The cave kiln is a cave with a depth of one meter, a width of one and a half meters, and a height of one meter on the soil slope next to the ash kiln. Two holes were dug above the cave with the help of bamboo, which were used for observation and fuel delivery. The entrance of the cave is closed with a stone during the firing, and a layer of mud is pasted on the outside to do a good job of sealing and insulation.

Ding Qi carried two large baskets of charcoal out of the wooden shed that was temporarily built next to him to stack charcoal and pottery, first laid a thick layer of charcoal at the bottom of the cave, and then put the pottery products on it, and did not put any pottery products under the two holes, and then piled up charcoal around it, and the kiln could be opened after two days of burning. On three sides of the kiln wall, thirty mud bricks were piled up in the last two days, and Ding Qi took advantage of the pottery to burn them together to see how the effect was.

The pottery put into the cave kiln is a relatively large clay pot and clay pot, and there is also a clay pot. The clay pot is not large, the diameter is about 20 centimeters, the depth is 10 centimeters, it is relatively thick, and the whole is glazed with grass and wood gray. He made this clay pot mainly to see if the quality of these pottery could withstand the burning of firewood, and whether it would be damaged after a period of use. In the future, if he wants to integrate into the life of primitive people, these skills are his ability to settle down. Other clay pots and clay pots are mainly used to store items, which can be moisture-proof and waterproof, so that there is nowhere to put the collected things.

These pottery are all made of earth that is five to two meters deep, which is of better quality than loess, but not as good as real clay, which is between clay and clay. After sifting, removing impurities, and refining mud, the quality is not too bad from clay.

Lighting a piece of firewood and stuffing it into the depths of the kiln, the charcoal burns from the inside out, and the rapidly rising temperature forms a heat wave that drives out all the cold air inside, and the temperature of the kiln also rises rapidly.

Ding Qi blocked the entrance of the cave with a stone, leaving only a small opening, took out a blow torch, twitched the push rod, and kept pumping air into the cave, and the charcoal burning surface and people inside also expanded rapidly, until the entire cave was filled with red fire.

After another ten minutes of continuous air infusion, Ding Qi shook his somewhat sore arm and sealed the small hole with mud, and the outside of the stone was also smeared with a thick layer of mud. The two holes in the cave are also covered with two stone slabs, leaving only a gap for the exhaust gases from combustion to escape from here.

Next, Ding Qi went to check the progress of the pottery every three hours, added some charcoal to it, to ensure that the temperature in the kiln was not too low, and after 24 hours of continuous burning, there was no need to add charcoal, just wait for the temperature in the kiln to drop down to know the final result.

When he wasn't firing pottery, Ding Qi began to do other odd things. After feeding the rabbits and pheasants in the cages some grass, Tinch took the shovel and went southwest of the hut, near the sheepfold, to dig a pit.

The pit was one meter deep, one meter long and one meter wide, and on the side facing the sheepfold, a twenty-centimeter-wide pit was dug diagonally downward. Ding Qi put his feet on both sides of the tunnel, squatted down and felt it for a while, and he expressed his great satisfaction with the work.

That's right, Dingch dug a toilet, called a dry toilet to be exact.

"Well, yes, no more running around to solve the problem of going to the toilet. After the bricks are burned, they are spread in the tunnel, and they are not afraid that the tunnel will be washed away by urine. Little cutie, you're going to come here when you and pee in the future! ”

After looking at the structure of the entire toilet, Ding Qi turned his head and said to the little cutie who was lying on the side and staring at him curiously. However, looking at the cutie, he was not interested in this thing made by Ding Qi, because after Ding Qi finished speaking, he ran to a big tree next to him and took a nap on a thick branch.

Ding Qi could only shake his head helplessly, and while walking towards the ash kiln, he thought about his next plan.

After adding charcoal, Ding Qi turned back to the toilet and built a simple rainproof wooden shed along both sides of the tunnel, with a length and width of one meter, and the four walls were pinned with bamboo pieces to form a wall on three bamboo boards, and the door was also constructed, tied to a shed pillar to easily push and pull.

The wooden shed was simple, even rudimentary, but Ding Qi was very satisfied.

Two days later, Ding Qi came to the ash kiln and touched the temperature of the ash kiln and the cave kiln, which had cooled down. Ding Qi removed the stone slab from the ash kiln and looked at the condition inside. It's a pity that there is only the ashes of the charcoal, and you can't see the pottery inside. Ding Qi had no choice but to put his hand into the ash, and after feeling the temperature in the ash again, the tips of his fingers touched a hard object.

Gently grasp it with your hand and raise it up, is a pottery cup. After taking it five or six times in a row, all the pottery in the ash kiln was taken out, namely two pottery bowls, a pottery pot, two pottery cups, and a long-handled pottery drain.

Blowing the ash off the top, inspecting it carefully and tapping it lightly, it was found that there was a crack in the wall of one of the clay cups, which was burned out.

The pottery was brought to the water's edge to be cleaned, and the true appearance of the pottery appeared in front of Ding Qi. There is some vitreous luster on it, the wall surface is smooth, scattered with some fiber particles, and the whole is tan, and there is a quaint beauty on it.

It may be because of the abundance of materials, these pottery are very strong, and they are a little rough in the hand, but they give Ding Qi a very stable feeling.

After putting the pottery aside to dry naturally, Ding Qi went to the cave kiln and gently removed the mud shells and stones on the outside, revealing the pottery inside.

The first feeling that came into his eyes, Ding Qi was very happy in his heart, it should be all successfully fired. But after a closer look, a clay pot in the corner was broken, which made Ding Qi feel a sense of loss in his heart.

After taking it all out, Ding Qi wiped all the ash off it with a piece of rabbit skin, revealing the true face of the pottery. The appearance is a little rough and covered with fine particles, which should be related to the grass and wood ash glaze, and there is no reason to remove the impurities inside.

The color of these pottery is darker than that fired in the ash kiln, and the metallic luster is stronger. The mouth of the clay pot is relatively rough without glazing, with some small holes, just like the edge of the water tank used in the countryside before; The inner clay wall is more delicate than the mouth of the clay pot, with a vitreous luster.

And the clay pot is even more satisfying to Ding Qi, and there is no flaw in the fire, it depends on whether it can withstand the high temperature boiling in the future.

Finally, Tinch tossed the shattered clay jar aside and removed the bricks inside. It didn't exceed his expectations, it was thick, and there was no big change before putting it in, except for the color, what Ding Qi burned out was red bricks. Holding the two bricks in your hand and slapping them together, the sound is relatively brittle, not broken, very strong, and the quality should be assured.

After moving all the pottery to the creek and washing it, Tinch carried it all back to the hut one by one, and put it in to dry the food and the like. And one of the clay jars was used by Ding Qi as a water tank, and the water storage bucket made of oil drums always felt a smell of gasoline and rust.

In the evening, Ding Qi stewed a pheasant caught in the morning in a clay pot, and the thick chicken soup flavor always felt stronger than that made by the hanging pot. After drinking the chicken soup, the little cutie directly threw the chicken offal and the like aside, looked at Ding Qi with pitiful eyes, and put on a hunger strike if you don't give me food, which made him speechless. I had to give it half a chicken from the pot, and half a pot of chicken soup to satisfy the little cutie's appetite.