Technical characteristics of corrugated cardboard direct offset printing
The main printing equipment for corrugated cardboard direct offset printing in recent years, the development speed of packaging printing in China is in the forefront of the printing industry. The production value in 2005 accounted for 32% of the entire printing industry. An increase of 12% over the previous year. In the packaging and printing industry, color packaging boxes account for a considerable proportion. With the development of economy and the continuous improvement of consumption level, people have higher and higher requirements on the packaging of commodities. Color packaging boxes not only have to protect the goods and facilitate transportation, but also require the original appearance of the goods to be truly reflected in the goods. On the outer packaging, it plays the role of showing the quality of the goods and promoting sales. Therefore, the color packaging box is a combination of product protection and product advertising functions, becoming a new type of product promotion carrier. The development of printing technology is a key influencing factor for the development of color packaging boxes. This article will briefly talk about a printing method of color packaging boxes-the direct offset printing technology of corrugated cardboard.
The market prospect of corrugated cardboard direct offset printing technology
The printing process of corrugated cardboard has gone from simple monochrome text printing to monochrome mesh tone image printing to today's color mesh tone image printing. The printing of corrugated cardboard boxes is towards high quality, multi-color, strong three-dimensional sense, and good visual effects. Development. At present, corrugated board printing has the most extensive gravure printing and offset printing. It also has a certain market share in China. In the processing technology, there are generally printing first, then mounting, pre-printing and direct printing. Printing first and then mounting is to print the facial paper first and then compound it on the corrugated cardboard, and then die-cut to shape. The pre-printing method is to use a web flexo printing machine or a web gravure printing machine for printing. After printing, it is still received in the form of web paper, and then the printed color roll paper is used as carton paper The corrugated board production line is made into corrugated board and then die-cut. Direct printing means printing corrugated cardboard directly on the printing machine. Corrugated direct flexo printing is currently mainly used for printing low-end carton boxes due to the limitations of equipment and related technologies, and the printing quality needs to be further improved. Direct offset printing of corrugated cardboard is a printing method that has developed rapidly in recent years. With the improvement of equipment and technology, the technology of corrugated cardboard direct offset printing has matured. Direct offset printing can well meet the development requirements of multi-color and high-quality corrugated cardboard printing, and the cost is relatively low. With the development of offset printing direct corrugated board technology, it will gradually replace flexographic printing in certain areas of corrugated box printing. The direct offset printing of corrugated cardboard has the following advantages over the printing methods of flexo and offset printing and then mounting:
1. Relative to flexographic printing
â‘ The printing quality is high, and extremely fine text drafts and complex screen tone images can be printed, and the number of screen lines can reach 200 lines / inch.
â‘¡The cost is lower, the cost of offset printing plate making is low, and the high standardization of offset printing also helps to reduce the printing cost. In addition, compared with the flexographic printing equipment offset printing equipment investment is less, the flexibility of the equipment is also higher. This also reduces the production cost of the product from another aspect.
â‘¢ The relatively short printing assistant time is more economical and suitable for short work.
â‘£ The printability of various special information has been significantly improved. Surface finishing such as laminating, glazing, etc. can be performed, and the printing quality is relatively stable.
2. Relative to the processing method of offset printing paper before mounting
â‘ Processes are correspondingly reduced: the processing costs and materials for the mounting process are eliminated accordingly. In addition, the reduction of the process makes the entire printing processing time relatively shorter, and the efficiency is improved. The waste between the processes is also reduced, and the labor is also reduced.
â‘¡ The amount of paper added is relatively small.
Currently, corrugated cardboard direct offset printing also has some limitations
â‘ Can not realize the linkage production of cardboard like flexographic printing equipment, the production efficiency is relatively low.
â‘¡At present, offset printing direct printing board is mainly printing mini corrugated board. For thick board with heavier weight, it can not be printed directly on offset printing machine.
â‘¢ The offset printing format is relatively limited, and the types of formats that can be printed are relatively few.
However, with the update of offset printing technology and equipment and the invention of corresponding new materials, the above limitations can be alleviated or even eliminated to a certain extent.
Through the above analysis, we can see that in the color packaging box printing, the direct printing of offset printing will become the main printing method of micro corrugated cardboard boxes. For cardboard and cardboard with relatively simple shapes and patterns and large batches, flexographic printing is still the mainstay. For color packaging boxes of top-quality printing quality, offset printing is used before mounting.
[NextPage]
Technical characteristics of corrugated cardboard direct offset printing
The structural characteristics of corrugated cardboard determine its technical characteristics when performing direct offset printing. Corrugated cardboard is printed on uneven surfaces formed by corrugated crests and troughs. The printing pressure during the printing process must be higher than the printing pressure required by the flat surface material and its printing pressure cannot damage the grooves and ridges of corrugated cardboard. . For such high difficulty requirements, it is impossible to achieve by simply controlling the operation of ordinary printing presses, but the development of corresponding technologies has solved the above problems. These related technologies mainly have the following points:
â‘ The new type of blanket adopts super-compressed sponge layer with good elasticity, which can compensate the corrugated cardboard wave crest and wave trough during direct offset printing, and improve the printing effect.
â‘¡ The successful development of new corrugated board also created conditions for direct offset printing of corrugated board. The change in the structure of corrugated cardboard improves the strength of corrugated cardboard and weakens the surface unevenness formed by the corrugated cardboard peaks and troughs.
