Otaku Engineer in Great Tang Dynasty

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

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

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

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

That's right, he intends to let the workshop make a special batch of paper for the production of banknotes!

After all, if you want banknotes not to be imitated in the future, just relying on an anti-counterfeiting seal is not enough. If you add another anti-counterfeiting method, you will have an additional insurance!

"Okay! Since the young master is so confident, what's the harm in trying this old man!"

Uncle Fu nodded, then took a pen and paper from the side, sighed with emotion, and said, "Haha! Young master, don't blame it! At this age, my memory is not as good as before! Young master, please explain in detail how to do this water pattern paper, The old man will write it down first, and try it in these two days!"

Li Zexuan looked at Uncle Fu's wrinkled but kind face, and smiled gently: "What's so strange, after all, a good memory is not as good as a bad writing! Uncle Fu, you usually leave the affairs of the workshop to the following. People take care of it, but don't get tired!"

Uncle Fu smiled all over his face, and said, "Haha! Thank you young master for your concern, the old man will save it! Now in the workshop, the old man is only talking about his mouth, and it is not considered exhausting. God Doctor Sun praised the old man for his strong body years ago!"

"That's good!"

Li Zexuan smiled sincerely, and then came to the real business: "Fu Bo, this kind of paper is actually not complicated to make. First of all, let the steel factory forge a batch of water embossed rollers with protruding patterns, and then put them together. The water embossing rollers are mounted on our paper machine rollers and are used to emboss the paper.

During the papermaking process, the water pattern roller will contact the front of the paper, and the front of the paper will be printed with water patterns! The vertical and horizontal water patterns on the wet paper sheet, facing the light, can see the patterns of different transparency, visible on the plane, and evenly arranged!

By the way, the material for the production of water pattern paper must be mulberry bark, and no other materials can be used. Go back to Fu Bo and arrange for someone to buy a batch of mulberry bark for the workshop. First, buy it near Chang'an, and then go to Bashu area. Buy it, because there should be a lot of mulberry trees in the Bashu area. "

Water pattern paper is the kind of paper that can show bright lines or patterns in addition to the curtain pattern when looking at the light, just like the modern renminbi can see the portraits of great people when looking at the light, this water pattern paper can Adding the potential beauty of paper, it can also be used for anti-counterfeiting of banknotes!

In fact, water pattern paper has existed since ancient times, and it is not a patent of modern people. According to the original history, in the middle of the Tang Dynasty, people in Chengdu would invent "water pattern paper", which has two kinds of printing, clear and dark, which cannot be produced in other areas. , so it is called "Chuan paper".

Thanks to this, the earliest paper currency in Chinese history, Jiaozi, first appeared in the Sichuan area, and it was slowly spread later!

In the beginning, people didn't take paper money to heart at all. They just used it as stubs. They thought it was very easy to carry. Later, when they found it was very useful, they started to use them for transactions, and Jiaozi was gradually popularized.

In the Southern Song Dynasty, because the water pattern paper specially used to make Jiaozi in Sichuan could not be supplied, the paper printed in the Jianghuai area was used instead. 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 by Jiangnan than real ones, and severe punishments and laws could not stop the counterfeiting of banknotes, which directly caused the economy of the Southern Song Dynasty to fall into a quagmire!

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

"Mubark? Young master, why do you have to use mulberry bark to make paper?"

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

Li Zexuan replied, "Uncle Fu, the paper made from the bark of the mulberry tree is not only tougher than ordinary paper, but also has a better hand feel!"

Uncle Fu nodded suspiciously, and then felt a little strange, "Master, why do you spend so much time making water pattern paper?"

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

Li Zexuan smiled mysteriously, and said, "Uncle Fu, you will understand later. In addition to the water pattern paper, there is one more thing that needs to trouble Uncle Fu to arrange for the manpower to do it as soon as possible!"

"Master, please speak!"

For Li Zexuan's creative ability, Fu Bo has long been immune, so he didn't make a fuss to ask.

Li Zexuan paused for a while, and then said: "Fu Bo, you have recently tried to control the carbon content in the steel to make a slightly softer steel. I plan to use this steel to make an engraving plate with gravure printing. Engraving plate! After this steel is made, let Master Liu paint the engraving pattern I gave him on the steel plate, and I will engrave it myself!"

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

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

Gravure printing is the ultimate anti-counterfeiting method set by Li Zexuan to Tang Yuan. He does not believe in the world today.

Where else can there be such an advanced printing technology as the Qiquge Workshop!

More importantly, the master used in gravure is hand-carved, and hand-carving has unique anti-counterfeiting properties, because each engraver's work has its own personal style and characteristics, and it also has certain contingency. This is something that others cannot imitate, including his sculptor himself, and cannot sculpt an exact same engraving plate as before!

Although there are many advanced reproduction techniques and counterfeiting methods in the twenty-first century 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 the ways for those who delusionally imitate banknotes!

Although Fubo had never seen gravure engraving plates and gravure printing, he could roughly guess what Li Zexuan wanted to do only literally. After thinking for a moment, he nodded and said:

"Okay! At present, the workshop has been able to make steel. The kind of mild steel that the young master said should be fine!"

Li Zexuan gave a "hmm", then got up and said goodbye.

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