That night, Bai Haitang went through the chemical raw materials needed to make fireworks, such as aluminum powder, carbon powder, etc. in his mind. Before dawn the next day, Bai Haitang got up and quietly came to the mine under the moonlight.
inside.
Every time she came to the mine, she felt like she was a thief. She was helpless about this, so she had no choice but to become a "thief" in order to keep the place.
At the entrance of the cave, under the faint morning light, before Bai Haitang could take a step forward, she discovered that there were footprints on the ashes of the vegetation...
If you look closely, you can see that the footprints are messy and the shoe size is very large. They should be the footprints of a man. There is dew around it, so it seems that someone has been here a few days ago.
Who is the one?
Generally no one in the village would come to this haunted place, and even fewer people outside the village would know that there is a mine here.
Bai Haitang walked around the ashes of the vegetation and walked towards the cave, fearing that she might not have what she needed.
Everything was fine in the cave, which made her feel a little relieved. She quickly took what she needed and went back to refine it. Then she left the mine. When she left, she carefully sprinkled a layer of plant ash left last time to cover the footprints.
She wanted to know if that person would come again.
If you take a step back and think about it, even if someone comes to the mine, they don't remember knowing how to refine the things in the mine, let alone how to apply them.
So Haitang walked back to the dyeing workshop in the morning light.
"Sister Haitang, you went out so early." When I came back, I met Brother Lamei at the door of the dyehouse who was going out to work with a hoe.
This young man became more and more diligent. He got up earlier than others, took a few steamed buns and a tube of water, and walked into the fields with these on his back.
Bai Haitang looked at the signboard at the door, which had been tied with cloth strips of nine colors. Different colors shone in the morning light. The morning breeze blew by, and the cloth strips slowly swayed in the wind, teasing Bai Haitang's hair.
Feeling.
The flat wooden board on the signboard is waiting for Datong to come back and write the four characters "Haitang Dyeing House" in his own handwriting.
Walking into the dyeing workshop, Bai Haitang began to study the technology of making fireworks.
There were a lot of materials left over from the last time I made black powder, especially charcoal, which was readily available.
Different from black powder, fireworks also have the effect of sparks, and the sparks are different. Some are like shooting stars streaking across the sky, and some are like peonies and chrysanthemums that bloom instantly in the sky.
The splendor they bring is worth the scream when you first see them.
When hardwood charcoal powder, aluminum powder, and iron powder are added to the agent, after burning, some particles are not completely burned out in the light interceptor and are ejected. When these ejected particles meet the oxygen in the air, a third phase will occur.
The secondary combustion reaction produces different colors and a certain brightness.
This is how sparks work.
Hardwood charcoal powder can produce small golden stars; iron powder can produce small steel orchid stars; aluminum powder can produce small white stars. Using the effect of spray waves, various fireworks images can bloom in the night, such as golden stars.
, white, steel blue and other spray flowers.
Throughout the morning, Wintersweet was dyeing cloth in the yard of the dyeing workshop, while Bai Haitang was tinkering with refining reagents in the house.
At noon, after lunch, everything that should be refined was almost refined. Packets of minced powder were placed on the shelf. Bai Haitang knew what they were based on their color and smell.
Others may be confused when they see it, and it is even more difficult to believe that this can produce so-called fireworks.
In addition to medicine, Bai Haitang also took some mud made from tree bark and mud water.
Modern fireworks use cardboard shells as outer shells to separate various chemicals for secondary and tertiary combustion in the air. Now that there is no paper shell, Bai Begonia uses tree bark instead.