Mimeographing technique, in Yang Heng's previous life, was the most widely used method for school organs to print materials in small batches before the advent of printers.

Its composition is very simple, wax paper, iron pen, steel plate, and ink and ink rollers constitute a simple printing system, a class, or an organ unit used to print materials, and the test paper is the best printing method, and this printing method is often ignored by many traversers, and Yang Heng also ignored this kind of thing before, but when he remembered it, he immediately let people start to make it.

The difficulty of this printing system lies in the configuration of ink, once the ink configuration is successful, the students will be blessed, especially those poor children, they can't afford to buy advanced learning materials, and they can't even find the copy of the sample book, but with these mimeographed materials, their ability to learn will be greatly strengthened, that is, Li Er is also blessed, some ordinary orders, and even Di Bao can be issued in the form of mimeographs, so that he will save a lot of copyists' money, and even Yang Heng will make a fortune with it, mimeographed, naturally not very large, the word is small, his magnifying glass will be sold in the future, and the teachers are also blessed, when they ask questions, there will be no misheard things, every time the exam, as long as a few pieces of wax paper are engraved, the test paper is mimeographed, and the exam can be carried out, simple and clear.

While studying mimeographing, Yang Heng asked the paper-making craftsmen to begin to develop paper for mimeographing, which was originally used to make toilet paper, but now. He didn't just make toilet paper. Printing paper is also going to be made. Mimeographing is only a transitional process, although this mimeographic technique may continue for a long time, but movable type printing he still has to develop, movable type printing is the formal printing technology of a large number of publications.

Movable type printing, it is said that it was developed by the later Song Dynasty, but in Yang Heng's previous life, there were sticks that said that this movable type printing was invented by them, but. Now it's impossible, Yang Heng not only wants to leave evidence, but also assists Li Er to directly eliminate the ancestors of the stick, and even decides to take out all the men of the stick country as slaves, not to let them keep the seeds, and let the woman of the stick conceive the child of the Chinese man, so that there will be no future troubles in the future, and there will be no more robbing the Dragon Boat Festival, what to rob this and that, this kind of thing actually doesn't matter. It's disgusting, isn't it, so. Yang Heng decided that he must make this country never appear in the world.

"Xiao Langjun, this, we encountered a problem, that is, the ink is coated on the wax paper, because the ink is not too evenly painted, there is a pool of ink on the paper below, there is no handwriting in some places, and some places are very suitable, and we have used a lot of methods and have not come up with a suitable method, the wax paper has changed a lot of manufacturing methods, and the paper at the bottom has also studied a lot of formulas, that is, there are many formulas for ink, but we just can't succeed, so we came to ask for sin."

"How do you apply ink, it's okay, take me to see it, how can such a simple thing not be made, this book has received a lot, but this mimeograph technique has not been successful."

Yang Heng was a little angry and followed the craftsman to the development site of the mimeograph. When he saw it, he tilted his nose again, "That's how you apply ink, didn't I tell you to use rollers earlier?" He found that these craftsmen were actually using brushes to brush ink on wax paper, and even used brushes to paint on it, so even if the development was successful, how fast could it be, not only wasting manpower, but also wasting material resources.

"But Xiao Langjun, we don't know what a roller is, we think what you are talking about is a brush, you see, we specially made a brush with wolf hair, it is definitely more effective than the roller you said, you see how much ink absorption this brush is, and this ink, as long as you soak the brush in it and then pick it up, this ink will never drip down, this ink, that is used for writing is first-class good."

"Come on, come on, don't say it, you people, each of you will be fined a month's salary, this is to punish you for disobedience, since you don't understand, you should come and ask me, see how many things you have delayed, go, find the housekeeper to ask for a piece of cotton, do you know the cotton cloth, I don't know the way, then you just need to ask the housekeeper, go, I'll wait here."

People left, Yang Heng visited here, he found that there were several kinds of ink on the shelf, and a few stacks of paper, and each paper was different, especially on the side there were a few stacks of wax paper, and a few iron pens, but this iron pen was similar to Yang Heng, he scratched a few times on the wax paper, and found that the wax paper was very well made, and then he took the wax paper, and dipped his fingers in some ink, and tried them one by one, "Well, it's these three, the ink wax paper, and the paper are a perfect match," What did Yang Heng say for Lang, this ink was dipped in his fingers, and then he shook off the excess ink droplets, so it was the same as the ink ink of later generations, and then pressed it on the paper through the wax paper, there is a wax paper with poor ink permeability, no, there is a wax paper that is difficult to portray without use, and the paper at the bottom, there is ink, don't, this kind of writing may be the best, a little diffusion, so that the handwriting looks more beautiful, this is worse than Yang Heng's previous life to understand the half-life Xuan Xuan ink, than the familiar Xuan Xuan ink is more ink out, That is to say, it is a kind of paper between half-life Xuan and mature Xuan, but whether this kind of paper can withstand storage is still a problem, but is there rice paper in this era, is it to make this first, or forget it, leave a way for future generations.

But this kind of paper is not used in small characters, write it down first, and then let students write and paint, this kind of paper, not good, some brittle, although it is said that it is not ink, but it is too brittle, after passing through the hands of students, it may soon be broken, there is no value, fortunately, there is a kind of paper that can be used, not only is it not brittle, it is not ink, it is the best to use for mimeographing, and even writing small characters is also the best, why, if you don't use ink, it is clear to write.

"Xiao Langjun, the cotton cloth is here, and the housekeeper also asked me to bring a needlework lady, do you think you need her here?" "Well, the butler did a good job, I forgot to tell you earlier, go outside and call a carpenter."

The roller is very easy to do, but it also needs several types of work to cooperate, not only the carpenter, but also the blacksmith, but also the needleman, the blacksmith needs to make a sub-shaped bent iron rod, and the carpenter's work is simple, only need to make a short wooden stick with a hole in the middle, the needleman is to sew a double-layer cotton cover, which can be tightly put on the wooden stick, and a stack of cotton cloth is sewn up, and then put in the ink, the roller as long as it rolls around on this layer of cotton cloth, it will absorb the ink that is not light or thick, so that the first printing will not be inkAfter printing a few sheets, there will be no ink as a whole, and there will be no thick and light, and after a period of familiarity, there will be many people who will be able to operate this mimeograph machine.

"What's the use of this, it's not good-looking, it's not legible, you've done this for so long." Yes, Yang Heng was not praised, but let Li Gang spit on him.

"I said, Master Li, do you think that if we print some of these books and send them to the students, they will have one copy in each class at the time of class, which will be better, otherwise when the teacher writes in front, some students write slowly, and they have to copy other people's books after class, but there will be a delay in learning? It can even affect the teacher's lessons. ”

Because of the use of blackboard and chalk, teachers will copy the text in class first, if a page can not be copied, will erase and copy another page, which not only delays the teacher's time, but also delays the student's time, that is, writing, and does not practice anything, but has an impact on writing, why, this is to pursue the speed of copying, naturally will not write seriously.

"Let's try it then, but I'm against it." Yes, Li Gang actually learned some of Yang Heng's mantras, because usually when Yang Heng has a conflict with these people, but he doesn't know who is right and who is wrong, he will come to such a sentence, and I reserve my objections. (To be continued......)