"Without further ado, what is Mr. Liu developing this time?"
As for the old man of the Zheng family, Zheng Sheng rolled his eyes, stroked his beard and smiled lightly: "It probably has nothing to do with your family."
"Old man from the Zheng family, please don't be arrogant!"
"That's not certain!"
The three old men started quarreling on the spot, staring at each other like children fighting for toys. This made some passers-by look very interesting, and they admired in their hearts that before the county lord and his son came, these distinguished families
Master, who doesn't have his eyes raised above his head and look at people through his nose? Who would have thought that in just over a month, in front of Young Master Liu, he would fart so hard that he didn't even dare to fart.
"Bring me the wine!"
"Come on, come on, I'll ask the butler to bring a few kilograms of meat!"
"Whoever gets drunk will voluntarily withdraw from this competition!"
"good!"
...
At this time, Liu Zheng in the Shengongfang had burned out three furnaces of glass.
This was what he expected. If this thing was really so easy to burn, the Chinese people would have figured it out long ago.
The raw materials for making glass are quartz sand, limestone, feldspar, and soda ash.
As for the quartz sand and feldspar, they have existed since ancient times, because these two are important raw materials for ceramics. Our country's ceramics are famous overseas, so this quartz sand is still easy to obtain.
Limestone was calcined by Liu Zheng when he was in Yangzhou, so it was not difficult.
And soda ash…
For Liu Zheng, this is even simpler. Because natural soda ash mainly exists in salt lakes! If Liu Zheng were in other cities, this thing would be very difficult to deal with. But... this is Yinzhou!
Why did Liu Zheng choose Yinzhou as his fiefdom in the first place? Because there are salt lakes and mine salt here!
Therefore, probably in the entire Longyan Dynasty, only Yinzhou can produce the kind of glass Liu Zheng wants!
Now that the materials are complete, the next step is the craftsmanship.
The first is the ingredients. This is the longest process, because Liu Zheng needs to constantly explore the proportions. Mix these materials evenly, and each different proportion will directly affect the quality of the glass.
Then the next step is calcination. The prepared raw materials are heated to high temperature to form a uniform bubble-free glass liquid, usually between 1,200 degrees to 1,600 degrees. At this temperature, the blast furnace of Liu Zhengshen Workshop
And it can be realized. The time required is four hours, that is, more than eight hours, to fire into molten glass.
The third process is molding. What Liu Zheng currently wants to make is a bottle for carrying perfume, so he has already made a ceramic mold. He only needs to pour the glass liquid into it, and then after a cooling process, the glass is first made of
The viscous liquid state changes to a plastic state, and then to a brittle solid state.
The last step is annealing.
Glass has experienced drastic temperature changes and shape changes during the forming process, which leaves thermal stress in the glass. This thermal stress will reduce the strength and thermal stability of the glass product. If it is cooled directly, it is likely to
It will break by itself during the cooling process or during subsequent storage, transportation and use. In human terms, keep it at a certain temperature and let it keep warm or cool down slowly.
Liu Zheng, on the other hand, added a certain amount of lead during the production process, which allowed the glass bottles to be made. The added refractive index allowed the bottles to produce dazzling refraction.
In other words, what he is working on now is the crystal glass of future generations!
Then there are colored glasses of various colors.
This time was different from the previous times. This was a real chemical reaction, so when Liu Zheng tried it, he had already driven everyone outside. Because if you are not careful, a chemical accident will occur.
He drilled in the God's Workshop for five days.
"boom!"
That night, a loud noise suddenly came from the Shen Workshop.