The prosperity of the commodity economy and the competition in the market have promoted the improvement of the quality of product packaging, and beautifying packaging has become an important means of marketing and propaganda. The printing quality of corrugated boxes has been increasingly valued by commodity producers and consumers. With the development of printing technology, printing of corrugated boxes has adopted flexible printing technology. According to statistics, 98% of the causes and 85% of corrugated cartons in Western Europe are printed using this technology. In the past ten years, the development of flexographic technology in China has also been rapid. In addition to introducing many advanced technologies and equipment, there are more than 20 machine manufacturers producing and selling corrugated carton flexo printing slot machines, and some coastal cities are also controlling the corrugated paper. The technology of color screen printing on the box. This article provides some views on the technology of printing corrugated boxes with flexible photosensitive resin plates, for reference only.
The use of flexographic printing corrugated boxes has the following reasons.
1. The printing of color version of corrugated carton box with flexible printing can be developed from single-color, two-color to multi-color screen printing. This is an inevitable trend. I recently saw a hand-carton box with 100 LPI (line/inch) printed on the E corrugated box brought back from France. Printing 100 LPI on corrugated boxes can be said to be higher. Printing on A, B, and C corrugated sheets is generally less than 80 LPI, commonly used 40-60 LPI, and 40 or less.
Printed cable version, the quality of corrugated board is also very important, foreign countries tend to use E corrugated, multi-layer composite corrugated is also printed on the E corrugated layer, so that the printing pressure is more uniform, the network point is flat, but also save paper. There are not many E-tiles in China. The three-layer corrugated paper is a combination of A, C or B type corrugated, and the five-layer corrugated paperboard is a composite of AB or BC type corrugated. E-type corrugated board is rarely used or it is combined with E-type corrugated board. Corrugated cardboard.
Printed cable version of the corrugated board to use white paper, foreign generally use lust material white cardboard or 80 grams of single-sided stencil paper, offset paper. Printed cable prints on kraft paper are generally not printed in three primary colors, and the number of screens should not exceed 60 LPI.
Flexo printing can both print the field version and print the cable version in line with the printing requirements of corrugated cardboard. However, although the composite after the first printing of the paper is of good quality, the process is complicated and the efficiency is low, and it is not suitable for mass production. However, many domestic manufacturers still adopt this technology and it is estimated that they will be phased out in the future. Corrugated board printing process should be used after the first forming the printing process.
2, flexible version of the elastic deformation of flexible version is made of resin as the main body of the plate, there is elastic deformation is its characteristics. Corrugated board is the worst in the printing substrate error and surface roughness, especially A, C-type corrugated. The flexographic printing plate can compensate for the thickness error and surface unevenness of the corrugated board with its own compression deformation during the printing process, so that the printing ink is more uniform, thereby improving the quality of the finished product.
3. Flexographic printing belongs to light pressure printing Corrugated cardboard is corrugated due to its corrugation, which results in uneven pressure during the printing process. The corrugation is pressed at a large height, the corrugation is pressed lightly at low pressure, and corrugation is sometimes printed at low pressure. To the phenomenon that the ink cannot be printed. Offset printing and gravure printing can not overcome this defect, resulting in serious signs of corrugation. The flexo printing is light pressure printing. After the plate is compressed and deformed, the corrugated cardboard can be well contacted, and the high corrugated area will not produce severe marks due to the pressure. Some corrugated cartons printed with flexo printing technology have serious traces of corrugated and severe hard mouths, which are caused by the quality of the corrugated board, the thickness of the flexographic plate, the lack of selection of hardness, and poor operating technology.
4. Flexo printing can use water-based ink paper to be interlaced with fibers. Its hydrophilicity is better than that of lipophilicity. Therefore, water-based ink is used to print corrugated boxes. The printing plate needs only light contact with corrugated cardboard, and the water-based ink will be almost completely. absorbed. Flexographic printing uses a metal anilox ink transfer system that can use water-based inks and is more suitable for printing corrugated board.
The plate is flexible, deformable and has low pressure. The use of water-based ink is the ideal combination for printing corrugated cardboard.
5. The structure of the flexo press is simple. The corrugated box has a large area and the length of the cardboard can reach 2-3 meters. If offset printing is used, the equipment is huge and operation and maintenance are difficult. The flexible printing press has a simple structure, and the four rollers are made into one color group. After the diameter of the roller is larger, the mechanical performance and stability can be improved, and the loading, adjustment and cleaning are very convenient. As the production technology of plate material, metal anilox roller and water-based ink are mature, the corrugated paper box adopts...
6. Compatible with other processing equipments The production line flexo printing press has a simple structure and can be combined with other processes to form a linkage production line, greatly improving work efficiency and reducing labor intensity, and can meet the requirements of mass production. Most corrugated board presses are now combined with creasing machines and slotting machines for on-line production. The printing production line consisting of indentation, slotting, die cutting, glue coating, box making, and counting device can directly print the corrugated carton once.
At present, there are more two-color machines in the domestic market, and the performance is also general. Should pay attention to the development of 3 color machine, 4 color machine (spot color), 5 color machine (glazing) and linkage production line. Foreign advanced small-format flexographic printing speed is 350 sheets per minute, and large-format flexo printing speed is 170-220 sheets per minute. In comparison, the domestic printing speed of flexo printing presses also needs to be improved.
The above few indicate that flexo printing is the most ideal printing method for corrugated cartons, which not only suits the characteristics of corrugated cardboard, but also meets the requirements of product quality, and can also form large-scale production. Therefore, it is a high-quality, high-speed, and high-efficiency printing of corrugated cardboard boxes. method. However, we can only produce products that meet the printing quality requirements of corrugated boxes and should gradually become the main topic in the future.
