Chapter 83: chemistry class

Liang Wensheng recovered, and then looked at the glassware on Su Shaowen's blowpipe.
There was a shock on his face, and then he took a few steps and looked very carefully and exclaimed: "Is this done? No bubbles, really like the master said, clear and complete, completely Transparency! Shaowen, you are amazing!"
Su Shaowen pursed his lips and smiled shyly, obviously also very happy.
"I'm going to tell the master!" Liang Wensheng couldn't help but turned and ran out!
"Brother..." Su Shaowen opened his mouth and tried to stop him, but Liang Wensheng ran too fast and ran out all of a sudden.
Su Shaowen looked down at the blowpipe in his hand, and his heart was filled with a sense of accomplishment. He decided to try a few more times in order to make better glassware.
He carefully peeled off the cooling glass on the blowpipe and put it on the side partition.
A lot of glassware has been placed on the partition, all kinds of shapes, all made by Su Shaowen during this time.
He has been experimenting with different strengths and angles to see what shape or arc can be blown out. This time the glass is his most satisfying work.
Su Shaowen put the glass up, just let go and suddenly banged!
The glass exploded!
A gap was cracked from the bottom of the cup, and the splashed glass cut Su Shaowen's fingers, leaving a shallow red mark.
Su Shaowen was stunned, staring blankly at the broken glass.
Just how happy you were, how disappointed you are...
He thought of staying by the furnace day and night, constantly trying to figure out the various techniques of blowing glass, thinking of being roasted in the furnace and sweating on his back, and itching to sleep all night, thinking that he was blowing his mouth and wood, nor Dare to relax half a point!
Because he was afraid...
Fear of being incompetent, he will be sent back by Hua Qingxue.
He knew he was clumsy and did not like Master Song. He had been an apprentice to Master Song for a year, but he had been doing hard work and hard work in the workshop.
Master Song thinks that he is too short and too thin, and the mother-in-law thinks he is not pleased.
He wanted to learn to make glass, so he secretly collected the leftovers from the master and his brother when he made glass. When he was found, he immediately scolded him.
Now that the opportunity he has finally obtained, he can stay in the firearm camp to make glass, which is like a dream for him, so he must not lose this job!
Su Shaowen bit his lip, turned to take the broom and dustpan, cleaned it silently, and then began to make new glass.
He must succeed.
...
Hua Qingxue followed Liang Wensheng to the glass workshop of Huoqiying Camp. When he entered the door, he saw a pile of broken glass beside the door.
Su Shaowen wiped the sweat from his face and smiled and turned around, "Master, wait a moment, I will be ready soon."
He said nothing and turned back to continue to be busy by the furnace.
Liang Wensheng ran to the shelf beside the wall and didn't find the glass made by Su Shaowen. Instead, he found a row of broken glassware. Some of the bottles had cracks even though they didn't break.
"What's going on?" He surprised, looking at Su Shaowen.
Hua Qingxue was also confused.
Su Shaowen slowly walked over with a blowpipe, his expression showing tension, "This time it will not break...it will not break..."
However, God seemed to deliberately joke with him, when Su Shaowen gently put down the glass, thinking it was safe, and a soft tone suddenly sounded-
Click, click.
The smooth cup wall cracked a thin slit, like a strand of hair falling on it, very eye-catching.
Su Shaowen's eyes were finally red, he bit his lip tightly, determined to look at the cracked cup, his face full of unwillingness.
"Master, I... I don't know why this is happening..." Su Shaowen looked down at the blowpipe in his hand, his face full of frustration and annoyance, he was helpless.
In his eyes, Liang Wensheng was very disappointed and couldn't help but said, "Master, Shao Wen really made the kind of glass you want. I saw it with my own eyes, and there are no impurities! There are no bubbles! Shao Wen He worked hard every day. In the firearm camp, he was always the latest one to sleep, and the first one to get up..."
Hua Qingxue didn't seem to be listening at all, staring at the crack in the glass wall, looking thoughtful.
"That...Master?" Liang Wensheng screamed tentatively.
"Ah!" Hua Qingxue suddenly shouted, clapping his hands, "I know what's going on!"
Liang Wensheng and Su Shaowen glanced at each other, both confused.
Su Shaowen asked quietly, "Master, do you know the reason for the glass cracking?"
Hua Qingxue's face turned slightly red, as if a little embarrassed. "It's my fault. I forgot to tell you that the last step in making glass is annealing. The glass without annealing is very easy to break, also called cold explosion."
"Annealing?" Su Shaowen asked startled, "What is annealing?"
"Annealing means that after the glass product is completed, continuous heat preservation or slow cooling for a period of time to reduce the thermal stress in the glass." Hua Qingxue picked up the cracked glass and explained with Su Shaowen, "The glass was subjected to intense temperatures during forming Change and shape change, this change leaves thermal stress in the glass, and the thermal stress will reduce the strength and stability of the glass product. At this time, the temperature drops suddenly, it is likely to break, so the glass product must be carried out after forming annealing."
