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Mr. Im Postado said: "The advantages and disadvantages of gravure printing are obvious. The main advantage of gravure printing is the high precision of image reproduction, and the printing effect is comparable to the photo. The biggest disadvantage of gravure printing itself is the short version. Higher printing costs In the past 10 years, gravure has made great progress in reducing the cost of short prints, but since single prints continue to decline, gravure does not have a competitive advantage over other print methods in terms of cost. â€
“The advantage of gravure printing is still long-run printing,†said Bill Wicher, publisher of gravure ink development at Flint Ink, who said that “as long as the required consumables are used and the general print job standards are followed, good print reproduction can be achieved.†The effect of gravure printing is reflected in short printing."
The feasibility of short-run printing It is generally believed that gravure applies only to long-run printing, while flexo-printing applies to short-run printing. Gravure printers disagree with this view. Mr. Kozi said: “The above views are related to the cost of replacing the graphic. Customers often request to print promotional labels, sometimes only need to change the address on the label, and think that gravure cylinders are costly compared to other printing methods. The industry has spared no effort to exaggerate this weakness, but in fact the cost gap between rotary gravure and flexo is very small.The gravure cylinder engraving processor has greatly reduced the internal processing costs, making the cost difference between gravure and flexo. Zooming out quickly."
Paraty Kering, vice president of production management at Nordenia Americas, said: “The above view is incorrect. In the past 10 years, Flexo people have been saying that the quality of flexo printing is almost as good as the quality of gravure printing. The cost of equipment is as high as the cost of gravure printing, the cost of a gravure cylinder is not much higher than the cost of a flexographic printing plate and an anilox roller, and the quality of first-rate flexo printing is still inferior to gravure printing quality. quality."
Time control is very important for gravure printers. Mr. Kozy said: “In 1994, American Packaging used SMED (One-minute die change) technology. Before that, we thought that our production was very efficient. The preparation time was the same in the industry, and there was nothing that needed improvement. Later we changed our attitudes, adopted new technologies, and achieved unexpected and good results, reducing the preparation time for all devices by 50%.
In addition, U.S. packaging companies have also invested a lot of money to make equipment changes. They try not to use various tools and replace them with quick clamping devices. Mr. Kozi said: "We think that if there is a need for job replacement time between different design options, there will be opportunities for improvement."
Ink manufacturers also believe that the prospects for short gravure printing are bright. Mr. Wicher said: “In the past, economic benefits dominated the long and short gravure, but now the use of digital front-end technology to speed up the preparation of the machine, no longer use proofing machines, roller and printing equipment has greatly improved the degree of automation, so short Version gravure can also achieve better economic benefits. Further improvement of the paper and ink stability will certainly reduce the scope of change, speed up the debugging, help determine the color and improve the job replacement rate."
Mr. Im Pastado said: “The gravure printing has always been more suitable for long-run printing because the cost of the gravure printing machine is higher. This cost must be shared in the long-run printing production process. The higher cost of the gravure Drums can only achieve good economic benefits if they are used for long-run printing.Because the machine has a long time, it is only reasonable that the time between the adjustment machine and the printing time is longer in the long-run printing.The technology to improve the competitiveness of the gravure short version Progress will be reflected in prepress and printing equipment."
Mr. Muren said: "Recently, we have used rapid carving equipment to shorten the processing time of gravure cylinders, improved plating efficiency, and made some progress in the effective use of digital documents and proofing technology. This has greatly reduced the cost and further increased the cost of short gravure printing. At the same time, gravure printer manufacturers are also designing new types of equipment to minimize machine preparation time and improve gravure productivity.The above improvement measures are particularly important in packaging and printing, because gravure printing machine packaging operation time is not as good as Published and printed for a long time."
The important manufacturer of gravure printing presses, the German company KBA, is currently developing new equipment that will further speed up the replacement of the workpieces. Mr. Johannes Popper, Project Manager of Rotary Gravure Press at KBA, said: “The gravure printing industry in the world has a clear trend of development. It is constantly striving to improve the degree of automation and monitoring, to analyze failures faster and more quickly. In Europe, the width of gravure printers has increased further, reaching 3.68 meters at a printing speed of 15 meters per second, and in North America, the web width is generally 3.18 meters. Super webs are often used to produce small sheets of 6 x 24 pages. In recent years, the gravure printing machine provided by KBA, especially the new type of gravure printing machine, has a relatively high degree of automation, and is equipped with a printing plate automatic exchange device. The gravure printing machine provided in the past one or two years also uses splash-proof ink. Supply device, plate cylinder and embossing roller cleaning device, ink, web width and tape automatic adjustment device, can be completed within 20-60 minutes by KAO preset device and easy-to-operate high-efficiency paper tape transmission technology The job conversion process." (To be continued)
Ink industry - talk about gravure (in)
Mr. Todd, of Sun Chemical Ink Company, said: "When printing reaches millions of impressions, gravure has always been the preferred method of printing. Long print quality, color stability is the main advantage of gravure. High front-end operating costs The cost of both roller manufacturing and proofing can be recovered by increasing the number of hourly impressions at a fixed print speed and web width. The cost before printing is fixed, and the larger the number of prints, the lower the cost of a single sheet print."