"Seventh Master, I said why did you leave again, let's build a brick house. 5 money a brick, he will go and grab it. Let's not buy him, let's burn it ourselves, how about it? Besides, with Uncle Dazhu as an expert, what are you afraid of? ”

Li Feng was indeed taken aback by the price of this brick, and he didn't come back to his senses for a long time. You know, in that era, a brick was about 3 cents. In this year, a brick is 5 yuan, a stone of grain, in exchange for about 20 bricks. At this time, Li Feng also remembered that this burning brick is not complicated, and you can burn it yourself if you don't buy it.

Although Li Feng didn't know how this green brick was made, he still knew something about this red brick. It's not complicated to fire.

"Hey, I said you kid, why are you just such a tendon. You think this brick burning is as easy as burning lime. The charcoal consumed alone can be piled up into a mountain. Moreover, there are so many bricks to be used to build houses in the village, and I don't know if I want to get them until the Year of the Monkey. Forget it, today's old man, I'll tell you how to get this burnt brick. lest you remain hot-headed and cranky. ”

Hearing that Li Feng was still not giving up, the Seventh Master could only start to sit down and roughly tell Li Feng how this brick was burned.

However, after Li Feng listened to the words of the seventh master, he finally understood why this green brick was so expensive. The main reason is that this thing is actually made of charcoal.

This thing is no better than burning lime, and the temperature requirements for burning lime are not high, so you can just use wood to make a large fire. Besides, this thing can't be like burning lime, and everyone can also make a small fire. It doesn't matter if it's hot or cold. That would have cracked the bricks. Therefore, in this era, charcoal is used to burn green bricks.

There is also a process of burning green bricks, which is much more complicated than burning red bricks. In the end, it is necessary to release water and rely on water vapor to cool it. Instead of natural cooling, as in the case of red bricks. And so it goes. The output of each kiln is very low.

The process is high, the process is complex, and the production capacity is low, which makes the price of green bricks so scary.

"Hehe, it's fine. Seventh Master, I have a way. I have a method of burning bricks here, which can be fired in large quantities into very inexpensive bricks. However, it's not green bricks, it's red bricks."

The firing process of red bricks is much simpler than that of green bricks. Inside the village. Zhao Dazhu is also an expert in this area. Therefore, Li Feng is 100% confident that he can get this red brick out.

"Red bricks? I've never heard of this. Kindness. What do you brat say, you can burn another brick? Moreover, the ratio is much lower than the green brick, I heard it right. That's right. Can you tell me about this so-called red brick. Is there a green brick that is strong, and how much does it cost to burn a red brick? ”

The seventh master was stunned at first, with an incredible look on his face. If someone else said such a thing, he would definitely not care about it. However, when these words came out of Li Feng's mouth, it was different. For Li Feng, there are endless new ideas and new gadgets, and the seventh master has a deep understanding.

Soon, the Seventh Master's expression became even more excited. If you can really burn bricks that are about as strong as green bricks, and the yield is still very low, then this is a problem. As for the large number of quantities that Li Feng said, he directly ignored the seventh master. A small batch is enough for his old man to be happy.

"Well, well, what the specifics are, I won't know until I get it out. However, I think, even if it is worse than green bricks, it must not be much worse. As for this achievement, it must be much lower than the green brick. But before we can do that, we need to get something very important."

When Li Feng heard this, he was really hard to say, and he hadn't compared green bricks with red bricks. Besides, although the bricks can be fired, the soil quality is different, the proportion of raw materials is different, the temperature and other reasons can also lead to the quality of the burned bricks. Only after burning it out and experimenting with it, did I know.

"Okay, okay, you say quickly, what do you need, look at the old man, do you know"

As soon as the seventh master heard this, sure enough, there was a door, and his heart suddenly became overjoyed, and then he began to urge Li Feng to see what he needed to find.

"Well, I don't know if the Seventh Master, have you heard of coal."

When Li Feng heard it, yes, this old man, he was well-informed, so he told the seventh master what he was looking for. Isn't it stupid to use charcoal to burn bricks. That's not burning bricks, it's burning money. If you find coal, that's easy.

Li Feng thought to himself, the location of Chang'an is Shaanxi, which is also a top coal-producing province in China, so it shouldn't be difficult to find some coal. Besides, if Shaanxi goes up, isn't that Shanxi? If you don't believe it yet, there will be no coal.

