Seeing the tin ore in the furnace, the speed of liquid transformation was so fast, Wang Hao suddenly thought that the melting point of tin was much lower than that of copper. Pen ~ fun ~ pavilion www.biquge.info

Because of the manpower, only one stove can be turned on in the village at a time.

Therefore, Wang Hao thought that if he came to practice tin ore first, preheated the furnace by the way, and then practiced copper ore, wouldn't it be a great saving of time and materials.

Thinking of this, Wang Hao counted the charcoal in Wang Long's hand and memorized it.

No kind of success is easy, and so is copper smelting. Although Wang Hao understood the principle, it was the first time he set out to do it. Therefore, it is natural to have bumps and bumps during the period.

What Wang Hao and they need to do is to write down the problems they encountered on the way one by one, and then find a way to deal with them, leaving a wider and smoother road for future generations.

The next day, it was another sunny day.

Last night, after a day of struggle, Wang Hao and the others finally refined the tin ore.

It was supposed to be smelted copper and tin overnight in a hot furnace to make alloy copper, but because Wang Hao didn't expect to refine copper and tin so quickly, there was no tool to prepare for pouring.

Wang Hao knew that there were several mature pouring methods on the earth a long time ago, but Wang Hao knew the most about the lost wax method.

Of course, all this came from when he was in college, when he went to a friend's small workshop specializing in making sword handles.

When it comes to the lost wax method, we have to say that the pre-technology of this method is wax.

This kind of wax can be used, whether it is paraffin wax extracted from petroleum, animal wax secreted by insects and bees, or vegetable wax extracted from plants and oils.

It's just that Wang Cun doesn't have these front-end technologies at present.

Although Wang Hao currently has a way to extract biowax from animal fat, the process is too cumbersome and takes a lot of time, so Wang Hao abandoned it.

But it's not impossible. The Great Wilderness is a magical place, with so many animals and plants that are not found on Earth.

In the Great Wilderness, if your clan asks you to collect some resin today, but he doesn't specify what resin to collect, then you are absolutely right to collect the resin secreted by the wax tree.

The wax tree is a tree that is very common in the wilderness, with a shape and leaves somewhat similar to the earth's locust tree, but with smoother bark and larger leaves.

True to its name, the wax tree is a tree that produces plant wax, and the liquid it secretes solidifies into wax in a few days when it sees the air.

Not only does the resin of the wax tree burn, but like paraffin, it melts when exposed to heat and is perfect for carving.

There are many ways to collect wax resins, except for those that are naturally secreted, Wang Hao and they chose the simplest method.

Before breakfast, Wang Hao took his people into the Black Forest.

On the outskirts of the Black Forest, the small trees had been uprooted by the giants, leaving only those towering ancient trees that even the giants could not shake.

The creatures of this area, from tigers and beasts to rabbits and poisonous snakes, were frightened by the power of the giants' demolition during this time, and they had long since moved to the interior of the Black Forest en masse.

The wax tree is not very tall compared to those giant trees that can easily reach hundreds of meters, even the wax trees that have grown for hundreds of years are only thirty or forty meters high.

But its dragon-like trunk, which requires several people to hug, is not easily shaken even by giants.

Stout only indicates how many years it has grown, but it does not change its density.

The hollow bamboo tube, which is ten centimeters long and the thickness of a little thumb, was easily inserted into the bark of the wax tree at the root of the wax tree by Wang Hao.

The bamboo tube tilted downward, and soon a drop of blue-white resin seeped out of it, condensed into a ball, and then dripped into the clay pot placed below.

A clansman followed Wang Hao's method in the same way, and then said to Wang Hao with bright eyes: "Hao, this method is so good, in the past, we could only climb to the top of the tree to find those that were condensed by ourselves, but now, we can directly draw it from the tree, and we don't have to work hard to climb the tree." ”

Wang Hao smiled and did not speak. These seemingly simple things, if no one takes the lead, often take a long, long time to be discovered and then spread.

If it was a small tree, these dozens of bamboo pipes that drew energy from it might make it suffer a lot of vitality, but for this ancient tree, there was no such worry at all.

The blue-white resin followed the bamboo pipe, stepped on a path they had never experienced before, and then at the end of the bamboo pipe, it condensed into a ball and dripped into the clay pot.

By the time Wang Hao and the others came again, a thin layer of liquid resin had already been collected under each clay pot.

The resin was evenly combined, and eventually, the five jars of resin were collected.

If this liquid resin is a normal reaction, it will take about three days to condense into tree wax. However, Wang Hao has his own way to deal with this.

Add a small amount of water to the resin, then stir well and bake on the fire.

When the inside of the jar is no longer bubbling and the resin has turned into a slightly cloudy liquid like egg whites, this is all done.

If the temperature is too high, sink it into the water and let it cool down quickly.

When it solidifies, it will not melt into water.

When the wax has solidified, it's time to carve the wax into the shape of the object you need to cast.

However, in the face of this step, Wang Hao scratched his head a little.

When he was in school, Wang Hao's art was very good, but only the carving couldn't pass the test no matter what.

Maybe he had in mind that he wanted to carve out a tiger, but the result would definitely be a sick cat.

Because of the characteristics of the lost wax method and the shortcomings of existing tools, it is difficult to make something too fine with the current technology.

After thinking about it, Wang Hao finally decided that this batch of smelted bronzes would be used to make farm tools.

Like a shovel, Wang Hao can't make things that have high requirements for craftsmanship and too thin planes, but simple things like hoes, hammers, and axes are still no problem.

Each jar of wood wax was cut into four parts and divided among the four clansmen to carve. As for what they want to carve, it's up to them to choose.

This kind of behavior is undoubtedly very wasteful, and there will be a lot of waste, which needs to be heated and solidified again. The improved method Wang Hao decided to explore slowly in the future, and now all he wants is to be able to see the finished product come out quickly.

In the end, a bunch of wax tools with different styles, rough shapes, and exaggerated appearances appeared in Wang Hao's hands.

A few of them were completely indistinguishable in shape, and even if they were poured out, the wax sculptures that were useless were picked out and melted, and the rest were soaked in gypsum water by Wang Hao.

The gypsum stones on the Great Wilderness, like the earth, belong to things that can be seen everywhere. On the hill across the river, you can always bring back a car if you want.

It is ground into powder, then melted with water and stirred well, and it becomes a white and viscous liquid like soy milk.

After soaking various tools made of tree wax, they are taken out, and the surface is stained with a layer of slimy gypsum powder.

This is not the end, after taking out the tree wax tool, Wang Hao sprinkled gypsum powder on it again.

Because of the water, the plaster is sticky and cannot come down if it sticks to it.

Eventually, each tool carved from wood wax was wrapped in a thick layer of plaster powder until a plaster ball was formed, whose original shape was invisible.

By the time all this was done, it was almost time for lunch.

By placing these slightly damp gypsum balls on a bluestone slab and exposing them to the sun, Wang Hao believes that by mid-noon, the plaster balls will be dry.

Last night, the stove went out because the materials were not prepared in advance. Since it is going to be poured at night, it is natural to open the furnace in advance to heat the furnace, and if you wait until these gypsum balls are completely dry before opening the furnace, who knows when the copper ingots will be melted off. (To be continued.) )