The use of flexographic printing corrugated boxes has the following reasons.
1. The printing of color version of corrugated carton box with flexible printing can be developed from single-color, two-color to multi-color screen printing. This is an inevitable trend. I recently saw a hand-carton box with 100 LPI (line/inch) printed on the E corrugated box brought back from France. Printing 100 LPI on corrugated boxes can be said to be higher. Printing on A, B, and C corrugated sheets is generally less than 80 LPI, commonly used 40-60 LPI, and 40 or less.
Printed cable version, the quality of corrugated board is also very important, foreign countries tend to use E corrugated, multi-layer composite corrugated is also printed on the E corrugated layer, so that the printing pressure is more uniform, the network point is flat, but also save paper. There are not many E-tiles in China. The three-layer corrugated paper is a combination of A, C or B type corrugated, and the five-layer corrugated paperboard is a composite of AB or BC type corrugated. E-type corrugated board is rarely used or it is combined with E-type corrugated board. Corrugated cardboard.
Printed cable version of the corrugated board to use white paper, foreign generally use lust material white cardboard or 80 grams of single-sided stencil paper, offset paper. Printed cable prints on kraft paper are generally not printed in three primary colors, and the number of screens should not exceed 60 LPI.
Flexo printing can both print the field version and print the cable version in line with the printing requirements of corrugated cardboard. However, although the composite after the first printing of the paper is of good quality, the process is complicated and the efficiency is low, and it is not suitable for mass production. However, many domestic manufacturers still adopt this technology and it is estimated that they will be phased out in the future. Corrugated board printing process should be used after the first forming the printing process.
2, flexible version of the elastic deformation of flexible version is made of resin as the main body of the plate, there is elastic deformation is its characteristics. Corrugated board is the worst in the printing substrate error and surface roughness, especially A, C-type corrugated. The flexographic printing plate can compensate for the thickness error and surface unevenness of the corrugated board with its own compression deformation during the printing process, so that the printing ink is more uniform, thereby improving the quality of the finished product.
3. Flexographic printing belongs to light pressure printing Corrugated cardboard is corrugated due to its corrugation, which results in uneven pressure during the printing process. The corrugation is pressed at a large height, the corrugation is pressed lightly at low pressure, and corrugation is sometimes printed at low pressure. To the phenomenon that the ink cannot be printed. Offset printing and gravure printing can not overcome this defect, resulting in serious signs of corrugation. The flexo printing is light pressure printing. After the plate is compressed and deformed, the corrugated cardboard can be well contacted, and the high corrugated area will not produce severe marks due to the pressure. Some corrugated cartons printed with flexo printing technology have serious traces of corrugated and severe hard mouths, which are caused by the quality of the corrugated board, the thickness of the flexographic plate, the lack of selection of hardness, and poor operating technology.
4. Flexo printing can use water-based ink paper to be interlaced with fibers. Its hydrophilicity is better than that of lipophilicity. Therefore, water-based ink is used to print corrugated boxes. The printing plate needs only light contact with corrugated cardboard, and the water-based ink will be almost completely. absorbed. Flexographic printing uses a metal anilox ink transfer system that can use water-based inks and is more suitable for printing corrugated board.
The plate is flexible, deformable and has low pressure. The use of water-based ink is the ideal combination for printing corrugated cardboard.
5. The structure of the flexo press is simple. The corrugated box has a large area and the length of the cardboard can reach 2-3 meters. If offset printing is used, the equipment is huge and operation and maintenance are difficult. The flexible printing press has a simple structure, and the four rollers are made into one color group. After the diameter of the roller is larger, the mechanical performance and stability can be improved, and the loading, adjustment and cleaning are very convenient. As the production technology of plate material, metal anilox roller and water-based ink are mature, the corrugated paper box adopts...
6. Compatible with other processing equipments The production line flexo printing press has a simple structure and can be combined with other processes to form a linkage production line, greatly improving work efficiency and reducing labor intensity, and can meet the requirements of mass production. Most corrugated board presses are now combined with creasing machines and slotting machines for on-line production. The printing production line consisting of indentation, slotting, die cutting, glue coating, box making, and counting device can directly print the corrugated carton once.
At present, there are more two-color machines in the domestic market, and the performance is also general. Should pay attention to the development of 3 color machine, 4 color machine (spot color), 5 color machine (glazing) and linkage production line. Foreign advanced small-format flexographic printing speed is 350 sheets per minute, and large-format flexo printing speed is 170-220 sheets per minute. In comparison, the domestic printing speed of flexo printing presses also needs to be improved.
The above few indicate that flexo printing is the most ideal printing method for corrugated cartons, which not only suits the characteristics of corrugated cardboard, but also meets the requirements of product quality, and can also form large-scale production. Therefore, it is a high-quality, high-speed, and high-efficiency printing of corrugated cardboard boxes. method. However, we can only produce products that meet the printing quality requirements of corrugated boxes and should gradually become the main topic in the future.
Due to the different objects of Back to school Stationery, the style of stationery for students of different ages is also very different. The School Stationery for primary school students is mostly cartoon stationery series, while the stationery for middle school students and college students is mainly practical, and has been inclined to office stationery series.
Student Stationery Set covers a wide range. According to the characteristics of stationery itself, it can be roughly divided into the following four categories:
1. Writing stationery for students. For example:
Pencils, automatic pencils, pencil refill, watercolor pens, whiteboard pens, neutral pens, ballpoint pens, oil pens, pens, crayons, etc.
2. Modified stationery for students. For example:
Correction tape, correction fluid, eraser, etc
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Pencil bag, pencil case, file folder, excersice book,document file, etc.
4. Tool stationery for students.
Pencil sharpener, liquid glue, glue stick, ruler, compass, utility knife, scissors, book cover, etc.
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