People in Datang have been expelled from school

Chapter 697 Glass
Li Zheng started to collect stones for firing glass with a book on glass crafts.

The firing of glass is not complicated at all.

To put it simply, it is not simple.

At first, I just burned it casually, and just burned out a crystal.

Leading the big dog, Li Zheng bumped into Li Tai as he walked out of the village.

Li Tai looked at Li Zheng, "Why did you leave the village?"

Li Zheng put the book into the book bag and said, "I'm going out to collect some stones."

"Stone?" Li Tai looked at the big dog looking around, "I think you are walking the dog."

Li Zheng led the big dog and said, "Walk the dog by the way. If you encounter robbers on the way, you can use the big dog as a bodyguard."

"Really?" Li Tai said, "Anyway, I'm free and fine, let's go for a walk together."

Walking to the southeast of the village, you can see a mess in the distance.

This is where Li Shimin used to hunt.

Nearly ten thousand people stayed here for several days and nights.

After these people hunted here, they left a mess.

Public morality is sometimes very important, but not everyone has public morality.

Li Zheng said melancholy: "Tell me, your father is happy, and left so much rubbish."

Even the big dog turned his head in disgust and did not want to go in.

Li Zheng looked at the rubbish on the ground, "It will affect the appearance of our Jingyang village a lot. Someone needs to clean it up."

Li Tai said: "I will find someone to clean up. Those rich and powerful children are indeed too unruly."

After walking through this hunting ground, you will arrive at Longshouyuan.

Li Zheng picked up a handful of sand, and after confirming it, he took some and put them in the bag.

After walking for a while, Li Zheng continued to search for sand.

Li Tai followed all the way and didn't understand why Li Zheng was so interested in sand.

After finding a package of sand, Li Zheng walked back.

Li Tai asked curiously: "Li Zheng, what are you doing with so much sand?"

Li Zheng opened the water bag and took a sip of water, but did not answer Li Tai's words.

It was already noon when we arrived in the village, and the warehouse was almost repaired.

Li Yifu said: "The places where the rain leaked have been repaired, Chang'an ordered to see if there is anything else to add."

Li Zheng looked at it and said: "Prepare a few pots of different sizes, as well as bowls and bottles, and prepare tables and chairs for us."

Li Yifu asked curiously: "Is Chang'an Ling planning to cook here?"

Li Zheng glanced at Li Yifu and said, "It's not cooking."

"Then...then let's arrange it here."

Li Yifu didn't ask any more questions, and immediately found someone to handle the matter.

Li Tai went to see Li Yuan, and wanted to say hello to his grandpa.

He untied the rope around the big dog's neck, smelled the smell of food from every household, and ran away.

Back home, Li Zheng simply cooked a few dishes.

The family simply ate a few bites.

Xiao Sizi and Li Zhi came to eat early, and left after eating.

The first to come and the fastest to eat.

Li Lizhi and Xu Hui came later.

Li Zheng dealt with it a few times and wanted to continue to do experiments.

While eating alone, Li Li asked Xu Hui, "What is Li Zheng doing these days?"

Xu Hui replied: "I don't know exactly what Chang'an Ling is going to do. It should be preparing for the next trip to Tubo."

Li Lizhi nodded as she ate her meal, "Recently, several merchants in Fangshi want to merge their operations. We will clear up their accounts today, so that it will be easier to schedule in the future."

Xu Hui nodded, "Understood."

Li Lizhi said again: "Is Wu Mei back?"

"It is said that you can go to Jingyang tomorrow."

After eating, Li Lizhi started busying with her career again.

Li Zheng came to Tieda's shop and began to prepare for firing glass.

The smithy is for forging iron, and it is no problem to use the firepower of wrought iron to burn glass.

An experienced iron master with forging experience, he was a little dumbfounded for a while when he saw that Li Zheng had brought some sand and sand to burn.

"Chang'an Ling, can this sand be calcined?"

"Of course I can."

After speaking, Li Zheng poured the sand on the stove.

The main material composition of glass is quartz sand, borax, boric acid, barite, barium carbonate, limestone, and feldspar.

The different ingredients cause the forged glass to have different transparency and quality.

At that time, I had just been kicked out of Chang'an Bookstore, and the glass that was fired was not actually glass, but more like a semi-finished crystal of glass.

The earliest record of glass is in the ancient Egyptian civilization 4000 years ago.

Just a small glass bead.

There are similar records in the Central Plains. After the mountain fire, some translucent crystals will appear on the mountain. These are clues to the firing of glass.

In later generations, people began to use the sand in the sea to burn glass.

It just so happened that a few Westerners buried pots for cooking by the sea, and after cooking, they found some shiny crystals under the fire.

Later, they discovered that glass balls could be made by firing quartz sand and natural soda.

These people also made a fortune from the way glass was fired.

At that time, the glass was not transparent, but more opaque colored glaze.

In the Middle Ages, colored glass became a handicraft, and there were many glasses of different colors on the windows of Westerners.

In fact, some things are added to the glass during the firing process, and it becomes colored.

Tie Da, Tie Er, Tie San, and the three Tie family brothers didn't understand why the sand was burned, but they did it anyway.

As the bellows continued to push, the flames rose higher and higher, and the sand burned red.

The smithy was getting hotter and hotter.

Li Zheng took out a few pieces of cloth and asked the three brothers of the Tie family to cover their noses and mouths, "From now on, you must bring the burning sand with you."

Li Zheng stopped the fire when the sand was burning red.

After the bellows stopped, the flames began to diminish.

After waiting for half an hour, the problem with the stove has also been reduced a lot.

Li Zheng observed the sand on the stove and found several crystals in the sand.

It is blue-green, which means that there is iron in the fired glass.

In order to produce transparent or translucent sand, the iron element needs to be removed.

Li is writing down a chemical formula that can remove iron from sand with manganese dioxide.

Knowledge creates wealth, and the knowledge learned by future generations is really beneficial.

Using manganese dioxide can convert the iron in the sand into ferrous oxide, thereby separating the iron element.

Tie Da looked at the blue-green crystals picked out from the sand in a daze, "Chang'an Ling, is this Liuli?"

Li Zheng continued to look at the chemical equation he had written down and said, "This is glass, not colored glaze. It doesn't make much difference if you treat it as colored glaze."

Tie Da hurriedly said to his other two brothers: "If you dare to say a word about what happened today, the big brother will tear your mouths apart!"

(End of this chapter)