Most ceramic factories have special gypsum molds, which only need to be placed in the mold, and the shape is quickly pressed out by rotating machinery and waiting for it to dry.

When Zhao Yunxiang was still a technical school student, he would work in a nearby factory during the summer vacation, and he had worked in a ceramic factory, so he had a good understanding of the production process of ceramics.

However, he has no molds here, and he has no special machinery, so he can only use his hands.

The dark red soil is very special, and there are basically not many impurities to be found, Zhao Yunxiang still pressed the soil into a thin cake with his fingers little by little, and then checked it.

The clay that makes up the pottery must not have impurities, and the larger gravel must be picked out, otherwise cracks will appear in the process of drying in the shade, and there will be signs of explosion after firing.

After some screening, a large amount of grit was screened out from a few catties of dark red clay, as well as more than a dozen earthworms.

Earthworms have been shown to be creatures that prefer to move in moist soils, and can be found even in these highly viscous clay soils.

The rest of the clay is being beaten and pressed by Zhao Yunxiang, which is to further make the clay more delicate and compact, thereby improving the quality of the pottery.

After a few minutes......

After several clay pots are made, these dark red clay is still very fragile and will be squeezed out with a little force, and the fragile clay mud needs to be dried in the next step.

The so-called shade drying is to slowly dry in a dark environment without contact with sunlight and dry air, which can effectively remove the moisture of the mud, and will not cause cracks and other signs of the mud due to the rapid loss of moisture.

The place where the shade was dry was a thatched hut, and this thatched hut was Han Xuening's residence, because she had been away from the tribe for a few days, this thatched hut was idle.

The mud was placed in the grass house to avoid sunlight, and Zhao Yunxiang left satisfied.

The drying time must be more than an hour, and he can't control the specific degree of dryness.

The construction of the kiln continued, and several primitive people were sweating profusely, because the sun was gradually rising, and there was a fire under the kiln, and the temperature around it was more than 40 degrees.

"If you can't stand it, replace it and drink water to cool off. Zhao Yunxiang cherished these laborers very much, and immediately commanded a few people to drink water under the tree, and he quickly made up for it.

The kiln was already half a meter high, and Zhao Yunxiang deliberately left an opening on the side of the kiln, because the kiln maker became narrower and narrower the higher he went, so as to maintain the temperature inside the kiln.

But it was necessary to leave a large opening, because the contents of the kiln were relatively large, just like the jars just now, which were half a meter high and 40 centimeters in diameter.

The opening left by Zhao Yunxiang is very large, it is a half-meter square opening, from which the mud that needs to be fired can be placed into it, because it does not have the ability to make door shafts, it can only be sealed with clay and stones when firing pottery for the time being.

"Or I can make a door hinge, fire it together, and when I take the pottery out, I can make a door hinge out of the pottery, so that I can make a dirt door that can be opened and closed. Zhao Yunxiang thought about it for a while, and then began to make the door shaft.

The so-called door shaft is carried out by the rotation of the bearing, and Zhao Yunxiang did not plan to make the bearing out of mud, but made two things similar to small saucers.

There is also a cylindrical clay stick with four strips of dirt extending from one side, and four strips of dirt intersecting with each other to form a grid.

These are the materials that make up the door shafts, the small plates that can fit in the upper and lower layers of the kiln opening, the cylindrical sticks stuck in the small saucers, and the dirt grids that extend to one side are the frames of the dirt doors.

With this frame, it is easy to cover it with earth.

The finished thing was placed on a few leaves, this soil grid was very fragile, Zhao Yunxiang simply didn't dry it, and carefully put it directly into the kiln and let it burn directly.

He didn't have much hope for this device, the grids were very fragile, and it was normal for cracks and fractures to occur, but it didn't matter, as long as the cylinder was fine.

Half an hour later, the kiln was finished!

The huge kiln was more than 2 meters high, and when he got to it, Zhao Yunxiang directly used the cone shape to build it and make the chimney of the kiln.

"Is this the kiln?" Lin Hao's face was flushed, and he was drinking the water from the cool bread tree.

"That's right, this is the kiln, after the burning of firewood, the temperature of the furnace has risen!" Zhao Yunxiang saw through the huge opening the fire snake gushing out of the crack of the stove.

The stove that Zhao Yunxiang had been worried about did not collapse, but became more and more hard after being burned by the flames.

As long as the temperature of the kiln reaches the standard, after a few hours of flame burning, the body of the furnace will become very hard, and even partially ceramic.

"How long will this take?" Lin Hao continued to ask, "Is there enough firewood we found?"

A lot of firewood is found, but it is still not enough to fire the kiln, mainly because the kiln is too large, and this kiln has to consume a lot of firewood.

The temperature after the firewood is burned, the highest is more than 800 degrees, which is barely up to the standard for firing pottery, but if you want to smelt metal, this is far from enough.

"Firewood is enough for the time being, you have to control the temperature and time when you fire pottery!" Zhao Yunxiang showed a smile, he had a clock to control the time, and the round clock on the ground could accurately mark each hour.

The kiln was almost fired, and the surface of the kiln was disturbed by the high temperature, and a layer of white cloud-like material appeared on the soil, which is the salinity of the seawater.

After all, the kiln itself is made of loess mixed with seawater, and after evaporating water at high temperatures, all that is left is saline.

Looking at these saline, Zhao Yunxiang fell into deep thought, "Maybe you can use the kiln to distill some seawater and get some sea salt to eat." ”

Salt is the most common and indispensable of condiments, and any food will become delicious as long as salt is added.

There was a lot of seawater brought by the tribesmen, all of which were packed in a huge wooden basin, and Zhao Yunxiang used the leaves as a container, poured the seawater into it, and then placed the leaves next to the kiln.

Now the kiln has completely heated up, and the surrounding temperature is as high as more than 50 degrees, which is completely enough to put the mud in and then heat up.

The slightly dried mud is put into the kiln, and then the opening of the kiln is sealed with mud and stones, so that the kiln is basically sealed and can heat up quickly.

After all this, Zhao Yunxiang deliberately looked at the clock, the current time is about 11 o'clock at noon, and the shadow of the wooden stick is very short, and it will be almost an hour to mark 12 o'clock.

"11 o'clock ......" Zhao Yunxiang touched his chin and thought, "6 hours, that is, around 5 o'clock in the afternoon, the kiln will be opened." ”。

Just as Zhao Yunxiang was muttering to himself, the tribesmen who were enjoying the shade under the tree began to shout, "It's King Kong, they're back!"

"King Kong?" Zhao Yunxiang was more familiar with this name, "Isn't it the first beauty of the tribe that Han Xuening said?"