Chapter 13: Making the Kiln (I)
In general, Wu Yicai's bowl was not very successful, he should have thought that he was only using clay, not clay for porcelain burning......
The temperature of the fire is not stable enough, and it is impossible to completely crystallize the clay by firing.
The fired bowl is not a common white porcelain bowl, its texture is very similar to the red tiles on the top of rural houses, but the color of the bowl is gray-black!
This is supposed to be not porcelain, but pottery......
And the texture of the bowl is not the same as the whole, only a small part of the bottom of the bowl has formed pottery, and the other parts are still in the form of clay, and there are some cracks, edges and even depressions!
Sure enough, it was impossible to burn pottery by burning the clay in this way, and the overall temperature of the fire was uneven, and it was impossible to crystallize the clay at all.
Wu Yicai remembered that the temperature of firing pottery must reach more than 700 degrees, and it must be fired at the overall temperature to complete the pottery.
When he was working as a summer worker, he also installed a furnace in a ceramic factory, and the maximum temperature of the kiln was 1700 degrees, and the dried mud blank was put into the furnace and burned for a few hours to be baked, and the mud bowl also became a porcelain bowl!
Fortunately, Wu Yicai had worked in a ceramic factory before, otherwise he really didn't know these details!
If he wants to burn pottery, he must have a kiln, which is basically sealed, so that the overall temperature inside the kiln can be perfectly guaranteed!
When I used to watch survival programs, I saw an Australian guy who was against the sky, and he built all kinds of things with his bare hands, including building a kiln out of clay and firing tiles......
I remember that he was impressed by the powerful skills of the Australian brother at that time, but he didn't expect to be on a desert island now, in order to survive, he also followed the example of the Australian brother who defended the sky!
The construction of the kiln is very simple, dig a trench in the ground, burn firewood under the trench to provide heat, build a soil slab with soil on the top of the ravine, and make some thumb-thick holes according to the order of the nine-square grid, so that the flames in the gully will come up directly through the holes, forming a wide and uniform fire field.
Wu Yicai remembered that he first let the fire burn the earthen slabs for a while, burned the clay slabs as much as possible to dry and set, and then waited until the flames came up stably and evenly from the holes in the nine-square grid, and then built the outer wall of the kiln, and finally built the lid of the kiln!
It's better to eat first, and only when you're full will you have the strength to work!
After eating two sweet papayas, he realized that the papayas he had bought from the supermarket before were not comparable to those here......
The papaya picked by Wu Yicai is not simply sweet, but sweet with a hint of coolness and sweetness, and the most important thing is that it is very juicy! It's fresh!
The papaya was so delicious that he even ate the skin......
However, it turns out that the skin of papaya should not be eaten, it is like chewing wax......
After he had eaten enough, he began to build the kiln, and the time was short, and he had to build the kiln as soon as possible......
Wu Yicai found a very hard wooden stick and began to dig the soil, to dig a place to burn firewood first!
The sand on the ground is difficult to dig up, and it took him a long time to dig up the soil, and the soil is a little wet, it should be the heavy rain that day, and the moisture has been well retained!
He dug a square pit, the depth was about ten centimeters, and its length was about 60 centimeters, which was also prepared for him to burn something else in the future, the bigger the kiln, the better!
He and some mud were ready to start building the earthen slabs on the fire, which were square nine-square grids......
Ten minutes later, he finally finished it! This earthen slab has a total of thirty-six holes, and the thickness is about five centimeters, which is very strong and will not be crushed by the clay that needs to be fired!
The diameter of the hole is about two centimeters, and the inner ring is very round and smooth, and the flame should pass through the hole smoothly!
I moved the fire, picked up a lot of dry wood, and prepared to burn the clay slabs dry, only after the slabs were dried and fixed and formed, we could continue to build the next step!
Finally, when Wu Yicai's tears were choked by the smoke, the fire slowly burned.
"Rustle...... Click! ”
There's some movement in the jungle, he's sure! Something must have stepped on a leaf and broken a branch!
