In the field of printing production today, the application of digital information processing and computer control technology has been extensively deepened. Contact the overall concept of pre-press, printing and post-press-"Digital Workflow" is to integrate the above three different processes into an indivisible system with digital production control information, so that the digital graphic information is transmitted completely and accurately , And finally processed into printed products. The formation and progress of digital workflow in the field of printing industry will inevitably promote the further development of the printing industry in the digital environment, improve its competitive strength, and play an important role in information exchange and sharing with other fields.
The pre-press digital workflow has now launched a variety of solutions, including PostScript workflow, dedicated workflow, bitmap workflow and PDF workflow. Among them, the PDF-based workflow is the most popular workflow at present. In the PDF workflow, PostScript data or other data formats are converted to PDF format. PDF avoids the unpredictability of the PostScript page description language. PostScript files from any application software and any platform are converted to PDF format.
Hualian Printing is currently applying the leading PDF-based Prinergy (Prinergy) workflow. Prinergy (Prinergy) is currently a relatively complete PDF workflow, it uses a client / server architecture, the software uses distributed processing, Prinergy (Prinergy) main software runs on the server, the operator can be in the local area network It can be operated freely on any PC or Apple computer. Through the client software Workshop written in JAVA language, several operators can simultaneously process a job at different addresses at the same time, which greatly improves the production efficiency.
1. Requirements for applying digital workflow
1. Large capacity and fast network transmission system. A large amount of data information is transmitted on the network during the production process of the CTP digitization process, and the Internet is used to establish its own FTP website to facilitate customers to upload and download files.
2. Screen dot scanner (Copydot) can meet the requirement of converting traditional film into electronic file.
3. It is required that the digital workflow has strong compatibility, can interpret the data generated by any front-end production software, and must have a strong and flexible output capability.
4. Establishment of standardized color management system.
5. Mature and stable digital proofing solution. The digital proofing scheme plays a more important role in the entire process. The main performance of digital proofing is to see whether it is fast, reproducible, and saves raw materials. It also depends on whether it can perform better color control. , Especially in the three aspects of remote proofing matching, CTP curve adjustment and CTP output.
6. Intelligent and reliable layout solutions and large-scale proofing equipment.
In short, not only the basic conditions for equipment, personnel, and materials are required to build a digital workflow, but also a well-established digital environment, front-end file system interface technology solutions, electronic file management and data storage backup, network transmission speed, color management, and RIP technology Training on the optimization and reconstruction of employee knowledge. At the same time, according to your actual needs, through comparative analysis of new and old technologies and process flows, inherit the advantages of traditional processes, give full play to the characteristics of new technologies, in color separation screen, tone transfer, digital proofing, layout and The matching of printing conditions and other key points has transformed the theoretical advantages of digital workflow into true productivity. Facing the digital workflow, the effective way to realize the adaptation of each process can be divided into the following parts.
â‘ Analyze whether the conditions of equipment, personnel and materials for constructing the CTP process are mature.
â‘¡CTF process can be used as the basis to gradually form an output solution.
â‘¢Establish production standards and quality specifications, do a variety of data testing work, and summarize all possible situations, adjust and improve solutions.
â‘£ Carry out the process and application test of the CTP process. Only in this way can the normal operation of all production processes of the CTP process be truly realized, and the smooth work of the digital workflow can be guaranteed.
Second, the application of digital workflow in the prepress center
1.194; Take FTP server as the platform and integrate high-speed non-destructive remote transmission technology to easily realize printing tasks in two or more places, undertake overseas orders and other printing tasks, and guarantee time and quality.
Hualian Printing not only has its own dedicated FTP server, but also provides customers with specific services for the confidential transmission of files. Customers can transfer files through FTP dedicated software or IE browser. The simultaneous use of multiple FTP greatly shortens the file transfer time, and the short delivery time of the printed matter can win time for the subsequent process, providing a strong guarantee for remote printing.
2. High-precision roller scanner and platform scanner meet the precise copying of various originals. Copydot dot scanner can convert the film into an electronic file and realize the CTP output of the advertising film.
The quality of the manuscript electronic division is one of the important factors affecting the printing quality. Hualian Printing has Heidelberg D3900, D7100 cylinder scanner and Heidelberg NexScanF4100, Kodak (formerly Creo) EVERsmart select platform scanner, EZIO Color Edge CG19 display and various auxiliary equipment. Hire senior electronic color grading personnel who have worked for many years, and provide customers with free software and hardware support and technical training to achieve true WYSIWYG.
