Otaku Engineer in Great Tang Dynasty Chapter 1216: Three-pronged approach!

? After handing Liu Yidao the drawing of the anti-counterfeiting seal with his own Tang Yuan pattern, Li Zexuan went to find Fu Bo and assigned another task.

"Master, is there such a magical paper in this world?"

After hearing Li Zexuan's coming, Uncle Fu couldn't help but be surprised, said.

Li Zexuan smiled and said: "Of course there is, but the production method is more troublesome. When it is finished, Fu Bo, you will understand that what I said today is true!"

Yes, he intends to make a batch of special paper in the workshop, specifically for the production of banknotes!

After all, if the banknotes will not be imitated in the future, just relying on an anti-counterfeiting seal is not enough. An additional anti-counterfeiting means will be added to the insurance!

"Okay! Since the young master is so confident, why not try it!"

Fubo nodded, then took a pen and paper from the side, and said with emotion, "Hehe! Master, don’t blame! I am getting older and my memory is not as good as before! Master, please tell me more about the water-grained paper. How to do it, I will write it down first, and try common sense in these two days!"

Li Zexuan looked at Fu Bo’s wrinkled but kind face, and smiled gently: “What’s so strange about it, after all, it’s not as good as a bad pen! Fu Bo, the work of the workshop, you usually Just leave it to the people below to take care of it, but don't be tired!"

Uncle Fu smiled and said: "Haha! Thank you, the young master, for your concern, the old man saves! Now in the workshop, the old man just moves his mouth, not exhausted. The great doctor Sun praised the old man for his health. !"

"That's good!"

Li Zexuan smiled heartily, and then said the business: "Fu Bo, this kind of paper is actually not too complicated to make. First of all, let the steel plant forge a batch of water pattern rollers with convex patterns. Afterwards, the water pattern roller was installed on the roller of our paper machine to emboss the paper.

During the papermaking process, the water pattern roller will contact the front side of the paper, and the front side of the paper will be printed with water patterns! The vertical and horizontal water lines on the wet paper page will show a neatly arranged pattern with different transparency, visible from the plain view!

By the way, the material for the production of water-grained paper must be mulberry bark, and other materials cannot be used. Turning back, Uncle Fu, please arrange for someone to buy a batch of mulberry bark from the workshop, first buy it close to Chang'an, and then Go to Bashu area to buy, because there should be a lot of Chushu in Bashu area. "

Water-grained paper is the kind of paper that can show bright lines or patterns in addition to the curtain pattern when you look at the light. It is the same reason that you can see the heads of great men when you look at the light. Textured paper can increase the potential beauty of paper, and can also be used as banknote anti-counterfeiting!

Actually, water-grained paper has existed in ancient times, and it is not a patent of modern people. According to the original history, in the middle of the Tang Dynasty, Chengdu people would invent "water-grained paper". Cannot be made, so it is called "Chuan paper".

Thanks to this, Jiaozi, the earliest paper currency in Chinese history, first appeared in Sichuan, and then slowly spread out!

In the beginning, people didn't take banknotes to their hearts at all. They were just used as stubs and found it to be very easy to carry. Later, when they found it was easy to use, they began to use them for trading, and Jiaozi was gradually promoted.

In the Southern Song Dynasty, the water-grained paper used for making Jiaozi in Sichuan was not available, so the paper was printed in Jianghuai area. However, Jiangnan Paper does not have the special anti-counterfeiting capabilities of Sichuan Paper, so a large number of counterfeit currencies appear on the market. At that time, Jiangnan issued more counterfeit coins, such as Jiaozi, Guanzi, and Huizi, than real coins. The severe penalties could not stop the counterfeiting of banknotes. This directly caused the Southern Song Dynasty economy to fall into a quagmire!

So, the water-grained paper used to produce banknotes is a very critical anti-counterfeiting method!

"Chopsticks bark? Master, why do you have to use tree bark to make paper?"

Fu Uncle nodded his head again and again, but couldn't help asking at the end.

Li Zexuan replied: "Fu Bo, this paper made of bark is not only more tenacious than ordinary paper, but also feels better!"

Fu Bo nodded his head suspiciously, and then felt a little strange, "Master, what are you doing so much for making water-textured paper?"

It is blamed for him that he only cared about technical issues and ignored the purpose of Li Zexuan's move.

Li Zexuan smiled mysteriously and said: "This Fu Bo, you will understand later. In addition to the water-grained paper, there is one more thing that needs to be troubled by Fu Bo to arrange manpower to do it as soon as possible!"

"Master, please say!"

For Li Zexuan's creative ability, Fu Bo has already been immune to it, so he didn't make a fuss about asking.

Li Zexuan paused, then said: "Fu Bo, you recently thought of a way to control the carbon content in steel to produce a slightly softer steel. I plan to use this steel to make a carving board. , Gravure engraving board! After the steel is refined, let Master Liu paint the engraving patterns that I gave him to the steel plate, and I will engrave it myself when I look back!"

Gravure printing, referred to as gravure printing, is a traditional method of modern banknote production. In the 21st century, all countries in the world still generally use gravure printing to produce banknotes. The inking part of this printing plate is concave. The printing plate is in direct contact with the paper surface during printing. Under strong pressure, the ink in the concave pattern is directly transferred to the paper. The ink is in a three-dimensional state on the paper. There is a feeling of unevenness.

On modern renminbi, two characteristics of gravure printing can be easily found, one is the thick ink layer and the strong hand feeling; the other is the strong three-dimensional effect.

Gravure printing is the ultimate method Li Zexuan sets for Tang Yuan’s anti-counterfeiting. He does not believe that there is such an advanced printing technology in the world today!

More importantly, the master plate used in gravure printing is hand-carved. Hand-carved has unique anti-counterfeiting properties, because each engraver’s work has its own personal style and characteristics, and it also has The contingency of this is something that others cannot imitate, including that he himself can no longer carve a carving plate exactly like the previous one!

Although there are many advanced copying technologies and counterfeiting methods in modern society~IndoMTL.com~, they cannot copy banknotes exactly like hand-carved works.

With such a three-pronged approach, Li Zexuan can be said to block all those who want to imitate banknotes!

Although Fu Bo has never seen gravure engraving and gravure printing, he can guess what Li Zexuan wants to do literally only. After a moment of thought, he nodded:

"Okay! At present, the workshop can already produce steel. The kind of mild steel that the master said should be fine!"

Li Zexuan let out an "um", then got up and left.

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