I was a village chief in a primitive society

Chapter 165: The crystallization of mud and fire. (3 more please customize)

"crackling......."

The fire in the earthen kiln was burning brightly, and the firewood was burning until it crackled loudly.

After Lu had glazed all the earthen bowls, Su Bai had people start burning fire in the earthen kiln, planning to carry out the final step of making porcelain.----kiln

"Wu, are you going to throw these things in and burn them?"Yanhua pointed curiously at the glazed earthen bowl.

"Of course not. The porcelain fired in this way will be pitch black and may even burn out."Su Bai smiled, is it okay to just burn it?

"Then why did the witch let people light the fire? It's still so hot."Yanhua blinked her red eyes curiously.

"This is the last step in making porcelain, called kiln firing. Wait until the fire is low before putting the porcelain in it."Su Bai explained.

The operation of the kiln is a very important step. If you don't pay attention, all your efforts will be wasted, which not only wastes raw materials and fuel, but also wastes a lot of manpower.

In terms of ceramic craftsmanship, in terms of importance, it can be divided into First firing, second soil, third production, in a sense, firing the kiln is the key.

Yanhua regretted a little that she shouldn't have asked, and didn't understand what it meant after hearing it, so she had to change the subject and said:"Witch, I have just finished applying that thing called glaze, can it be fired immediately?"

"Well, that's okay."Su Bai said softly

"Wu, to what extent does this kiln need to be fired?"Lu asked seriously.

Because he learned that these are things he will master in the future, and he must study them carefully. If you don't understand, you should ask

"When the temperature reaches more than a thousand degrees, the porcelain can be put in."Su Bai explained

"More than a thousand degrees? Lu scratched the back of his head and asked doubtfully:"Witch, what is more than a thousand degrees?""

"As for the temperature in the kiln, I will give you a thermometer in the future, so that you can better control it."Su Bai said.

With the Philosopher's Stone, it's easy to get mercury, and it's not too difficult to make a thermometer.

"thermometer?"The words Lu heard today were all unfamiliar, but he still nodded and continued to ask:"Witch, how long will it take to bake this earthen kiln?"

"The kiln firing will last one night and the next day."Su Bai said seriously.

Everyone's eyes widened when they heard this, and they wondered several times if they heard it wrong.

"Wu, do you really want to burn it for a day and a night? Yanhua said in surprise

"Well, this is still a relatively short period of time, some may take three to seven days."Su Bai said word by word.

He naturally knew that making porcelain is not easy. Many ceramics need to be put into the kiln several times.

This is just the firing time, and some also need to add pre-production of clay embryos, painting, coloring, etc. Wait, it takes a long time

"Three to seven days? Lu looked different and said in surprise:"Wu, is this time too long?""

"This is the troublesome time it takes to make porcelain. What we are doing does not take that long. One day and one night of firing is enough." Su Bai explained.

Lu put away his surprise and became excited, asking:"Witch, is there a different way to bake this porcelain?"

When he heard that there was another way to make porcelain, he became excited again. People who are eager to learn are like this. When he heard that there was another way, he was naturally curious and wanted to learn it too.

"Don't be in a hurry, just learn what you are doing now. There will be plenty of opportunities to learn other things in the future."Su Bai signaled the other party to calm down.

He also said this on purpose. As long as others have expectations, he will do better.

"yes."Lu immediately responded

"crackling......"

The fire in the earth kiln was burning brightly, and the thick smoke coming out was very pungent. They followed Su Bai's instructions and kept adding firewood into it.

If you want the temperature in the earthen kiln to reach over a thousand degrees Celsius, you have to add more firewood all the time.

"Wu, why not roast it directly on the fire pit?"Lu asked doubtfully.

"The products baked in this way are usually defective products, which will only waste time and manpower."Su Bai explained word by word.

He remembered that before, people initially piled firewood on the flat ground and put the green body on it to light the fire.

However, this method could not reach a certain temperature due to the lack of concentration of firepower, resulting in The quality of fired pottery was poor and the yield of finished products was low.

So later people invented pottery kilns. There were two main types of pottery kilns in the Neolithic Age: horizontal cave kilns and vertical cave kilns.

Horizontal cave kilns were more typical, consisting of a fire mouth, a fire chamber, The kiln chamber is composed of a fire channel, a kiln chamber and a kiln grate. The kiln chamber is round in shape, with a kiln grate on the bottom and many fire holes on the grate. The flame entering from the fire chamber reaches the kiln chamber through the fire channel and fire holes. The vertical cavity kiln The kiln chamber is above the fire chamber. The fire chamber is a bag-shaped pit with a small mouth and a large bottom. There are multiple vertical fire channels leading to the kiln chamber. What

Su Bai asked people to build was a vertical cave kiln. This kind of construction It's easier to come out

"So Wu asked people to build this earthen kiln. You are really smart."Lu Pei was so impressed that he fell to the ground.

"The most critical process of making porcelain is firing in the kiln, so you should pay more attention to it."Su Bai said seriously.

In the kiln, the high temperature generated by the wood fuel causes a chemical reaction in the clay, which leads to changes in the composition, performance and color of the body.

The structure of the kiln determines the firing temperature of the porcelain to a large extent. The more reasonable the structure, the higher the firing temperature, and the porcelain will be more solid and durable.

Moreover, the sealing condition of the kiln can not only affect the temperature in the kiln, but also create an oxidizing or reducing firing atmosphere, affecting the color of the porcelain.

Therefore, the kiln is a measure of Su Bai thought for a long time before he knew how to draw the main symbol of porcelain craftsmanship.

"yes."Lu responded seriously.

Su Bai kept looking at the flames burning in the kiln, with blazing flames jumping in his black pupils.

His delicate face was shining with the orange-red light of the flames, except for a little In addition to looking forward to it, I am even more worried.

Because firing porcelain is not an easy task, and some will completely shatter during the firing process.

Even if it is completely fired, there will be cracks. Yes, the skin may even peel off. Of course, this skin is the glaze applied before burning the paper.

After more than half an hour, Su Bai estimated that the temperature in the kiln had reached 1,200 degrees Celsius. It was not accurate anyway. He had a measuring instrument, so he had to make a rough estimate.

He opened his mouth and ordered:"The temperature is ready. Send the porcelain in one by one for firing."

"yes. Lu immediately responded, placing the glazed earthen bowls on a wooden board, and then pushed them into the kiln little by little.

"The results of these crystallizations of mud and fire will be visible tomorrow."Su Bai said with a slight smile.

"Wu, do we really have to wait until tomorrow?"Lu Hong's eyes looked straight at the porcelain in the kiln.

Su Bai nodded lightly and ordered:"Take a good look at it. I will come back tomorrow to see the results."

"clear."Lu nodded and responded..........................................

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