The most popular understanding of digital proofing

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Understanding of digital proofing (Part 1)

some understanding of digital proofing proofing as an intermediate link between prepress and printing. It is not only to check the work quality of plate making and proofreading personnel. It provides the basis and standard for the printing process, and is also an important means of quality management in the production process. As the post process of plate making. It is the reproduction process of image synthesis. It is the inspection of plate making effect 2 as the pre printing process. It is a standard for simulating printing for trial production, seeking the best condition matching and providing ink color for formal printing

a qualified sample can be analog output with color separation film in the traditional way or output on the digital proofing equipment. in other words; Proofing can be divided into analog proofing and digital proofing. The fundamental difference between these two proofing methods is whether there is traditional film output. With the development of prepress digitization and networking technology, the digital process of prepress "Yuan film" began to enter the prepress field as a powerful force, and the proofing technology experienced a new digital revolution

I. characteristics of digital proofing

the so-called digital proofing is a new proofing technology that directly outputs electronic originals after digital processing in electronic export. It uses a large format printer to directly output proofing in a digital way to replace the complicated process of film and printing in analog proofing

in the oncoming digital wave. People in the printing industry have high hopes for digital proofing. Industry experts believe that speed and stability have become the two advantages of digital proofing. Mainly reflected in; First, good reducibility and stable color. Because the simulated proofing mainly uses manual methods for inking and pressure adjustment; Therefore, the effect cannot be kept stable. If there is no digital proofing, the full digital process is adopted, so as to avoid the uncertainty of manpower in the traditional proofing. Second; Fast proofing speed; Save time. Suitable for short edition printing. Print a high-quality folio sample, and the digital proofing can be completed within 20 minutes. At this time, you can switch to the manual measurement mode. While simulation proofing takes 30-40 minutes. Third, there are few intermediate links, and the use of film is eliminated. On the one hand, it reduces the printing, film production and other links in the traditional proofing process. On the other hand, it also caters to the development trend of green printing and is conducive to environmental protection. Fourth, because the whole process is digital, it is convenient to use and easy to operate. Fifth, remote digital proofing can be realized. Due to the application and development of network technology, all the test conditions and evaluation conditions in the new national standard of the remote station are selected according to the actual use conditions of the product, and the proofing equipment is used for digital proofing, so as to provide users with digital proofs. This remote digital proofing breaks through the limitations of time and space, and is simple and practical

of course, digital proofing is the best way to show its style; Its shortcomings have also been revealed, which are mainly reflected in: first, although the development of digital proofing technology is becoming more and more mature. But the technology of digital proofing is not very mature; In particular, the current digital proofing equipment lacks a unified standard; It makes it difficult for operators and customers to adapt. Second, because some digital proofing uses frequency modulation points, the operation technology of such points is more complex in front of the diagram, which is also difficult for insiders who are used to amplitude modulation points. Third, the application scope of digital proofing is not universal, and it can not meet the requirements for spot color proofing such as bronzing and silver stamping, which can be easily solved by traditional proofing. Fourth, the problem of consumables is prominent. At present, special paper is required for digital proofing, which increases the printing cost and affects the reliability of the sample. Fifthly, the digital proofing manager hopes that those who operate the experimental machine can do a good job in these seven points. The matching between the software and the printing machine, imagesetter and other supporting equipment is still inconsistent. Therefore, in terms of the current development of digital proofing; Due to its slow popularization and the cost of consumables, if there is no strict requirement on the active source cycle, the general practitioners still choose the traditional simulation proofing

looking at the development of the printing industry, from the foreign situation, at present, advanced countries have begun to popularize digital proofing, and some developing countries have just begun to use it; From the domestic situation, the digital proofing technology has been widely used in gravure printing, but in the development of offset printing, C919 is still in its infancy compared with Airbus 320 Boeing 737. At present, the promotion and popularization of digital proofing technology in Guangzhou, Shenzhen and other places is at the leading level in China

today, with the coexistence of digital proofing and analog sample ordering, although the characteristics of digital proofing have emerged without doubt, there are still some areas that need to be improved in the development and application. Therefore, comprehensive promotion still needs a process. From the perspective of technical development, digital proofing technology eliminates the interference of human and other external factors, greatly improves the reliability and stability of proofing output, and shortens the process flow as much as possible. In addition, digital proofing can modify samples at any time, which theoretically reduces the cost. With the popularization and popularization of digital proofing technology, it can completely solve many problems in analog proofing, such as long production cycle, unstable proofing quality and high cost, thus triggering another digital revolution in the printing field. It can be predicted that digital proofing is the general trend to replace analog proofing

II. Digital proofing technology

digital proofing technology is becoming an indispensable part of the digital printing pipeline. There are four kinds of digital proofing technology: Digital semi continuous point adjustment technology; Continuous ink jet technology; Dye sublimation and dro on demand (dodl). In addition, other digital proofing technologies such as variable point transfer laser technology and hot wax technology have also been applied in the digital proofing system. But the concrete application is not widespread. The following briefly introduces four commonly used digital proofing techniques. (to be continued)

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