What can this saltpeter be used for?
Mrs. Jing naturally couldn't guess it, so she sent people to Qingxi Town to keep an eye on Jing Qingrong and Su Liuer.
The people she sent arrived in Qingxi Town on the same day as the people transporting saltpeter.
Su Liuer was going to do an experiment in making ice from saltpeter, so she closed the shop for half a day and didn't open in the morning.
The backyard of the shop was big enough, so Su Liuer had someone build a pond with bricks and stones, which was as high as her knees. She also asked Dali Xiaoli to bring back the iron box made by the blacksmith.
Jing Qingrong and Qingfeng brought people to transport the saltpeter to the shop. There were five boxes in total. The boxes were filled with waterproof oil paper and wrapped tightly on the outside.
After putting down the saltpeter, Jing Qingrong sent the people who were transporting the saltpeter away.
"Can you tell me now what these saltpeter are used for?" Jing Qingrong asked Su Liuer.
Su Liuer gave him a mysterious smile and said, "It's better for you to see it with your own eyes than to tell you. You will know it later."
Everything was ready, and she began to experiment with making ice from saltpeter.
Because it was an experiment, Su Liuer did not use the pool directly, but took a wooden basin.
She placed the iron box filled with water in the center of the wooden basin, then poured water into the basin until the water level was lower than the edge of the box, and then began to add saltpeter into the water in the basin.
Because she didn't know how much saltpeter would be needed, she gradually increased the amount.
A group of people gathered around and stared at her, and they still didn't understand what Su Liuer was doing.
I only saw her putting saltpeter into the water.
These saltpeter are not cheap. If she just puts them directly into the water, the saltpeter will melt into the water. Wouldn't it be a waste?
Everyone frowned in confusion.
However, Su Liuer continued.
This is a process of quantitative change to qualitative change. The saltpeter dissolved in water will absorb a large amount of heat. If it is enough, the water in the wooden basin and iron box will condense into ice.
Suddenly.
"Brother, look!" Ying Li exclaimed.
What was he seeing in broad daylight? Why was the water slowly changing? Was it going to freeze?!
Once it starts changing, it will continue to change.
Su Liuer continued to add saltpeter into the water. Gradually, the water in the wooden basin outside solidified, and the water in the iron box was also solidifying visibly.
I don’t know how long it took.
Because everyone was stunned by the scene in front of them, it felt like time had slowed down abnormally, and it felt a bit like something was going crazy.
"It's frozen! The water has turned into ice!" Ying Li was the first to exclaim and went forward to touch it.
Su Liuer did not stop them, and then one by one they went forward to touch the ice cubes that had been successfully made.
Everyone was so shocked that they looked incredulous, and suspected that there was something wrong with their eyes and hands.
Ying Li even reached out and pinched Ying Li, causing Ying Li to scream in pain. Only then did Ying Li believe that he was not dreaming!
"Boss! You're amazing! Is this some kind of magic? Are you actually a witch?"
Su Liuer reached out and knocked Ying Li on the head, saying unhappily, "You are the witch, all mysterious and mysterious."
Jing Qingrong pulled Su Liuer over and said to her excitedly, "This is ice making! You actually made ice! Do you know how much money you can make from this?! We're going to make a fortune, we're going to make a fortune!!!"
Jing Qingrong was so excited that he opened his arms to hug Su Liuer.
"Young Master! Men and women shouldn't touch each other!" Qingfeng suddenly pulled Jing Qingrong away with such force that he almost pulled his young master to the ground.
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