“Is it really that amazing? This glass is truly something wonderful,” Yu Ying marveled.
Even during daytime, it was very dark inside, and without lighting a fruit oil lamp, they could barely see anything.
Since the wooden houses had no windows, no light could enter, making everything dim and gloomy.
Using the fruit oil lamp for half the day was quite costly and wasteful. Additionally, the fox eared girl had to sew linen clothes every day, and with such poor lighting, she could not see clearly and had to bring things very close to her eyes.
Over time, her eyesight had deteriorated, though it used to already be below average from the start.
Now, she could not see things clearly from even a short distance away and had to squint to see.
She had thought several times that she might be sick, but felt too embarrassed to mention it.
But now, hearing about this glass that could make wooden houses as bright as daylight, she suddenly understood.
She now believes it must be because she spent every day in a dimly lit wooden house, and had strained her eyes too much.
With glass, everything would be clearer to see. Thinking of this, Yu Ying felt relieved. [It must have been the lighting that has caused my poor vision. Once they installed the glass, everything would be fine.]“There will be an extra-large window on the second floor, and you’ll be able to see much more clearly through it.” Su Bai calmly said.
In his design blueprint, he had planned for a floor-to-ceiling window on the second floor.
The second floor would be their office space, so installing a floor-to-ceiling window would be appropriate.
The design for this floor-to-ceiling window was quite large, looking almost like a wall.
“That’s wonderful! I can’t wait to see what glass looks like.” Yu Ying happily said.
An hour later, they returned to the Tribe, ready to begin making glass.
Su Bai took out all the ingredients he had prepared earlier in the wooden house. These ingredients had all been measured using a balance scale according to the glass manufacturing guide.
Although the balance scale could not not guarantee 100% accuracy, it could at least ensure 90% accuracy.
The cow horned girl and others watched curiously from the side, none daring to interfere for fear of making a mistake.
Su Bai quietly mixed all the glass-making ingredients together, then began evenly stirring them.
After more than ten minutes, he stopped stirring when he was sure everything was thoroughly mixed.
“Shaman, is it ready now?” Ah’Hua curiously asked.
But she did not see anything transparent. After all, was glass not supposed to be transparent?
“Hahaha… Not yet, this is just the beginning. There’s still much more to do.” Su Bai laughed.
He took the mixed ingredients to the kiln. The next step in making glass was to melt the mixture.
The glass mixture needed to be heated at high temperatures (1550-1600 degrees celsius) in the kiln to form a uniform, bubble-free liquid glass that met the molding requirements. ꞦÄΝôBÊS̈
This step was not simple either, as making glass required temperatures of 1500-1600 degrees. Normal fire could not reach that high, which means they needed to continuously pump air into the kiln.
Just like when they made iron before, they needed to use the bellows to constantly pump in air to ensure the kiln temperature reached 1500-1600 degrees.
This was extremely labor-intensive work, requiring numerous people taking turns.
Each person could only work the bellows for three or four minutes before becoming exhausted and needing to be replaced.
The kiln temperature could not be allowed to drop, or all their work would be wasted, so they needed to continuously pump in air.
Su Bai put the prepared glass mixture into a ceramic basin and had it placed inside before the others began taking turns stoking the fire.
*Crackling!*
The flames in the kiln kept burning, gradually changing from pale yellow to orange-red. Even from a distance, they could feel the intense heat, so everyone stood quite far back.
“Shaman, is making glass the same as making iron? Do we just need to heat it up?” they asked.
Her red eyes stared intently at the kiln, as if afraid it might run away.
“It’s not that simple. The work ahead is quite complicated…” Su Bai solemnly said.
If making glass were really that simple, it would be great. However, ideals were beautiful while reality was always harsh.
After the materials become liquid glass, they still need heat treatment. Through annealing, tempering and other processes, internal stress could be eliminated or created, along with changing the glass’s structural state.
However, these steps were not too demanding – they were mainly necessary for making shaped glassware, like cups or vases.
While Su Bai could not make glassware yet, he had already designed out the tools needed for their production.
He would have Uncle Shan Qiu or Gu Mu create them later, in accordance with his drawings.
As long as they followed what he drew, with their years of experience and practiced hands, they would certainly be able to produce what he needed.
However, making window glass was more important at this stage. Glassware was not needed yet.
The main use of glassware was for chemical experiments, which Su Bai did not need at the moment.
As for tools, the Tribe’s ceramic for containers were sufficient.
Plus, with the rainy season approaching, the most important task now was to make glass for all the cement house windows.
After more than an hour, the flames in the kiln grew higher, and all the materials inside had begun to melt.
Gradually, the materials transformed into liquid glass, appearing somewhat grayish in colour.
“Alright, take it out and pour it into the mold,” Su Bai ordered.
“Yes,” the Warrior Trainees nodded and stopped pumping air into the kiln.
They removed the ceramic basin from inside and poured the liquid glass into the prepared mold.
The mold itself was not anything special – just a very large square mold.
This square was made in advance to match the length, width, and height of the cement house windows. Once the liquid glass was poured in, the glass would be ready.
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