Liang Wensheng came back to his senses, and then looked at the glassware on Su Shaowen's blowpipe.

There was a flash of astonishment on his face, and then he took a few steps closer, looked very carefully, and exclaimed, "Is this done?" There is not a single bubble, it is really like what the master said, it is crystal clear and completely transparent! Shaowen, you are amazing! ”

Su Shaowen pursed his lips and smiled shyly, obviously happy.

"I'll tell the master!" Liang Wensheng couldn't help but be overjoyed, turned around and ran out!

"Senior brother......" Su Shaowen opened his mouth to stop him, but Liang Wensheng ran too fast, and he had already run a long way out at once.

Su Shaowen looked at the blowpipe in his hand, his heart was full of a sense of accomplishment, and he decided to try a few more times to try to make better glassware.

He carefully peeled off the cooled glass from the blowpipe and placed it on the side of the divider.

There are already many glassware on the partition, in various forms, all of which were experimented by Su Shaowen during this time.

He has been experimenting with different strengths and angles to see what kind of shape or arc he can blow out, and this time the glass is his most satisfying work so far.

Su Shaowen put the glass up, and just let go, there was a sudden bang! ——

The glass is blown up!

A gap was made at the bottom of the cup, and the glass slag that splashed out cut through Su Shaowen's fingers, leaving a shallow red mark.

Su Shaowen was stunned, staring blankly at the glass that had been shattered.

How happy I was, how disappointed I was at the moment......

He thought of himself standing by the furnace day and night, constantly figuring out all kinds of techniques for blowing glass, thinking that he was so sweaty from the furnace that he had prickly heat, itching that he couldn't sleep all night, thinking that he was blowing so hard that his mouth was wooden, and he didn't dare to relax for half a minute!

Because he's afraid......

I was afraid that I would be incompetent and would be sent back by Hua Qingxue.

He knew that he was clumsy and clumsy, and he didn't like Master Song, so he worked as an apprentice for Master Song for a year, but he kept doing chores and coolies in the workshop.

Master Song disliked him for being too short and thin, and the master also thought he was unpleasant.

He wanted to learn how to make glass, so he secretly collected the leftovers left over from the master's brother making glass, but he was found out and immediately beaten and scolded.

Now that he has the opportunity to stay in the firearms camp to make glass, it is like a dream for him, so he must not lose this job!

Su Shaowen bit his lip, turned around and took a 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 the firearms camp, and as soon as she entered the door, she saw a pile of broken glass slag by the door.

Su Shaowen wiped the sweat from his face, turned around with a smile, "Master, you wait a while, I'll be fine soon." ”

With that, he turned back and continued his work at the furnace.

Liang Wensheng ran to the wall and put it on the shelf, but instead of finding the glass that Su Shaowen had just made, he found a row of broken glassware, some of which were not broken, and there were cracks on the bottles.

"What's going on?" He was surprised and looked at Su Shaowen.

Hua Qingxue was also at a loss.

Su Shaowen walked over slowly with a blowpipe, his expression revealing nervousness, "It will definitely not break this time...... It won't break ......."

However, God seemed to be joking with him on purpose, and when Su Shaowen gently put down the glass, thinking that he was fine, a soft voice suddenly sounded-

Click, click.

The smooth wall of the cup cracked a thin slit, like a strand of hair falling on it, which was very unsightly.

Su Shaowen's eyes finally turned red, he bit his lip tightly, and looked at the cracked cup fixedly, his face full of unwillingness.

"Master, I'...... I don't know why this is ......" Su Shaowen hung his head and looked at the blowpipe in his hand, his face was full of frustration and chagrin, he was extremely helpless.

Liang Wensheng saw it in his eyes, and he couldn't help but say: "Master, Shaowen really has the kind of glass you want, I saw it with my own eyes, and there is no impurity at all!" There are no bubbles either! Shaowen works hard every day, and in the firearms camp, he is always the last to go to bed and the first to get up......"

Hua Qingxue didn't seem to be listening at all, staring at the crack on the wall of the glass, looking thoughtful.

"That...... Master? ......" Liang Wensheng called tentatively.

"Ahh Hua Qingxue suddenly shouted, her hands clapping loudly, "I know what's going on!" ”

Liang Wensheng and Su Shaowen glanced at each other, both confused.