Su Shaowen stared blankly at the glass in her hand, "That is to say... I didn't make a mistake? Is my blowing method no problem?"
"Huh." Hua Qingxue smiled slightly and reached out to gently touch Su Shaowen's head. "You did a good job, only one less step will do this."
Su Shaowen was relieved and finally had a smile on his face, "Master, then I will do it again, this time I will remember annealing."
Hua Qingxue shook his head, "No need to do it."
Su Shaowen heard that his heart suddenly hung up!
He looked at Hua Qingxue uncomfortably, and his eyes were panic, worried that Hua Qingxue thought he was not clever enough, so he didn't want him...
Hua Qingxue pondered for a moment and said, "You have to help me make some things first..."
Su Shaowen suspended his heart, and then let it go, he asked cautiously: "What does the master want me to do?"
"Some days I will go to Shengjing with the general. I want to make some mirrors as gifts for Shengjing's friends." Hua Qingxue looked at Liang Wensheng and said with a smile, "This matter needs the two of you to help."
Liang Wensheng was stunned, looking at Su Shaowen, and Hua Qingxue again, "Uh... Master, Shaowen and I won't be mirrors..."
"You help me prepare the tin foil and mercury, Shaowen makes the same size glass according to the size of the mirror we usually use." Hua Qingxue thought about it, and added, "... Ah, yes, I have to find it again. Some craftsmen who are good at carving help us inlay the back of the mirror and engrave some auspicious patterns."
Want to make a thin and flat glass plate, Su Shaowen after this period of practice, is sufficient.
There are ready-made molds for making glass plates in the workshop. You only need to pour the glass frit into a thin layer, let it stand and cool and peel off the mold.
It's just that this thing is thin and crisp, how can it be a mirror?
Liang Wensheng imagined a bronze mirror inlaid with glass in his head, how strange he felt...
The two prepared according to Hua Qingxue's requirements. In the following time, Hua Qingxue gave them a chemistry class, focusing on explaining the chemical reaction process after mercury and tin met.
Just stick the shiny tin foil on the glass and pour the mercury. Mercury is a liquid metal. It can dissolve tin and wait quietly until the two merge into a viscous silver-white liquid, tightly attached to the glass plate, and the mirror is finished.
"The principle of the mirror is to reflect light. In fact, the mercury-coated mirror is not very strong in reflecting light, but under our current conditions, it can be regarded as a great success."
Hua Qingxue looked at the mirror in the static reaction in the mold, with a faint smile on his face, and his tone was relaxed, "When we make a distiller in the future, we can extract silver nitrate, there will be a more convenient way to make more Good mirror."
Although Su Shaowen has been making glass for some time, this chemistry knowledge was his first contact. He listened very seriously. The more he listened, the more he admired Hua Qingxue.
"Master, you are so powerful, you can do anything." Su Shaowen said heartily.
Compared to Master Song's stinginess, Hua Qingxue can be regarded as completely unreserved to him, and he is willing to teach him no matter what the problem.
Liang Wensheng is actually one year older than Hua Qingxue. He also worships Hua Qingxue. "Yes! Master, you can't fail you!"
Hua Qingxue smiled and said, "In fact, it is very simple. When you become familiar with this knowledge in the future, you will understand that in the world we are in, everything is composed of elements. Once you understand the characteristics of these elements, If we make another artificial combination, we will get the effect we want."
She took aside the semi-finished glassware Su Suowen had previously made and said, "For example, this glass is a transparent and fragile object in the eyes of ordinary people, but in my eyes, it is just silica."
She put down the glass and picked up Su Shaowen's porcelain cup for drinking water. "What is this? A cup, but for me, it is an aluminosilicate compound and the main component is aluminum oxide."
Liang Wensheng suddenly realized, "No wonder the master let us recite the chemical element table, it was originally to let us better understand the constituent elements of these living objects!"
Hua Qingxue nodded with a smile, "There is no shortcut to learn chemistry. After memorizing the element list, we can understand the characteristics of each element one by one, but we have limited conditions now, there is no way to teach you one by one..."
After all, it is not modern, and many chemicals can be bought directly, such as silver nitrate, which is sold by general pharmaceutical companies, and of all purity.
But here, Hua Qingxue can only find ways to extract it himself.
There are also some elements that were extremely rare in ancient times and almost impossible to find.
But how to say... Although it is difficult, but watching Liang Wensheng and Su Shaowen seriously exchange each other's understanding and views on the elements, Hua Qingxue's sense of accomplishment came into being.
She felt that she had done a very good thing, and this unexpected crossing also seemed to make sense.