"Coal? What kind of charcoal is this, you can just say that this charcoal is made of something. ”

When the seventh master heard about coal, he had never heard of this kind of charcoal. So, he opened his mouth and asked Li Feng, as long as he knew what he was made of, it would be fine.

"This charcoal is made with...... Look at me, I'm dizzy, coal doesn't need to be burned."

Li Fenglai was thinking about the question, and suddenly heard the seventh master ask, what is this coal fired from, and he reflexively wanted to answer. But, when I think about it, that's not right. The coal was dug up directly from the ground, and it was used to burn it, not to burn it out of anything.

"Then it doesn't need to be burned, so why is it called charcoal?"

When the seventh master heard this, he was even more anxious, how could there be such charcoal. Charcoal is made from trees, so why doesn't this coal be burned with anything, can it still be called charcoal?

"How charcoal must be... Forget it, Seventh Master, let's not care what it's called now. Let me tell you this, this thing is black, and it looks the same color as charcoal, but it is dug out of the ground. One more thing is that this thing can also be ignited like charcoal."

Li Feng came back to his senses at this time, this coal is the modern name, who knows, what this ancient thing is called. He is entangled with the seventh master all day long over this name, isn't it boring for himself. So, I began to describe it in detail to the Seventh Master.

"I said you're a kid, you just say, you just want to find graphite. Isn't it, when it burns, there is a very unpleasant smell, the kind that chokes people. ”

"Yes, that's right, Seventh Master, do you know this thing, where is it nearby? Or where is it sold, and the price is not expensive. ”

When Li Feng heard this, the seventh master really knew about this coal, so he immediately asked very excitedly. It's just that what makes Li Feng feel strange is that this coal is called graphite. Isn't graphite something else? However, now, Li Feng doesn't care about this, all he wants to know is the price of this coal, or where it is nearby.

"What's the use of this? It is used to make a fire for cooking, and the fire head is not as good as wood. It is used to bake fire, it chokes people, it can't stand it, and it can't compare to charcoal. The people in the city will not use it on the base. And in the countryside, who will use that, the roots are not as good as firewood. Therefore, if you want to buy it, it is really hard to find. As for the neighborhood, I don't know if there is one, old man. Who cares about this useless thing. ”

"I mean, little madman, you don't mean that you want to buy this coal, do you?"

When the seventh master heard this, he thought, who uses this thing. However, soon, I came back to my senses. Li Feng just asked, where to sell this thing.

"It's not for sale, it's not going to be easy. However, since people rarely use this thing at this time, it must be a rotten and cheap thing. No, you have to go to the coal mine, without it, Lao Tzu wants to burn bricks and build a house, isn't that a fool's dream. However, how to find it, and where to find it. Moreover, it can't be too far, otherwise, in this year, it will be pulled by a horse-drawn carriage, and the freight will be scared to death. ”

"Hehe, there is, Lao Tzu is going to find the second child. Lao Tzu can't find it, can't he still find it? Yes, that's it. ”

The news provided by the Seventh Master to Li Feng made Li Feng happy and depressed. This thing must be found, but the traffic restrictions in these years have restricted many things to death. Just like the last time, he asked others to help him bring rice seeds back from Champa, and the price soared a hundred times. Of course, this is because the amount he wants is relatively small. However, the most important thing is that it is difficult for people to transport.

However, Li Feng can't help it, but can Li Shimin still have no choice.

"Seventh Master, you wait and go back slowly, I'll go first, I'm going to Chang'an City."

Thinking of this, Li Feng immediately turned around and ran, and said loudly to the Seventh Master as he ran.

"Hey, I said you bastard, what are you doing in Chang'an City if you have nothing to do. You haven't explained the matter yet, how to get it. Hehe...... This little bastard also said that my old man is in a hurry, and he is not the same, and he runs faster than a rabbit. Still, that graphite, oh no, that coal, is it really that good to use. But that's not right, I've seen it with my own eyes......"

When the seventh master saw that Li Feng had run away, he immediately shouted loudly behind him. It's a pity that Li Feng has already run far away, and after a few moments, he can't even see his back. Suddenly made the seventh master really depressed in his heart, but what made him even more curious was this graphite.

Running home like the wind, Li Feng first explained to them, and then prepared to go out.

Because there was only one person, and in order to be in a hurry, Li Feng did not use the carriage, but rode directly on the horse, and left the village, heading in the direction of Chang'an City