkeeper of Anding County sent a message that the ice cubes were successfully made!"

King Jing sprayed out all the milk tea he had in his mouth: "Is this true?"

"Your Highness, it is absolutely true. The owner of Yunlai Restaurant saw it with his own eyes! This is the recipe for making ice cubes."

"Great! Great! I didn't expect that such a talented person could be found in such a small county like Anding! Quick, go find a few reliable people and make ice cubes using this method."

King Jing danced with joy and read the prescription carefully. His previous depressed mood was swept away.

With the ice-making method provided by Yao Qingnian, the refrigeration market prospered and summer diet also had a new breakthrough. Sugar and various fruits were added to ice-making to produce a rich variety of cold food products...