After the shoulder was almost recovered, Wang Lang asked people to build the copper smelting furnace according to their own ideas.

While others were busy living in the mud, Wang Lang put the copper ore into the pottery kiln and calcined it with a carbon fire, and after a day of hard work, Wang Lang got a total of about 30 catties of pure copper, seeing these copper pieces, the first step of Wang Lang's plan has been successful.

These copper ingots of various sizes were pitted on the surface, and Wang Lang planned to make them into saws and nails.

If you want to make a regular mold, a flat plank is very important, and no one in the tribe can make a very regular shape with their bare hands.

Over the next two or three days, Wang Lang asked others to smelt the copper ore, carefully carving the shapes of saws and nails on clay tablets with tiny branches.

Since there was no ruler, Wang Lang repeated it many times before making some molds that could still be seen.

After drying the abrasives, Wang Lang carefully moved them to the copper stove.

Since there are still some tin in the tribe, Wang Lang plans to make bronze directly, skip the brass age, and stride into the bronze age.

The preparations have been completed, and it is up to us whether the world's first bronze can be made.

Copper smelting has reached the most critical stage, and after carrying a few baskets of charcoal, everyone gathers around the copper furnace, waiting to witness the birth of this first bronze.

Wang Lang didn't know what the optimal copper-tin ratio was for bronzes, but because there was relatively little tin in the tribe at present, Wang Lang had to use more copper when he added material to the furnace.

As the wood inside the fire pit ignited, the roof of the stove was closed, and people could not see what was going on inside the stove.

Wang Lang held the wide leaves of the palm and kept fanning the wind into the fire pit, and as the temperature of the furnace continued to rise, the onlookers who were roasted by the boiling heat had to take a few steps back.

Because there is no blower equipment, it is all dependent on manpower to supply air to the fire pit, which is a very physical test, and it didn't take long for Wang Lang to be sweating profusely, and doing such a thing in this hot weather is definitely a very torturous thing.

In order to avoid people from heat stroke, Wang Lang asked the women to prepare a large amount of salt water to replenish water and salt for people who were over-consumed.

After more than an hour of waiting, a red liquid slowly flowed out of the groove on the furnace wall, and Wang Lang quickly put the pre-fired clay pot under the groove.

When the copper furnace stopped flowing copper juice, Wang Lang asked people to extinguish the copper furnace, put several layers of animal skins on the clay pot, held the clay pot, and slowly poured the copper juice into the prepared mold.

After filling the grooves of the saw mold, there was still a lot of copper juice left in the clay pot, and Wang Lang poured the rest into the nail mold.

The previous steps are complicated, but at this point, people already know what to do next, and people have experience in smelting tin before.

Just pour the melted liquid into the mold, the rest is to wait, take it out after the melt has cooled, and the rest is grinding.

But people don't know what these strange-shaped molds made by Wang Lang are used for, so they can only endure the curiosity in their hearts and wait for the moment when the mystery is revealed.

As the molten copper slowly cools and solidifies, the tools in the mold gradually take shape, and the pale gold bronze in the mold attracts everyone's attention, shining dazzlingly in the sunlight, which is very beautiful.

The original color of bronze is yellow, and the reason why the bronzes unearthed in later generations are cyan is only because of the long-term oxidation that has covered the surface of the bronze with a layer of patina.

Wang Lang looked at the bright and blind saw, and almost saw it as gold.

"Which SB directors in the TV series misled the masses and said that it was bronze if they made a blue-black thing, and the bronze with tin in front of them was more yellow than gold." Wang Lang despised those shoddy TV series fiercely in his heart.

After the bronze ware had cooled down for a while, Wang Lang used the water-soaked animal skin to put the mold into a water-filled soil pit.

The copper that seems to have cooled down is actually extremely hot, and the moment it is put into the water, the water in the pit boils almost instantly, and after doing this, Wang Lang laughed happily: "The Bronze Age has finally come." ”

At night, Wang Lang couldn't wait to take out the cooled bronze from the pit, and after removing the clay mold, a pale golden bronze appeared in front of Wang Lang.

People looked at this strange thing and asked curiously, "Lang, what is this?" ”

Wang Lang smiled and said, "This is called a saw, which is used to cut wood. ”

"Doesn't an axe cut wood just as well? What's the use of this thing? The people asked, confused.

Wang Lang smiled without saying a word, asked someone to take a piece of wood over, and said, "You have a good look." ”

The performance of the bronze saw soon shocked the others, and people could hardly believe their eyes as they looked at the flat cross-section of the wood.

It usually takes a long time to cut down a small tree the size of an arm, but with this thing it can be sawed off almost in the blink of an eye.

"Lang, this thing is too godly." Huo stared at the copper saw in Wang Lang's hand and said with a glint in his eyes.

Although this copper saw can be called a divine object in the eyes of others, Wang Lang looked at the cracks on the sawtooth, and shook his head helplessly, this bronze is hard, but it is too brittle.

Wang Lang knew that this might be caused by the copper-tin ratio, but he didn't know the optimal ratio, so he could only experiment little by little.

While this first bronze isn't perfect, it's still an exciting thing.

Looking at the excited fire, Wang Lang shook the saw in his hand and said, "How about it, now you know how powerful this thing is!" ”

Huo nodded again and again, and said: "Amazing, it looks much better than an axe, with this thing we can cut down all the trees we see!" ”

Hearing this, Wang Lang couldn't help but be stunned, cut down all the trees, what kind of joke, just with this broken saw in his hand, he couldn't do it to exhaust everyone, and this idea was very unenvironmentally friendly, although Wang Lang himself had a history of arson, but he still despised the evil thoughts of forest fires.

"If you want to cut down all the trees, you can't use this saw, this saw is just a failure, you have to melt it down and redo it!"

"Why did you redo it, it's already very powerful now!" People asked, puzzled.

Wang Lang didn't speak, but took a stone and smashed it against the copper saw.

There was a crisp sound of "pop", and the copper saw broke in response.

The people who watched this scene were in pain, and such a good thing was smashed no matter how they said it.

Wang Lang took the copper saw that was broken in two and said, "This thing is still too brittle, and we have to try a few more times until it works." ”