After handing over the drawings of the anti-counterfeiting seal to Liu Yidao, Li Zexuan went to find Fu Bo and assigned another task.

"Young master, is there really such a magical paper in this world?"

After hearing Li Zexuan's explanation, Fu Bo couldn't help but be surprised and said.

Li Zexuan said with a smile: "Of course there is, it's just that the production method is more troublesome, and when it is made, Fu Bo, you will understand that what I said today is true!" ”

That's right, he intends to have the workshop make a special batch of paper, which will be used exclusively for the production of banknotes!

After all, if you want to keep paper money from being imitated in the future, just relying on an anti-counterfeiting seal, it is somewhat insufficient.

"Good! Since the young master is so confident, then what's the harm of trying it! ”

Fu Bo nodded, then took a pen and paper from the side, sighed, and said, "Hehe! Don't blame the young master! I'm getting older, and my memory isn't as good as it used to be! Master, tell me in detail how to make this water pattern paper, the old man will write it down first, and try common sense in the past two days! ”

Li Zexuan looked at Fu Bo's wrinkled but kind face, and said with a gentle smile: "What's so strange about this, after all, a good memory is better than a bad pen!" Fu Bo, the affairs of the workshop, you usually leave it to the people below to take care of it, but don't be tired! ”

Fu Bo smiled all over his face and said, "Hehe! Thank you young master for your concern, the old man saved! Now in the workshop, the old man is just moving his mouth, not tired, and Doctor Sun praised the old man for his strong body many years ago! ”

"That's good!"

Li Zexuan smiled with sincere relief, and then got down to business: "Fu Bo, this kind of paper is actually not complicated to make, first of all, let the steel mill forge a batch of water ripple rollers with convex patterns, and then install the water ripple rollers on our paper machine rollers for embossing paper.

During the papermaking process, the ripple roller will come into contact with the front of the paper page, and the front side of the paper will be printed with the water pattern! The vertical and horizontal water lines on the wet paper page will show different transparency, flat and visible, and evenly arranged and neatly arranged patterns!

By the way, the material for the production of water pattern paper must be made of bark, not other materials, go back to Fubo, you arrange someone to buy a batch of bark for the workshop, first buy it near Chang'an, and then go to the Bashu area to buy, because there should be a lot of the tree in the Bashu area. ”

Water-patterned paper is the kind of paper that can show shiny lines or patterns in addition to curtain patterns when looking at the light, just like the modern RMB can see the head of the great man in the light, this water-patterned paper can add the potential beauty of the paper, and can also be used as a banknote anti-counterfeiting!

According to the original history, in the middle of the Tang Dynasty, Chengdu people would invent "water pattern paper", which was divided into two kinds of printing, bright and dark, and other regions could not be made at all, so it was called "Sichuan paper".

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

At first, people didn't take paper money to heart at all, but just used it as a stub, and thought it was very easy to carry, but later found that it was very easy to use, so they began to use it for trading, and Jiaozi gradually popularized.

In the Southern Song Dynasty, due to the lack of supply of water-patterned paper specially used to make Jiaozi in Sichuan, it switched to paper printing in the Jianghuai region. However, Jiangnan paper does not have the special anti-counterfeiting ability of Sichuan paper, so a large number of counterfeit coins appear on the market. At that time, there were more counterfeit coins of Jiaozi, Guanzi and Huizi issued in Jiangnan than genuine coins, and strict punishment and strict laws could not stop the counterfeiting of paper money, which directly led to the economy of the Southern Song Dynasty falling into a quagmire!

Therefore, the water pattern paper used in the production of banknotes is a very critical anti-counterfeiting means!

"Bark? Young master, why do you have to use the bark of the tree to make paper? ”

Fauber nodded again and again, but at the end, he couldn't help but ask.

Li Zexuan replied: "Fu Bo, the paper made of this bark is not only tougher than ordinary paper, but also has a better feel!" ”

Fu Bo nodded suspiciously, and then felt a little strange, "Young Master, what are you making water pattern paper for so much?" ”

blame him for only caring about technical issues before, and ignoring the purpose of Li Zexuan's move.

Li Zexuan smiled mysteriously and said, "You will understand this Fu Bo later." In addition to the water-patterned paper, there is another thing that needs to be bothered by Fubo to arrange for people to do it as soon as possible! ”

"Young Master, please speak!"

Regarding Li Zexuan's creative ability, Fu Bo had already developed immunity, so he didn't make a fuss about it at the moment.

Li Zexuan paused, and then said: "Fu Bo, you have recently found a way to control the carbon content in the steel to refine a slightly softer steel, and I plan to use this steel to make an engraving plate, gravure engraving plate!" After this kind of steel is refined, let Master Liu draw the engraving patterns I handed over to him on the steel plate, and I will engrave it myself! ”

Gravure printing, referred to as gravure printing, is the traditional method of modern banknote production, and in the 21st century, the production of banknotes is still commonly used in the world. The inking part of this printing plate is concave, and the printing plate is directly in contact with the paper surface during printing, and the ink in the concave is directly transferred to the paper under strong pressure, and the ink presents a three-dimensional state on the paper, and there is a feeling of unevenness when carefully touched by hand.

On the modern renminbi, it is easy to find two characteristics of gravure printing, one is the thick ink layer and strong feel; Second, it has a strong three-dimensional effect.

Gravure printing is the ultimate means for Li Zexuan to set up Tang Yuan's anti-counterfeiting, he doesn't believe that there is any place in the world today that can have such advanced printing technology!

More importantly, the mother plate used in gravure printing is hand-carved, and hand-carved has unique anti-counterfeiting properties, because each engraver's work has its own personal style and characteristics, and it also has a certain degree of chance, which can not be imitated by others, including his own can no longer carve an exact same engraving as before!

Although there are many advanced copying techniques and counterfeiting methods in modern society, it is impossible to reproduce banknotes that are exactly the same as hand-carved works.

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

Although Fu Bo had never seen gravure engraving plates and gravure printing, he could roughly guess what Li Zexuan wanted to do just literally, and after pondering for a moment, he nodded and said:

"Good! At present, the workshop has been able to smelt steel, and the kind of soft steel that the young master said should be no problem! ”

Li Zexuan said "um", and then got up to say goodbye.

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