Metalworking is an extremely ancient craft whose origins predate even recorded history.
Until thousands of years ago, humans had almost no knowledge of iron, the most abundant metallic element on earth.
Both the ancient Egyptians and the ancient Sumerians believed that iron could only come from meteors and was a gift from the gods in heaven.
Although later civilizations discovered ways to smelt iron and entered the so-called Iron Age, they still did not know how to stably obtain iron tools that were strong and not easily brittle.
But iron is too fragile, soft and not sharp, and is far less useful than copper.
Until a great nation discovered steel, they used the hammers in their hands to sweat and blood over and over again to forge stable enough steel.
This piece of black metal has finally officially become the protagonist.
But its production is too expensive and too rare. From mining to transporting ore to smelting and forging, every iron sword consumes countless manpower and material resources.
Finally, during the Industrial Revolution era, people finally discovered how to obtain tough, durable and even cheap iron.
Nowadays, high-quality steel can be found everywhere, in high-rise buildings, cars and ships, railways and trains, bridges and towers. For less than two pieces, you can get a pound of iron in a scrap factory.
Black metal completes the transformation from mysterious to ordinary.
Human beings have long since faded away from the mystery of iron and have become accustomed to it. The steel industry has become a wonder of the new era.
The majestic blast furnaces are several stories high and operate 24 hours a day. The temperature can reach thousands of degrees Celsius. No living things or moisture can survive in the hot molten iron, which requires the concerted efforts of many engineering personnel.
The entire steel plant is like a giant monster that is never satisfied, devouring ore, coal and lime.
The products produced by modern steel plants are of high quality and stable quality, enough to be regarded as a miracle by the ancients: only with the help of gods, craftsmen can occasionally achieve superb works.
Now, everyone has forgotten that the history of the development of black metal was still hard-won even half a century ago.
Until this moment, a man, an almost naked man, in the most primitive and savage rainforest, using soil and stones from scratch, completed something that can be called a miracle, which makes people think about it again
stand up.
Oh, it turns out that this is how the original iron and steel were made.
He refined iron, turned it into more stable steel, and turned steel into a sharp blade.
He is an adventurer, a nature lover, and a man full of madness at heart.
In front of an audience of more than 10 million people, this process of condensing the progress of human history was completed.
At this moment, six million spectators watched and shouted and screamed wildly. They responded to this moment with the most excitement.
[Ao Jing presented a yacht to the anchor*1—Fang Shen is awesome! Human beings are awesome!]
[Holy shit, when will Langya be able to post pictures again? 】
[No, you just sketched it out in your own mind, hahahaha]
[Prince Mu gave the anchor spaceship*10 - it can be used as a store treasure]
[It’s you! Yao Jun, you’re a profiteer! I spent 300 yuan to buy bamboo, but I didn’t succeed in making a fire even once, wuwuwuwu]
[Mr. Yao is a damn genius in some aspects. Every time I buy something, I feel like a big bastard, you evil-minded maggot!]
[Profiteer! Evil businessman! Black businessman! (Ma Chao's third consecutive series)]
What happened to Yao Jun that everyone is so resentful?
Bi Fang looked confused, but he believed that Yao Jun would not mess around with the club.
The scalding hot sand distorts the heat.
Subtle changes are taking place at the macroscopic level, with the grains becoming finer, denser and tighter, like twisted tendons.
It would be a good knife.
Bi Fang collapsed on the ground, closed his eyes and enjoyed the moment.
Finally succeeded.
Next, just install the handle, polish it, and you'll have a finished dagger.
A steel knife.
A sharp blade that has a higher degree of completion than the iron knife required by the system.
Gradually, the snoring began.
The audience was stunned. At first they thought it was some strange sound, but after a while they realized it was coming from the microphone and saw Bifang with his eyes closed and looking up to the sky.
Only then did everyone remember that in order to catch up with the progress, Bi Fang had not had adequate rest for several days in a row. Last night, he stayed up all night and worked hard all night. Coupled with the intense physical exertion, he was extremely exhausted and it was difficult to relax.
Suddenly, he fell asleep directly.
[I’m sorry, did you fall asleep?]
[I can’t help but sleep now, the helicopter will be here in three or four hours]
【Damn, get up quickly】
...
[Lao Fang, get up quickly, it’s past five o’clock]
Gu Mao
【It's six o'clock!】
【The helicopter is coming】
Under the setting sun, the audience kept shouting, but Bifang had already fallen into a dream.
A moment later, a helicopter flew over, and the electronic sound that had been missing for a month sounded again.
[Ding, the main task three failed and the completion degree is low.]
"Um?"
Bi Fang woke up suddenly, sat up dazedly, and then covered his swollen head.
It hurts so much.