"Who?" Wu Yicai frowned and looked nervously at the source of the voice.
He jumped to his feet as he quickly picked up the spear on the ground, nervous not knowing what would be spying on him again.
He clenched the spear, his arm trembling unconsciously, and he helplessly found that he had even taken the spear backwards, probably because he was overly nervous.
Wu Yicai anxiously searched the deep jungle with his eyes, all he saw were some rugged tree trunks and strange vines, but he didn't find any animals, but he always felt that something was watching him......
He knew that he couldn't sit still like this, he needed to strike first, he had to strike first!
He picked up a stone and threw it at the dim forest, making a loud noise as it sliced through the leaves and vines.
"Rub~!"
The creature in the jungle must have heard the sound of the stones, probably frightened, and turned and fled deeper into the forest.
He searched for the sound and looked towards the dense forest, only to see a vague black shadow, it should not be very large, but it was surprisingly fast.
What kind of creature is that?
Looks like a canine!
It could run so fast in such a difficult dense forest, it seemed to be familiar with the terrain here, and it disappeared in the blink of an eye.
Wu Yicai didn't catch up, not to mention the dim and difficult dense forest, he didn't know whether this canine-like creature lived in groups or just like that, what were their habits? Is it a carnivore......
Perhaps its escape may have been a trap to lure him, and when he chased it, they would all surround him, and he would not be able to cast it in the dense jungle, let alone use his spear as he would like!
Thinking about it, it's better to stay here, it's empty and flat, the view is wide, and more importantly, he has fire, and he believes that any wild animal will be afraid of fire!
Fire is the foundation of his existence, and it is also the solace in his frightened and restless heart......
Not staring at the dense forest, let alone looking for the unknown creature, Wu Yicai observed the fire under the kiln, I don't know why, the fire in the fire just can't burn, the fire is very small, and there is a lot of smoke.
Maybe the hole he dug was too damp, and he had to wait for the fire to dry a little, and now he had to hurry to the next step!
Well... Prepare some soil first, you will need a lot of soil later, and you need to use more fine soil to make some clay bowl mud, of course, the more delicate this mud, the better, preferably mud without impurities.
Wu Yicai used a few huge leaves as a tray to transport some soil from the periphery of the dense forest, and if he wanted to take the soil here, he needed to remove the thick fallen leaves, the soil had a musty smell, and there were a lot of red earthworms in it, and it was a lot of ......
Maybe most people will be afraid of these red striped worms that are entangled, but Wu Yicai is not afraid of these, the reason why he is not afraid of these may have something to do with his growth environment!
Wu Yicai is a rural baby, and his favorite thing to do since he was a child is to detain shrimp and catch crabs, and often use this red earthworm to fish!
He still remembers that it was a dry canal in their village, and this red earthworm could be caught in some damp places, and it was a big handful, and it could be used for fishing for a day!
……
After several trips back and forth, he brought a lot of mud, at least about 70 catties, it is estimated that a large kiln can be built, and his ideal kiln is a large kiln that can fire urns!
As long as there is a kiln, he can burn what he wants, even tiles, and if he can make a house made by an Australian brother, he will not have to be afraid of rain in the future!
……
It is gratifying that the fire in the fire pit has gradually become larger, and the color of the clay tablets has changed from black and gray to gray and white.
He added some more firewood to keep the flame burning, and he had to make some fine clay to make the clay bowls and pots, and he searched around and finally found a relatively flat stone, which was very heavy, and it took him a long time to get it from the sand stall in the distance......
Wu Yicai tried his best to select some yellow-looking, delicate and soft soil, kneaded the soil vigorously, took out some gravel and small stones inside, and then grabbed a handful, about the size of a walnut, and then repeatedly smashed it with stones, which can effectively remove the residual impurities in the soil.
Removing impurities is very important, in the process of firing pottery, the mud blank from the form of the soil through high temperature baking into a crystalline form, if there are some gravel impurities in the soil, it is likely to crack directly from the place of impurities, resulting in the failure of pottery firing!