"Limestone, clay and gypsum." Li Chuan said with some uncertainty: "That's pretty much it, you get a little bit of everything first." ”

"By the way, we still need to calcin, and then get some coal."

"Coal?"

"Probably you call it graphite or coal, or blackstone?"

"I know what it is, don't worry, soon." Li Chengqian passed down the order.

It's hard to get a large amount, but it's okay to get a small amount, and within half an hour, everything will be ready.

Li Chuan first picked up two pieces of coal, good coal, black and shiny, still large, quite regular, it felt like it was deliberately picked out! -_-|||

Now it's just a matter of crushing the limestone, mixing it with the clay, and calcining it.

“emmm…… Let's change places, find a place with a kiln, and find someone who can burn the cellar. "It's not that he wants to be lazy, it's that he really doesn't want to do this job, and besides, he really can't do it, so it's better to let the experienced ones come.

"Good!" Li Chengqian responded to all requests.

So the materials that had just been moved were moved out again, and they were directly moved to the craftsman's prison.

The craftsman supervisor has a ready-made cellar, and it is also close, which is quite convenient for Li Chuan to experiment.

The limestone was shattered, and there was dust flying everywhere, Li Chuan hid his face and took two steps back, regretting why he forgot the mask? That's one of the artifacts of Huaguo!

Crushed, mixed with clay, sent to the cellar for burning.

Then the craftsman who burned the cellar asked, "County, how long will this cement be burned?" ”

How long does it take? Li Chuan raised his head slightly, looked at the sky at 45 degrees, and said in a deep voice: "It's good to burn, you can test it yourself, grind it into powder after burning, mix it with an appropriate amount of gypsum, and I'll tell you what a qualified finished product is." ”

Li Chuan picked up a wooden stick, walked to an open space and drew a few boxes, threw the wooden stick away, and said: "You put the finished cement burned in the box, add water, add stones, and then stir, oh, you let people make a frame with wood, enclose this square, the height, just one foot, the evenly mixed cement is poured into it, and the top is smoothed, and then after the cement is dry, you find a guard to come over and smash it with a sledgehammer, if it can't be broken, then it is qualified." ”

The craftsman wrote it down carefully, and then asked, "How tall is a foot?" ”

Li Chuan: "......"

Raised his hand and gestured, "Probably, it's that high." ”

The craftsman took a rope over, measured the distance between Li Chuan's hands very carefully, and then tied a knot before saying, "County, the minister has written it down." ”

Li Chuan put down his hand, "Okay, notify me of the results." ”

The little prince leaned over, "Is this the end?" ”

"Let's just wait for the results."

Cement went to experiment, then there is still a lack of red bricks.

The red bricks are fired from clay, and he doesn't know exactly how to burn them, so he needs to let the craftsmen do experiments.

Let's wait for the cement to be made, anyway, it's not summer yet, so there's no hurry.

He also wanted to do it too soon to build roads and houses, but the problem was that the treasury could not afford it.

No one has no money, what can they do? I can't do anything, just squint and stop.

"He's tossing something new again? Cement? Just listening to this name, Li Shimin really couldn't think of what Li Chuan would come up with.

But whatever it is, it's definitely a good thing.

Li Shimin raised his hand and pointed the cup in his hand at the sun, this is a green cup, the green is still very uneven, the deep and light green is like a mottled grass that has been half gnawed by sheep, but Li Shimin thinks it is very beautiful.

After all, it was the first successful glass product.

Li Chuan didn't lie to him, the sand can really burn out Ryu, no, glass.

Just such a cup, the cost is almost negligible, but when it is taken to the market, it can be sold for at least 1,000 taels of silver.

Hmm, a thousand taels?!

"Get Li Chuan." Li Shimin gently and carefully put down the cup.

Wang Dehai quickly walked outside the hall and passed on the will.

Li Chuan and Li Chengqian had just returned to Yiqiu Palace from the craftsman's prison and received a summons.

Li Chengqian watched Li Chuan walk away with sympathy, in fact, he didn't know whether he was sympathizing with Li Chuan or his father.

Listening to the queen mother, every time his father was angry, his filial son could only pray in his heart, hoping that Li Chuan would be merciful.

"Wechen visited Your Majesty, I don't know if Your Majesty called Wechen, what do you have to explain?" Li Chuan couldn't guess what Li Shimin was looking for him, so he simply asked directly.

"Come and see this." Li Shimin's expression was like a child who had gotten a piece of candy and wanted to show it in front of others, but he was reluctant to show it too obviously.

Vulgar voice, invisibly pretending!

Li Chuan's gaze fell on the table, very disgusted, "Glass? It's not qualified, the color is really ugly. ”

Li Shimin: "......"

Li Chuan picked up the glass and touched it in a circle, "The thickness is uneven, and there are bulges in some places, tsk, it's okay to listen to it, it's useless." ”

Li Shimin: "......" wanted to strangle him.

pretended to fail and was disliked, Li Shimin's face suddenly became unsightly.

Li Chuan discovered this later, was silent for a moment, and said: "The glass is green, it should be that the iron content in it is too high, you can use a magnet to suck it again, and then send it to the cellar to burn." ”

"And then it becomes transparent?"

"That can't be, but it's definitely better than this one." Li Chuan was very skeptical that he could burn transparent glass at the level of Datang.

Why is it so simple, but when it comes to him, it becomes so difficult?!

Li Shimin snatched the glass from Li Chuan's hand and carefully placed it in the box, "I heard, what kind of cement are you going to make?" What is it for? ”

"Pan Kang!" This is Li Chuan's most rustic idea.

Li Shimin was silent, he didn't understand.

Li Chuan was also silent and did not explain.

The two looked at each other silently, suddenly feeling a little embarrassed.

"Your Majesty, Lord Fang asks to see you." Wang Dehai's sudden report relieved the two of them.

"Let him in." After Li Shimin finished speaking, he went to see Li Chuan again, and Li Chuan said very interestingly: "Weichen retired." ”

"Let's go down!" Li Shimin waved his hand, originally he wanted to ask Li Chuan how much the glass could be worth, but looking at Li Chuan's disgusted expression, it was estimated that he would reply to him that it was worthless.

When Li Chuan went out, Fang Xuanling was entering the door, and the two staggered by, Li Chuan gave a salute, and Fang Xuanling returned the salute.

"Your Majesty, the number of grain stocks in the national Yicang has been counted, and the situation is not optimistic." Fang Xuanling's face was heavy.

"The country's grain stocks add up, and they can only feed the people of a government for three months, and there is no grain in many places at all, and some corrupt officials have already resold the grain.

"Your Majesty, the officials need to be rectified, and in addition, we have to find other ways to get more food back."