Comparison of inkjet imaging and electrostatic imaging technology
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Inkjet imaging and electrostatic imaging are the two mainstream technologies of today's digital printing technology. The two technologies have their own characteristics. They are different in different application fields and lead each other in different historical development periods.
In terms of printing speed, inkjet technology is dominant, especially inkjet color machines, which are much faster than laser color machines. Taking the continuous color machine as an example, the fastest speed of the laser color machine is only 30 m/min, and the fastest in the world of inkjet is 750 m/min. In terms of printing cost, inkjet is much lower than laser. For example, a laser color machine charges a piece of A4 at a cost of about 0.40 yuan, while an inkjet is only about 0.05 yuan. In terms of print quality, many high-speed inkjet prints are not as good as lasers. In terms of paper adaptability, the laser machine can adapt to different papers more than the ink jet machine. Moreover, the laser machine usually has continuous paper and single sheet paper, and has strong flexibility and adaptability. In terms of stability, laser technology has many imaging links, complicated technology, high failure rate, high maintenance frequency and many downtimes. In terms of environmental protection, inkjet technology is more environmentally friendly.
Digital printing can be divided into commercial printing, bill printing, personal consumption imaging product printing, mixed printing with offset printing, book publishing, packaging printing, newspaper printing and so on. In different fields, laser technology and inkjet technology have their own short-term, and commercial printing is used as an example to introduce the application of the two technologies.
At present, digital commercial printing color is mainly based on sheet-fed laser technology. High-end machines such as Kodak's Nexpress, HP's Indigo, Xerox's iGen4, low-end and mid-range such as Kemei's C650, Canon's 7000, and Xerox's 8000. In this area, color machines have a top speed of 3,600 pages per hour, such as Kodak's Nexpress Se3600 and HP's Indigo 7000. The commercial machine generally adopts the PDF process, and the front-end software embeds many control parameters related to other before and after printing processes. Commercial printing paper requires a variety of materials, that is, there must be offset paper, but also copperplate paper, matte paper, and the printing quality requirements are also very high. At present, inkjet technology has not been widely used in this field.
It is worth noting that Kodak's Prosper 5000XL, a stream inkjet technology product launched at Print09 in Chicago in 2009, will revolutionize the current digital commercial printing landscape. The current version of Kodak's Prosper 5000XL is 600dpi, with a 1200dpi printhead in the future and a printed cable of 175lpi. The printing speed is 200 meters per minute. If you press A4, you can print 3,600 pages per minute, which is much higher than all the lasers on the market.
The most revolutionary is that Kodak's inkjet digital printing machine can not only spray non-coated paper like traditional inkjet printers, but also print the same quality as offset printing on coated paper and matte paper. It can fully meet the requirements of commercial printing for printing quality. Moreover, the cost of consumables is much lower than the cost of color lasers. A A4 color product manual, when the coverage rate is between 40% and 50%, the cost of consumables is about 6 cents. On January 27, 2010, Kodak and the famous American digital printing company Consolidated Graphics, Inc. announced that the first Prosper 5000XL will be installed at Consolidated Graphics, Inc. The Kodak Prosper 5000XL will be close to or exceed the traditional offset press in terms of production capacity, print quality, consumables cost and paper adaptability, and is the dominant commercial digital printing in the future.
At present, black and white commercial digital printing is also dominated by sheet-fed lasers, such as Kodak's Digimaster series, Océ's 6000 series, Xerox's Nuvera series, and low-end, Canon, Ricoh, Kemei, Océ, Xerox and other machines. . Similarly, Kodak introduced the Prosper 1000, a black-and-white printing press with Stream inkjet technology, at Print09 in Chicago in 2009. This product will have a profound impact on black and white digital commercial printing because of its good printing quality, low cost, high productivity and adaptability to a variety of media.