3. The perfect desktop processing system can support the application of various software, maintain software updates and file compatibility at any time, and can flexibly edit and typeset various files to meet the needs of customers' design and production.
4.194; Powerful and stable Prinergy (Prinergy) workflow can directly convert PDF, PS and EPS formats into outputable PDF files. The industry-leading imposition tool Preps can quickly and easily combine single pages into large versions, any binding All methods are easy to achieve; one RIP output multiple times, you can directly output digital samples, film and CTP version, the Acrobat Pit Stop tool can edit and modify the final PDF file, and achieve the last minute revision for customers; within Dlove 800v3 Drum imagesetter and Lotem 800 Quantum thermal CTP cooperate with AM and FM screening technology to restore the images more delicately.
The interpretation, proofing, and output of documents are the top priorities of the entire digital process. It can be said that the work of the entire prepress center revolves around these three tasks, which is directly related to the normal operation of the entire digital workflow.
â‘ Interpretation of documents The interpretation of documents by the Prinergy workflow is extremely stable and fast. It can correctly explain the files produced by various versions of software, and the design effects that are difficult to explain by various RIPs such as transparency and shadows.
â‘¡ Proofing blue paper format proofing is directly driven by the Prinergy (Prinergy) workflow to drive the blue paper proofing machine; digital proofing is exported by the Prinergy (Prinergy) workflow to export TIFF files, through GMG Colorproof software on the digital printer proofing, and can Provide customers with remote proofing services, so that customers can see printed colors without leaving home.
â‘¢Prinergy output workflow can use secondary server to drive output device. Hualian Printing's workflow software and output device are the same supplier, so it is very convenient in compatibility, quality management and parameter adjustment.
5. A standardized color management system runs through the entire process. A full set of color management tools and software: ProfileMaker, Eyeone, SpectroScan, GMG software, etc., perfectly unify the colors of monitors, digital proofs and printed products, and truly realize what you see is what you get.
6. Powerful file storage space, convenient and fast file backup solution and fast and stable local area network are the prerequisites for digital prepress.
7. Prinergy (Prinergy) workflow can generate CIP3 files, digital information can be directly connected to the printing machine to achieve ink volume control and register control, reducing the time of the preset machine, reducing the loss and shortening the production cycle.
Third, the current problems in the application of digital processes
1. The customer does not have enough understanding of the digital workflow, and the electronic files provided do not meet the requirements of the workflow. For example, the embedded ICC of the PDF file is inconsistent with the printing house; the font is not embedded in the PDF file. Hualian Printing Prepress Center has a professional technical team dedicated to technical support and customer training. They always keep in touch with customers, understand customer needs and provide comprehensive solutions for customers.
2. The operability of digital workflow in specific environments needs to be improved. Good equipment and excellent technicians may not necessarily have the most effective and practical process. How to produce efficiently and correctly is a question worth considering. Different printing plants have different environments and different strengths. Only by constantly summing up and improving in practice and production according to their own characteristics can they find their own production process.
There are many journals printed by Hualian Printing, and the time for issuing papers is relatively concentrated. The production, proofing and output of 70 or 80 publications can be completed in just ten days. It is impossible to achieve without a reasonable production process. The production of periodicals is highly random, and there is a possibility of revision 1 minute before publication. This is also a challenge for pre-press work. Only in the digital process can production tasks be completed accurately and on time, so we must continue to establish Modify and improve our production process.
3. Because some software versions are too new, problems may occur in the workflow back-end server RIP, which needs to be analyzed and solved according to the actual situation.
4. Customer acceptance of digital workflow needs to be improved. Such as whether the network transmission of PDF files is widely used by customers, whether the color of digital proofing can be recognized by customers, whether the color adjustment of CTP printing can be recognized by customers, and so on.
In short, the mature application of digital workflow not only requires reasonable software and hardware configuration, but also considers how to provide customers with more and more convenient value-added services, and requires customers to participate in the process. Customers are part of the process. The role of the digital workflow is to effectively shorten production time, reasonably arrange production schedules, improve product quality and save production costs. With the further development of digital workflow, the distance from pre-press to printing will become shorter and shorter, and the future printing industry will become more reasonable and simpler. Although many domestic printing companies have applied digital workflows, the degree of digitization still needs to be improved. This may be due to factors such as technical mastery, software and hardware configuration, and market demand. Most of them are still in the exploration stage. I hope this article can be used for reference.
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