It was as if magma was flowing in the narrow cerebral blood vessels, scalding the thin blood vessels, flowing into the brain, and finally cracking and rubbing along the skull seams bit by bit, and turned into coke under high temperature.
Thinking of the nightmare he had just had, Bi Fang opened his eyelids hard and tried to close them, and asked the audience how long he had been asleep.
[Just over half an hour, it’s early three o’clock now and it’s not even four o’clock yet.]
"Phew, I'm sorry, I was too sleepy. I fell asleep as soon as I relaxed a little."
Bi Fang stood up, took a few deep breaths, and finally bent down and touched his toes. He stood up after about ten seconds. He was obviously more energetic when he stood up again.
But the fatigue is still there, just not as sleepy.
"If you are sleepy and want to wake up quickly, you can try the action I just did. When your head is lowered, blood will be concentrated in the brain in a short time, allowing the brain to get a lot of oxygen and nutrients.
, so that the brain becomes active again.”
"Before doing it, you can also use deep breathing to temporarily increase the oxygen content of the blood. It has a miraculous effect. When I was sleepy in class, I would 'accidentally' drop the pen under the table, and then bend down to pick it up for ten seconds."
[I was sleeping when I was sleepy in class, and Lao Fang was picking up pens when he was sleepy. No wonder I can’t understand anything even after watching a live broadcast, and Lao Fang is getting better and better]
【Hahaha, so true】
[What to do in the office]
"There is also a way to do it in the office. You can straighten your back, raise your feet flat, and tighten them."
Bi Fang sat on a rock, and his overall movements were like a sit-up and he paused halfway through. His abdominal muscles were tight, and the serratus anterior muscles on his ribs undulated like shark gills.
"Many people will feel sore after holding on for more than ten seconds. In short, it is quite tiring. The principle of this movement is that when the muscles are active, your sympathetic nerves will be excited, activating the 'hypothalamic-pituitary-adrenaline' system and secreting adrenaline.
Take the initiative to inject chicken blood into your body.”
Half a minute later, after completing two sets of movements, Bi Fang felt refreshed and energetic. He came to the blast furnace, removed the stones, and stirred the hot sand with branches.
After half an hour of cooling, the hot sand is no longer hot to the touch.
[By the way, where did Lao Fang get this sand...]
[Damn, I also discovered it, where does the sand in the rain forest come from?]
"Where there is soil, it is not easy to get sand? Just understand the principle of soil desertification."
Break up the protective vegetation, fallen leaves, crusts, etc. on the soil surface. The exposed soil will dry out quickly under the influence of sunlight and monsoons, and the original aggregate structure will be destroyed and the adhesion effect will be lost.
Nutrients such as fine particles will be carried away by wind or precipitation, while non-nutritional coarse particles remain, forming desertification.
"What can be done by natural air drying can be done faster artificially. Just remove the dead branches, leaves and stones from the soil, keep heating, rinsing, and reheating, and you can get soil like crushed sand."
Bi Fang poked the dagger with a branch and fished it out.
After shaking off the sand on it, the steel dagger finally showed its full appearance.
But......
It's not pretty.
It is not as cold as the audience imagined, and the light can detect people, but it is pitch black, and it can also reflect blue light in the sun...
Bi Fang didn't care. It was like this right after it was processed. After polishing, it was shiny.
He took out a polished log, cut it in half evenly, and then stamped it on the thin handle of the dagger. After making the mark, he picked up the dagger and cut on the mark, making a groove in each cut that could accommodate the thin handle.
The two logs are constantly closed. When the size is suitable and can be stuffed in without being too loose, the collected rubber resin, that is, latex, is applied on them.
"Natural latex has a very good viscosity after it dries naturally. If conditions permit, it can be vulcanized, which will make the viscosity even higher. But I don't have enough time, so I need to install the wooden handle as soon as possible."
Glue two semicircular logs together and wait for them to dry and stick firmly. Bi Fang took out the stone dagger and quickly carved the handle into an oval curve. After making a rough shape, he took out the smooth raw stone and rubbed it.
Polish the burrs on the wood smooth and even.
The last step is to evenly wrap the slender rattan around the wooden handle, fix it twice, and put it into the latex for final adhesion.
The vines wrapped around the wooden handle, spitting out six black blades, and the tip shone with a little cold light.
Now, all the work is completed and the dagger is completely formed.
Bi Fang looked at the shelter and blast furnace behind him, and the past twenty-one days flashed through his mind. Finally, he held a cautious stone hammer and stood down and stared at it for a long time.
Finally, it hit the chimney, and cracks spread like a spider web.
The crack gradually spread, turned into a crack, and broke suddenly. The three-meter-high chimney dropped to the ground, shaking the earth.
The water monitor lizard trembled slightly, quickly got down from the tree, got into the cave, and hid in the deepest part.