Since the appearance of the wheel, it has been constantly changing the world, from the very beginning of the potter's wheel, the wheel, until the end of the Han Dynasty, a ten-standing servant in order to please the Emperor Ling, made the first waterwheel to play in the water.

The Ten Servants of the late Han Dynasty were despicable, but the waterwheel he made was indeed great.

The emergence of the waterwheel not only could draw water from the lower places to irrigate the fields, but also derived the hydraulic equipment of water mills and water mills for processing grain in the Wei and Jin dynasties.

The emergence of the water mill has made the wheat rice, which is difficult to swallow, easily turn into flour, from the life-saving food of poor families to the delicacy of rich and noble families.

This also directly changed the eating habits of northern China, you must know that during the Han Dynasty, China still used chestnut rice as the staple food, until the emergence of water mills, after hundreds of years, people accepted pasta as the staple food.

During the drought in Guanzhong, Yang Wenhua naturally built many waterwheel mills.

Ever since the rains, these mills have been grinding flour day and night to feed the remaining villagers.

The mill that was assigned to the third sister to grind peppers was not far below the reservoir.

However, the place where Yang Wenhua took the third sister was not a mill, but to the workshop area where Yang Da was located.

A large number of workshops were built at the foot of the hill on the edge of the reservoir, among which the ceramic and brick workshops on the side of the mountain were constantly emitting smoke, and the nearby iron and wood workshops were constantly making all kinds of noisy noises.

It is a large industrial park.

Yang Wenhua has the same attitude towards this place as the cultivation of Yang Guo, which is basically unguarded, as long as it is a person from Datang, you can go in and watch it at will if you give some gold.

For Yang Wenhua, there was nothing high-end in it, and instead of trying to prevent it, it was still discovered by others in the end, so it was better to make some money generously.

Yang Da's office area, located at the entrance of the industrial park, after asking the janitor at the door, Yang Wenhua took the third sister to find Yang Da.

After Yang Wenhua explained the requirements to Yang Da, Yang Da nodded, saying that there was no problem, and they were all things that could be easily made.

After Yang Da instructed the matter, he reported to Yang Wenhua: "Brother, now that each workshop has a lot of input, should we expand the scale a little." ”

Yang Wenhua smiled indifferently and said: "You look at it, these workshops will be given to you in the future, and you can keep the money you earn." ”

Interests are a person's driving force, since Yang Da is thinking about these workshops in his heart, and now the management is not bad, Yang Wenhua simply gave him a direct calculation.

"Then thank you, brother."

Yang Da didn't shirk it, after getting along for a long time, he naturally knew that since Yang Wenhua said it to him, he naturally didn't attach much importance to these things.

"Now that the paper workshop has made several kinds of paper according to my brother's instructions, my brother thinks it is more appropriate to sell it at a high price?"

At this time, Yang Wenhua was a little interested, mainly because every time he brought a napkin from outside to use it, he was really unhappy.

"Do you have a sample here? Show me. ”

"Yes."

Yang Da nodded, took out a stack of yellow papers, and the third sister reached out to take it and touched it, and said disdainfully: "It's a little hard, it's not white, it's not as good as at home." ”

Yang Wenhua tested the hardness of the paper and felt that it was acceptable, so he said to the third sister: "What do you know, this kind of raw pulp paper is good." ”

"You said you could use it, but I don't want this anyway."

You don't need this, just use bamboo chips, but Yang Wenhua didn't say it, otherwise the little girl wouldn't know how to make trouble.

Putting down the original yellow paper, Yang Wenhua picked up two other kinds of white paper and looked at it, the thin kind of white paper can be used for writing, and the thick one, Yang Wenhua intends to use it for printing.

After weighing it in his heart, Yang Wenhua said to Yang Da: "Cut this thin white paper and yellow paper together into a ruler half a foot wide, and push it into the market with two copper plates." ”

"Is this price a little too high? White paper is good to say, yellow paper also sells two copper plates, but I'm afraid it's not easy to sell. ”

Usually a catty of rice is only one or two copper plates, and Yang Wenhua plans to sell a catty of rice for a piece of paper, so Yang Dacai asked.

It's not easy to sell, the people who can use yellow paper are rich people, Yang Wenhua did it on purpose.

"Let's try it first, but now Datang does not have such a good paper, if the price is too low, it may cause too much impact on other paper workshops, and then go to the market later."

"It's fine."

Yang Da nodded, agreed, and then asked, "Then what does my brother plan to do with this kind of thick white paper?" ”

"Look at it, I was going to use it for printing books."

Hearing that Yang Wenhua was planning to print books, Yang Da asked in some surprise: "Books, that's a lot of money, and will the imperial court allow it?" ”

The Tang Dynasty was extremely strict in the management of book printing, and did not allow private printing, and the money and food spent on engraving and printing a book was not affordable by ordinary people.

"Printing simple characters, pinyin, number addition, subtraction, multiplication and division, Analects, disciple rules and other enlightenment readings, should not be a big problem, as for the cost, for the brother has his own tricks, can greatly reduce the cost."

Thinking of Yang Wenhua's ability, Yang Da suddenly thought, "In this case, please ask my brother to teach me." ”

"Movable type cylinder printing."

Make a word first, and then embed it on the roller, the upper and lower rollers are stuck, and the white paper is stuffed in the middle, and a book comes out directly after rolling a circle.

As long as the speed of the ink and the cylinder is adjusted, it is easy to print 10,000 meters of white paper a day on a cylinder.

Of course, there are many things to be aware of.

For example, the ink must be added with a certain proportion of vegetable oil, so that the paper can be separated from the cylinder.

Because the printed paper has vegetable oil, it must be dried so that it will not deink, otherwise you want to wait for the vegetable oil to dry naturally, and you may not be able to dry it for a few days.

As for the production of rollers and pottery characters, as well as the concentration of ink, how to ensure that it can be printed well and dried quickly, these need to be slowly experimented by Yang Da.

Yang Wenhua explained the details, and Yang Da wrote them down carefully.

After Yang Da finished recording, although it has not been verified, he also feels that it should not be difficult to achieve.

"Brother, rest assured, the younger brother will definitely produce movable type as soon as possible, so that the brother's knowledge can spread as soon as possible."

Yang Wenhua smiled and said: "It's not just simple characters, pinyin, and numbers are knowledge, but things in agriculture and animal husbandry, and workshops can also be printed and disseminated." ”