â‘¢ The successful development of new ink has improved the printing quality of corrugated cardboard direct offset printing. A rubber blanket with good elasticity can reduce the pressure difference between the crest and trough of the corrugated cardboard, but it cannot completely eliminate the pressure difference, which will also form a difference in printing pressure. The overprinting of ink thus forms a quality problem for corrugated paper printing-the production of the "washboard" effect of printing. The new ink further reduces the print quality problems caused by the uneven surface of the corrugated cardboard. For example, the Well-Perfect-EV10l0-w type ink developed by the German GS Ink Factory is designed for direct offset printing of corrugated paper.
â‘£The continuous development of printing machine structure provides the necessary conditions for direct offset printing of corrugated cardboard. Now suppliers of offset printing equipment have noticed the development of offset printing in packaging printing, and have developed different types of printing equipment specifically for packaging printing.
Corrugated cardboard direct offset printing due to the printing pressure, the strength of the cardboard will also be reduced to varying degrees, in the printing process in the premise of ensuring the quality of printing needs to reduce the printing pressure as much as possible. Therefore, the direct offset pressure control of corrugated cardboard is the most important issue that we should pay attention to. It has a direct impact on the printing quality and the structure of the cardboard and is the key influencing factor of the final product quality.
The main printing equipment for direct offset printing of corrugated cardboard
The rapid development of color carton in recent years is a witness of direct offset printing of corrugated cardboard that is well-known to the industry Equipment for offset printing. Here are a few more interesting devices on the market:
â‘ KBA Offset Press: At the ChmaPrint2005 exhibition, KBA operators first printed beautiful products on 157 grams of coated paper on KBA 105, and then replaced the substrate with cardboard on the spot to complete from paper to different specifications The conversion of cardboard printing, and finally the direct printing quality of G-type corrugated cardboard (thickness 1ml-f1) can be described as perfect.
The perfect printing quality of corrugated cardboard is a strong proof of the maturity of corrugated cardboard direct offset printing technology. At the Chicago Printing Exhibition in 2005, KBA once again demonstrated the printing capabilities of KBA 105 on corrugated cardboard with a thickness of 1.2 mm. KBA's large-format offset press-Rapida 130 ~ 162a printed substrate thickness range: 0.04 ~ 1.2ram. The range of substrates printed by Rapida 185 and 205 is: 0.1 ～ 1.6ram. These large-format offset presses can directly print G, E and F corrugated cardboard. The KBA large-format printing machines currently purchased in China are mainly used for packaging printing. For example, the KBA Rapida 162a purchased by Shenzhen Huali Packaging Trading Company is to provide customers with high-end and exquisite large-size color packaging boxes and corrugated boxes.
â‘¡Roland printing machine: Roland printing machine has always been in the leading position in the field of packaging printing. The existing models can directly print corrugated cardboard from small to medium format to super large format. Roland 500 and 700 can directly print corrugated cardboard with a thickness of 1.0 mm, while Roland 900 series printers can directly print F-shaped corrugated cardboard with a thickness of 1.2 mm. In the first half of this year, Suzhou Dongyi Packaging and Printing Co., Ltd. introduced the first ultra-large format offset printing equipment in Asia-Man Roland 900XXL (maximum printing format is 1300m? X1850ram), the equipment can be directly in G and F type Printing on corrugated paper.
â‘¢ Heidelberg printing machine: Heidelberg CD series offset printing machine is specially designed for packaging printing, CD74 can directly print corrugated paper with a maximum thickness of 0.8mm, CD102 can directly print corrugated paper with 1.0mm. The XL105, which debuted at the Drupa2004 exhibition, has provided new options for packaging and printing plants. The thickest device can directly print 1.Omm corrugated paper.
â‘£ Japan-made offset presses: Among the offset presses made in Japan, Mitsubishi's thick cardboard printing capacity is relatively strong. Designed for thick cardboard EFJ. The model designed by @J-DIAM0ND3000Lc can be directly printed on corrugated cardboard with a thickness of 0.8mm. The thickness of DIAMOND3000LXEp ~ J can also reach 1.0mm. Qiushan printing machine also has a certain thick cardboard printing capacity. Its BT series offset printing machine is equipped with thick paper printing accessories to print 0.8mm corrugated cardboard.
⑤ Beiren offset press: Beiren has also developed some printing equipment suitable for packaging products in the past two years, and has also followed up on a large scale in a timely manner. Beiren 800 uses a double-diameter cylinder, which is more suitable for thick cardboard printing and can also be printed directly on mini corrugated cardboard with a thickness of 0.6mm.
Corrugated box color printing is an inevitable development trend. The characteristics of offset printing and its excellent printing quality meet the quality requirements of the development of corrugated box printing. Offset direct printing corrugated board now has a certain market share. With the improvement of carton printing quality requirements, offset direct printing corrugated board has a continuous growth trend. But this does not mean that offset printing of corrugated cardboard will dominate the future market for color printing of corrugated boxes. The rise and development of new processes will coexist with traditional processes for a long period of time, and complement each other.
Stainless Steel Bread Box! Basic Bread Box,finest quality 18/10 stainless steel for body.Robust,vesatile and durable in use.beautiful polished exterior with silver white appearance and easy to clean,make your life comfortable and healthy.Stainless Steel Bread Box,Raw material: 18/10 stainless steel,body thickness:0.3mm.Item Color: silver white,Mirror or Matt.Packing: 1pcs/ctn with two polyform.
Stainless Steel Bread Box
Stainless Steel Bread Box,Stainless Bread Box,Large Stainless Steel Bread Box,Black Stainless Steel Bread Box
JAPOP COMPANY LIMITED , https://www.japopkitchenware.com