Paper is an important material and technical foundation for banknotes. The printing technology, quality, and anti-counterfeit measures of banknotes in various countries are mainly represented by banknote printing paper. In order to prevent counterfeiting, the national currency paper is special paper for banknote printing produced by a special paper mill. Long-fiber plants such as cotton and hemp are used as raw materials for papermaking. The paper produced is clean, and the paper is tough and has strong abrasion resistance. Force, long-term use is not easy to fluff, wear or break. In addition, various special procedures have also been adopted by various countries in the production of paper for printing banknotes, so that the paper has the security features that ordinary paper does not have.
1. Watermark. In the papermaking process, portraits or various figures are sculpted on the copper wire mesh. When the pulp flows into the copper wire mesh, due to the different depths of the copper wire mesh, various watermarks with different fiber densities or depressions are formed after the pressurization. The bills of different denominations of different countries have different watermark distribution locations, which can be divided into three types: one is a fixed location watermark, that is, the location of the watermark pattern on the banknote is fixed; the second is a semi-fixed location watermark, ie each group of watermark patterns mutually The position between the two is fixed, and each group of watermarks has a continuous arrangement on the ticket surface. Third, the indefinite position watermark refers to the full version of the watermark distributed on the ticket surface. Watermarks are in the form of figures or animals, geometric shapes, and text patterns. The transparent watermark observation watermark is clear and vivid, the image is vivid and vivid, the layers are rich, the three-dimensional sense is strong, and the anti-counterfeiting effect is very good. The use of watermarks as a security technology is widely used in various currencies.
2. Fiber yarns and color dots. Papermaking involves the incorporation of special colored filaments into the pulp, or the incorporation of small round discs made of metal or plastic, and some that sprinkle the filaments on the paper before the paper is formed. Special materials play a security role. The filaments on various banknotes vary in their color, length, thickness, degree of exposure and distribution. For example, in the U.S. banknotes printed after 1928, red and blue fiber filaments spread over the entire face of a ticket, but from the top down there was only a narrow strip of land in the middle of the parcel. Some countries also added radioactive elements to these materials, which were visible in the ultraviolet light. Banknotes such as Swiss francs, Danish krone, Austrian shillings, and Dutch guilders have fluorescent filaments.
3. Security line. During the papermaking process, paper is copied into the paper and becomes part of the structure of the banknote paper. The materials used for the security line have been developed from the earliest metal lines to the currently used opaque plastic lines, fluorescent lines, and microprinting lines. The production of safety lines requires high papermaking technology, especially the intermittent exposure of safety lines. This security line was buried in the paper for a period of time, a section of which was exposed on paper and the exposed part was silver-white. For example, the new 20-pound bill in the pound sterling was changed from a metal safety line to an intermittent safety line. Its technical requirements are very high, making counterfeiting difficult to succeed.
4. Machine-readable fiber and safety threads. With the continuous in-depth development of counterfeiting, anti-counterfeiting, and the development of identification technology, some countries have already developed a fiber filament distribution and safety line that can be used to identify authenticity, and have already put it into practice.
The earliest banknote watermarked paper in the world was first used for the 1665 Swedish banknotes. Subsequently, watermarks were also used on German and Austrian banknotes. The 1930 Austrian banknote used portrait watermarks for the first time.
In the middle of the last century, some people in China proposed the idea of ​​manufacturing a watermarked banknote paper, which eventually failed to be realized due to social reasons at that time. It was not until 1960 that the first domestic watermark paper was created. The original watermark paper was a full-fledged five-star ancient coin motif. In 1963, it created the first Tiananmen fixed watermark banknote paper, which was applied to a 10-yuan note.
In the fourth set of renminbi, 10 yuan, 50 yuan and 100 yuan vouchers used avatar watermarks, and the technical level was much higher than that of the five-star and Tiananmen gang consisting of geometric lines. The portraits were of clear outline, rich in levels, natural and gracious. .
Since 1959, China has begun to develop universal banknote paper, full version watermark paper and fixed watermark paper based on its own raw materials.
In 1990, the first metal security line banknote paper was successfully produced, and the successful production of bondless fluorescent fiber-added security paper
1. Watermark. In the papermaking process, portraits or various figures are sculpted on the copper wire mesh. When the pulp flows into the copper wire mesh, due to the different depths of the copper wire mesh, various watermarks with different fiber densities or depressions are formed after the pressurization. The bills of different denominations of different countries have different watermark distribution locations, which can be divided into three types: one is a fixed location watermark, that is, the location of the watermark pattern on the banknote is fixed; the second is a semi-fixed location watermark, ie each group of watermark patterns mutually The position between the two is fixed, and each group of watermarks has a continuous arrangement on the ticket surface. Third, the indefinite position watermark refers to the full version of the watermark distributed on the ticket surface. Watermarks are in the form of figures or animals, geometric shapes, and text patterns. The transparent watermark observation watermark is clear and vivid, the image is vivid and vivid, the layers are rich, the three-dimensional sense is strong, and the anti-counterfeiting effect is very good. The use of watermarks as a security technology is widely used in various currencies.
2. Fiber yarns and color dots. Papermaking involves the incorporation of special colored filaments into the pulp, or the incorporation of small round discs made of metal or plastic, and some that sprinkle the filaments on the paper before the paper is formed. Special materials play a security role. The filaments on various banknotes vary in their color, length, thickness, degree of exposure and distribution. For example, in the U.S. banknotes printed after 1928, red and blue fiber filaments spread over the entire face of a ticket, but from the top down there was only a narrow strip of land in the middle of the parcel. Some countries also added radioactive elements to these materials, which were visible in the ultraviolet light. Banknotes such as Swiss francs, Danish krone, Austrian shillings, and Dutch guilders have fluorescent filaments.
3. Security line. During the papermaking process, paper is copied into the paper and becomes part of the structure of the banknote paper. The materials used for the security line have been developed from the earliest metal lines to the currently used opaque plastic lines, fluorescent lines, and microprinting lines. The production of safety lines requires high papermaking technology, especially the intermittent exposure of safety lines. This security line was buried in the paper for a period of time, a section of which was exposed on paper and the exposed part was silver-white. For example, the new 20-pound bill in the pound sterling was changed from a metal safety line to an intermittent safety line. Its technical requirements are very high, making counterfeiting difficult to succeed.
4. Machine-readable fiber and safety threads. With the continuous in-depth development of counterfeiting, anti-counterfeiting, and the development of identification technology, some countries have already developed a fiber filament distribution and safety line that can be used to identify authenticity, and have already put it into practice.
The earliest banknote watermarked paper in the world was first used for the 1665 Swedish banknotes. Subsequently, watermarks were also used on German and Austrian banknotes. The 1930 Austrian banknote used portrait watermarks for the first time.
In the middle of the last century, some people in China proposed the idea of ​​manufacturing a watermarked banknote paper, which eventually failed to be realized due to social reasons at that time. It was not until 1960 that the first domestic watermark paper was created. The original watermark paper was a full-fledged five-star ancient coin motif. In 1963, it created the first Tiananmen fixed watermark banknote paper, which was applied to a 10-yuan note.
In the fourth set of renminbi, 10 yuan, 50 yuan and 100 yuan vouchers used avatar watermarks, and the technical level was much higher than that of the five-star and Tiananmen gang consisting of geometric lines. The portraits were of clear outline, rich in levels, natural and gracious. .
Since 1959, China has begun to develop universal banknote paper, full version watermark paper and fixed watermark paper based on its own raw materials.
In 1990, the first metal security line banknote paper was successfully produced, and the successful production of bondless fluorescent fiber-added security paper
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