Su Shaowen asked in a low voice, "Master, do you know the reason for the cracking of the glass?" ”

Hua Qingxue's face flushed slightly, as if she was a little embarrassed, "It's my fault, I forgot to tell you that the last step in making glass is annealing, and glass that has not been annealed is very easy to break, also called cold explosion." ”

"Annealing?" Su Shaowen asked in a daze, "What is annealing?" ”

"Annealing is to continuously keep the glass warm or cool it down slowly for a period of time after the glass is finished to reduce the thermal stress in the glass." Hua Qingxue picked up the cracked glass and explained to Su Shaowen, "The glass has undergone drastic temperature changes and shape changes in the forming, which has left thermal stress in the glass, and the thermal stress will reduce the strength and stability of the glass products. ”

Su Shaowen looked at the glass in her hand blankly, "That is to say...... I didn't do anything wrong? Is there a problem with my blowing method? ”

"Hmm." Hua Qingxue smiled slightly, reached out and gently touched Su Shaowen's head, "You did a good job, but you are one step less than this." ”

Su Shaowen was relieved, and finally had a smile on his face, "Master, then I'll do it again, this time I will remember to anneal." ”

Hua Qingxue shook her head, "No need to do it." ”

When Su Shaowen heard this, his heart suddenly hung up!

He looked at Hua Qingxue nervously, his eyes showing panic, worried that Hua Qingxue would think that he was not clever enough and didn't want him......

Hua Qingxue pondered for a moment and said, "You have to help me make something else first......

Su Shaowen's heart was suspended, and he asked cautiously, "What does the master want me to do?" ”

"I'm going to Shengjing with the general in a few days, and 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 help of both of you." ”

Liang Wensheng was stunned, looked at Su Shaowen, and then at Hua Qingxue, "Uh...... Master, Shaowen and I don't know how to make mirrors......"

"You help me prepare tin foil and mercury, and Shaowen will make the same size glass according to the size of the mirror we usually use." Hua Qingxue thought for a moment and added, "...... Ah, by the way, we have to find some craftsmen who are good at carving, to help us set the back of the mirror, to carve some auspicious patterns. ”

If you want to make a thin and flat glass plate, Su Shaowen has been able to do it after this period of practice.

There are ready-made molds for making glass plates in the workshop, and you only need to inject a thin layer of frit, let it cool and peel off the mold.

It's just that this thing is thin and brittle, how can it be made into a mirror?

Liang Wensheng imagined a bronze mirror inlaid with glass in his mind, how did he think about it......

The two prepared according to Hua Qingxue's requirements, and in the following time, Hua Qingxue gave them a chemistry lesson, focusing on the chemical reaction process after the mercury and tin met.

Simply apply the shiny tin foil to the glass surface and pour the mercury over it. Mercury is a liquid metal that dissolves tin and waits until the two merge into a viscous, silvery-white liquid that clings tightly to the glass pane and the mirror is done.

"The principle of the mirror is to be able to reflect light, in fact, the ability to reflect light is not very strong, but with our current conditions, it can be regarded as a great success."

Hua Qingxue looked at the mirror in the mold that was in the reaction, with a faint smile on her face, and her tone was relaxed, "When we make a still in the future, we can refine silver nitrate, and there will be a more convenient way to make a better mirror." ”

Although Su Shaowen has been making glass for a while, this kind of chemical knowledge is the first time he has come into contact with it, and he listened very carefully, and the more he listened, the more he felt great admiration for Hua Qingxue.

"Master, you are so good, you can do anything." Su Shaowen said sincerely.

Compared with Master Song's stinginess, Hua Qingxue can be regarded as unreserved about him, and is willing to teach him no matter what the problem.

Liang Wensheng is actually one year older than Hua Qingxue, and he also admires Hua Qingxue, "Yes! Master, nothing will be difficult for you! ”

Hua Qingxue smiled when she heard this, "It's actually very simple, and when you are familiar with this knowledge in the future, you will understand that in fact, in the world we live in, everything is composed of elements, as long as we understand the characteristics of these elements, and then make artificial combinations, we will get the effect we want." ”

She casually picked up the semi-finished glassware made by Su Shaowen on the side and said: "For example, this glass, in the eyes of ordinary people, is a transparent and fragile object, but in my eyes, it is just silica." ”

She put down the glass and picked up the porcelain cup that Su Shaowen used to drink water, "What is this?" A cup, but for me, it's an aluminosilicate compound, and the main component is aluminum oxide. ”

Liang Wensheng suddenly realized, "No wonder the master asked us to memorize the list of chemical elements, it turned out to be so that we can better understand the constituent elements of these living objects!" ”

Hua Qingxue smiled and nodded, "There is no shortcut to learning chemistry, after memorizing the element table, we will understand the characteristics of each element one by one, but we have limited conditions now, and we can't 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 in general pharmaceutical factories, and everything is of purity.

But here, Hua Qingxue can only find a way to extract it by herself.

There are also elements that were so rare in ancient times that it was almost impossible to find.

But how to say it...... Although it was difficult, watching Liang Wensheng and Su Shaowen seriously exchange each other's understanding and views on the elements, Hua Qingxue's sense of accomplishment arose.

She felt that she had done a good thing, and this unexpected crossing seemed to have become meaningful.

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